Emerson Vilter VilTech Operation manual

VILTech micro-controller
Operation and service manual

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Important Note:
Before applying power to the control panel, all wiring to the panel should be per NEC. Specifically check for
proper voltage and that the neutral is grounded at the source. An equipment ground should also be ran to
the panel.
*See Wiring Instructions and Diagrams before proceeding.
Beforestart-up,enterallsystemvalues andoptions. Seesectionon SetpointValues.

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Table of Contents
Important Note: ......................................................................................................................................................................3
Domestic Terms and Conditions .......................................................................................................................................... 10
Export Terms and Conditions ............................................................................................................................................... 12
Chapter 1 .........................................................................................................................................................11
Spare Parts List .................................................................................................................................................................... 12
Pre-StartupCheck List ......................................................................................................................................................... 13
Retrofit Kit Instructions ....................................................................................................................................................... 14
Operating Procedures .......................................................................................................................................................... 19
Definitions ........................................................................................................................................................................... 19
Keypad Functions ............................................................................................................................................................... 20
Main Screen Overview ......................................................................................................................................................... 22
Screen Types ....................................................................................................................................................................... 23
Menu Screens ...................................................................................................................................................................... 23
Menu Option Selection ........................................................................................................................................................ 24
Data Entry Screens .............................................................................................................................................................. 24
Cursors ................................................................................................................................................................................ 25
Data Entry Procedures ......................................................................................................................................................... 25
Data Screen Keys................................................................................................................................................................. 25
Field Types .......................................................................................................................................................................... 26
Selectable Fields .................................................................................................................................................................. 26
Numerical Data Input Fields................................................................................................................................................. 26
Absolute Pressure Fields ..................................................................................................................................................... 27
Time Fields ........................................................................................................................................................................... 27
Date Fields ........................................................................................................................................................................... 27
String Fields ......................................................................................................................................................................... 28
Telephone Number Field ...................................................................................................................................................... 28
HexadecimalFields ............................................................................................................................................................... 28
Status Screens ..................................................................................................................................................................... 30
Confirmation Screens ........................................................................................................................................................... 31
Confirmation Screen Procedures .......................................................................................................................................... 31
Momentary Screens ............................................................................................................................................................. 32
Information Screens ............................................................................................................................................................. 33
Access Screens.................................................................................................................................................................... 34
Log Screens ......................................................................................................................................................................... 35
Alarms& Failures ................................................................................................................................................................ 36
Modes Of Operation ............................................................................................................................................................ 39
Chapter 2 .........................................................................................................................................................39
Compressor Controls ........................................................................................................................................................... 39
Starting the Compressor ...................................................................................................................................................... 40
Manual Start ........................................................................................................................................................................ 40
Automatic Start .................................................................................................................................................................... 40
Remote/Auto Remote Start .................................................................................................................................................. 41
I/O Control ........................................................................................................................................................................... 41
NetworkControl................................................................................................................................................................... 41
Sequenced Start ................................................................................................................................................................... 41
Stopping the Compressor .................................................................................................................................................... 42
Manual Stop ........................................................................................................................................................................ 42
Automatic Stop .................................................................................................................................................................... 42
Remote/Auto Remote Stop .................................................................................................................................................. 42
I/O Control ........................................................................................................................................................................... 42
NetworkControl................................................................................................................................................................... 42
Sequenced Stop ................................................................................................................................................................... 42

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Capacity Control .................................................................................................................................................................. 43
Manual Capacity Control ..................................................................................................................................................... 43
Automatic Capacity Control ................................................................................................................................................ 43
Control Groups .................................................................................................................................................................... 44
Cut-Out Setpoint.................................................................................................................................................................. 44
Cut-In Setpoint .................................................................................................................................................................... 44
Control Setpoint................................................................................................................................................................... 44
LowAlarm/Failure Setpoints ................................................................................................................................................ 44
Time Proportional Control Strategy ..................................................................................................................................... 44
Control Deadband................................................................................................................................................................ 44
NormalBandwidth ............................................................................................................................................................... 44
NormalStage Delay . ............................................................................................................................................................ 44
Fast Stage Delay - ................................................................................................................................................................ 44
DifferenceAbove Setpoint .................................................................................................................................................. 45
Load Bandwidth................................................................................................................................................................... 45
Unload Bandwidth ............................................................................................................................................................... 45
DifferenceBelow Setpoint ................................................................................................................................................... 45
RemoteCapacity Control ..................................................................................................................................................... 45
Auto-Remote Capacity Control............................................................................................................................................ 45
Sequenced Capacity Control ............................................................................................................................................... 46
LowAlarm and Failure Setpoints ......................................................................................................................................... 46
Running in Trim Mode......................................................................................................................................................... 46
Running in Full Load Mode ................................................................................................................................................. 47
Anti-Cycle in Sequenced Mode........................................................................................................................................... 47
ForcedUnloading & Limiting............................................................................................................................................... 47
RampStart............................................................................................................................................................................ 47
CapacityRamp StartLimiting ............................................................................................................................................... 48
Staging Setup....................................................................................................................................................................... 49
MinimumCapacity ............................................................................................................................................................... 49
Setpoint Scheduling............................................................................................................................................................. 50
Daily Schedules .................................................................................................................................................................. 50
Weekly Schedule ................................................................................................................................................................. 50
Oil Pressure Computation ................................................................................................................................................... 50
OilTemperature Regulation.................................................................................................................................................. 50
Anti-Cycle Timer .................................................................................................................................................................. 51
PowerFail Restart ................................................................................................................................................................ 51
Process Temperature Control (Option) ................................................................................................................................ 51
Two Stage Configuration (Option) ....................................................................................................................................... 51
Operational Procedures........................................................................................................................................................ 52
Status Screens ..................................................................................................................................................................... 54
Compressor Main Status Screen.......................................................................................................................................... 54
Status Banner....................................................................................................................................................................... 55
Current System State ........................................................................................................................................................... 56
CURRENTSTATEDESCRIPTION ....................................................................................................................................... 56
Mode Area ........................................................................................................................................................................... 56
MODEDESCRIPTION ......................................................................................................................................................... 56
Alarm& FailureArea ........................................................................................................................................................... 57
ALARMSYSTEMSSTATUS .............................................................................................................................................. 57
MESSAGE ............................................................................................................................................................................ 57
Operating Hours Screen....................................................................................................................................................... 57
TERMDEFINITION ............................................................................................................................................................. 57
ActiveAlarms & Failures Status Screen .............................................................................................................................. 58
ActiveAlarms & Failures Status Screen Definitions ........................................................................................................... 58
ActiveAlarms & Failures Status Screen .............................................................................................................................. 58
Auto-Start Warning Screen.................................................................................................................................................. 59

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SETPTHot Key.................................................................................................................................................................... 59
AUTO Start Warning Screen............................................................................................................................................... 59
SETPT Hot Key Screen ....................................................................................................................................................... 59
Setpoints............................................................................................................................................................................. 60
Pressure Setpoints ............................................................................................................................................................... 61
Suction Pressure Control Groups......................................................................................................................................... 61
High Suction Pressure Setpoints ......................................................................................................................................... 63
Discharge Pressure Setpoints .............................................................................................................................................. 64
Oil Pressure Setpoints.......................................................................................................................................................... 65
Intermediate Pressure Setpoints (Two Stage only) Option .................................................................................................. 66
Temperature Setpoints ......................................................................................................................................................... 67
Discharge Temperature Setpoints ........................................................................................................................................ 67
Oil Temperature Setpoints.................................................................................................................................................... 68
Process Temperature Control Group .................................................................................................................................... 69
High Process Temperature Setpoints ................................................................................................................................... 70
Note Page............................................................................................................................................................................. 71
Capacity Setpoints............................................................................................................................................................... 72
Scheduling ........................................................................................................................................................................... 73
Control ................................................................................................................................................................................. 73
Active Group ....................................................................................................................................................................... 74
Active Schedule................................................................................................................................................................... 74
Weekly Schedule ................................................................................................................................................................. 75
Daily Schedule ..................................................................................................................................................................... 75
CAPControl......................................................................................................................................................................... 77
Suction Pressure Control Setpoints ..................................................................................................................................... 77
Process Temperature Control Setpoints............................................................................................................................... 78
MISCControl ....................................................................................................................................................................... 79
LOGSHotKey ..................................................................................................................................................................... 80
MENUSHot Key ................................................................................................................................................................. 80
Chapter 3 .........................................................................................................................................................81
Logging Functions Technical overview............................................................................................................................... 81
Logging Functions .............................................................................................................................................................. 81
Trend Log ............................................................................................................................................................................ 82
AlarmLog ............................................................................................................................................................................ 82
FailureLog ........................................................................................................................................................................... 82
User Log .............................................................................................................................................................................. 82
Logging Functions Operating Procedures........................................................................................................................... 83
Operations and Trend Logs ................................................................................................................................................. 84
Alarm and Failure Logs ........................................................................................................................................................ 85
User Log .............................................................................................................................................................................. 86
ClearLogs ............................................................................................................................................................................ 86
ClearAll Logs....................................................................................................................................................................... 87
Set Log Rate......................................................................................................................................................................... 87
Logon User .......................................................................................................................................................................... 89
Logoff User .......................................................................................................................................................................... 89
AutomaticLog Off ............................................................................................................................................................... 89
Chapter 4 .........................................................................................................................................................89
Menu Functions .................................................................................................................................................................. 89
Set-up Menu ........................................................................................................................................................................ 91
SetClock .............................................................................................................................................................................. 91

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Calibrate Sensors ................................................................................................................................................................. 91
DynamicSensor Calibration................................................................................................................................................. 91
Static Sensor Calibration ...................................................................................................................................................... 91
Passwords............................................................................................................................................................................ 92
Adding/Deleting Users ........................................................................................................................................................ 92
Screen Access Levels .......................................................................................................................................................... 92
Initialization.......................................................................................................................................................................... 92
PowerFail Reset................................................................................................................................................................... 92
Set Factory Configuration.................................................................................................................................................... 93
Configuration ....................................................................................................................................................................... 93
Display ................................................................................................................................................................................. 93
Communication .................................................................................................................................................................... 93
Set Operating Status ............................................................................................................................................................ 93
Staging Configuration.......................................................................................................................................................... 93
Control Configuration .......................................................................................................................................................... 93
Adjust Contrast ................................................................................................................................................................... 93
Operational Procedures........................................................................................................................................................ 94
Logon User .......................................................................................................................................................................... 95
Logoff User .......................................................................................................................................................................... 95
Diagnostics .......................................................................................................................................................................... 96
System Information .............................................................................................................................................................. 96
ViewDiscreteI/O ................................................................................................................................................................. 97
ViewAnalogs ....................................................................................................................................................................... 98
Communication Status ....................................................................................................................................................... 100
OverrideDiscrete I/O ......................................................................................................................................................... 101
Set-up................................................................................................................................................................................. 102
Set Clock ........................................................................................................................................................................... 102
Calibrate Sensors ............................................................................................................................................................... 103
DynamicSensor Calibration............................................................................................................................................... 104
Static Sensor Calibration .................................................................................................................................................... 105
Password Control............................................................................................................................................................... 106
Password Control Screen ................................................................................................................................................... 106
Add/Delete User ................................................................................................................................................................ 107
Access Levels.................................................................................................................................................................... 108
Initialization........................................................................................................................................................................ 109
PowerFail Reset................................................................................................................................................................. 109
Set Factory Config ............................................................................................................................................................. 110
Setpoint Save/Restore ....................................................................................................................................................... 110
Save/Restore Status........................................................................................................................................................... 110
Configuration ..................................................................................................................................................................... 111
Display ............................................................................................................................................................................... 111
CommSetup ....................................................................................................................................................................... 112
Set Op Stats ....................................................................................................................................................................... 113
Setup Stages ...................................................................................................................................................................... 114
Control Configuration ........................................................................................................................................................ 115
Adjust Contrast ................................................................................................................................................................. 115
Variable Frequency Drive Option ....................................................................................................................................... 116
Sequencer Control........................................................................................................................................118
Sequencer Technical Section ............................................................................................................................................. 118
Sequencer System Control Parameters .............................................................................................................................. 119
Sequencer Staging Control ................................................................................................................................................ 119
DifferenceAbove Setpoint ................................................................................................................................................ 120

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Load Bandwidth................................................................................................................................................................. 120
Unload Deadband .............................................................................................................................................................. 120
Unload Bandwidth ............................................................................................................................................................. 120
Sequencing Commands...................................................................................................................................................... 120
System Control Parameter and Setpoint Communication ................................................................................................... 120
Sequencer Operations........................................................................................................................................................ 121
Sequencer Lead List........................................................................................................................................................... 121
Enabling and Disabling the Sequencer .............................................................................................................................. 124
Sequencer Control Groups ................................................................................................................................................. 124
Sequencer Setpoint Scheduling ......................................................................................................................................... 124
Alarm and Failure Setpoints............................................................................................................................................... 125
Setting up VILTech Panels for Sequencing ........................................................................................................................ 125
Sequencer Operating Procedures....................................................................................................................................... 126
Sequencer Status Screen ................................................................................................................................................... 126
SEQ HotKey ...................................................................................................................................................................... 127
LEADLIST ........................................................................................................................................................................ 127
CNTRLGROUPSELECT .................................................................................................................................................... 127
SCHEDULING .................................................................................................................................................................... 127
SCHEDULESETUP ............................................................................................................................................................ 127
DAILYSCHEDULE ............................................................................................................................................................ 127
SCHEDULE01 .................................................................................................................................................................... 127
SCEHDULE02 .................................................................................................................................................................... 127
SCHEDULE07 .................................................................................................................................................................... 127
HIGHALARM ................................................................................................................................................................... 127
LEADLISTA ..................................................................................................................................................................... 127
LEADLISTB ..................................................................................................................................................................... 127
CURRENTACTIVELEADLIST ........................................................................................................................................ 131
Control Group Select .......................................................................................................................................................... 132
CONTROLSETPT.............................................................................................................................................................. 132
LOWALARM.................................................................................................................................................................... 132
LOWFAILURE .................................................................................................................................................................. 133
Schedule Setup .................................................................................................................................................................. 133
Daily Schedules ................................................................................................................................................................. 134
SCHEDULEDTIME ........................................................................................................................................................... 134
SELECTEDGROUP ............................................................................................................................................................ 134
SELECTEDLEAD .............................................................................................................................................................. 134
LIST ................................................................................................................................................................................... 134
HighAlarm ......................................................................................................................................................................... 135
Addendumfor Pump DownProgram forVILTech.............................................................................................................. 136
APPENDIX A ............................................................................................................................................... 139
Alarmand Failure Data ...................................................................................................................................................... 139
AnalogAlarms ................................................................................................................................................................... 139
High Suction Pressure ....................................................................................................................................................... 139
Low Suction Pressure ........................................................................................................................................................ 139
High Discharge Pressure ................................................................................................................................................... 139
HighOilTemperature ......................................................................................................................................................... 139
LowOil Pressure ................................................................................................................................................................ 139
LowIntermediateTemp(Two Stage)................................................................................................................................... 139
High Process Temperature(Option).................................................................................................................................... 139
Low Process Temperature(Option) .................................................................................................................................... 139
High Intermediate Pressure (Two Stage) ............................................................................................................................ 140

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Low Intermediate Pressure (Two Stage)............................................................................................................................. 140
DiscreteAlarms .................................................................................................................................................................. 140
APPENDIX B ............................................................................................................................................... 141
Analog and Discrete I/O .................................................................................................................................................... 141
Analog Inputs.................................................................................................................................................................... 141
APPENDIX C ............................................................................................................................................... 143
CommunicationProtocols .................................................................................................................................................. 143
Introduction ....................................................................................................................................................................... 143
Applicable Documents ...................................................................................................................................................... 143
Hardware Interface Description ......................................................................................................................................... 144
HardwareRequirements ..................................................................................................................................................... 144
Interface Connections........................................................................................................................................................ 144
PinName ............................................................................................................................................................................ 144
Message Addressing ......................................................................................................................................................... 146
Software Interface Description .......................................................................................................................................... 148
Protocol Overview ............................................................................................................................................................. 148
Status Only or Status and Control Options ....................................................................................................................... 148
Message Categories .......................................................................................................................................................... 148
MODBUSProtocol Description ......................................................................................................................................... 149
Preset Single Register ........................................................................................................................................................ 150
Preset Multiple Registers ................................................................................................................................................... 150
Error Messages .................................................................................................................................................................. 151
Data Formats...................................................................................................................................................................... 151
Status Message Description.............................................................................................................................................. 152
Analog Input and Computed Parameters ........................................................................................................................... 152
Discrtete Input and Outputs .............................................................................................................................................. 153
Alarmand Failure Data ...................................................................................................................................................... 154
Equipment Data.................................................................................................................................................................. 157
Alarm Status Table ............................................................................................................................................................. 157
Compressor Mode Table .................................................................................................................................................... 157
Compressor State Table ..................................................................................................................................................... 158
Last RECIPStart StatusTable ............................................................................................................................................ 160
Control Message Description ............................................................................................................................................ 160
Networkin ControlCommand ............................................................................................................................................ 161
Compressor Start/Stop....................................................................................................................................................... 161
Set Comressor Capacity Command .................................................................................................................................... 162
Change Compressor Mode Command ............................................................................................................................... 162
Acknowledg/ClearActiveAlarmCommand ....................................................................................................................... 163
Change Current Setpoint Group Command ........................................................................................................................ 163
Change Control Type Command ........................................................................................................................................ 163
Auto Start/Stop Contol Command ..................................................................................................................................... 163
Suction Pressure Setpoint Message Description............................................................................................................... 164
Process Temperature Setpoint Message Description ........................................................................................................ 165
APPENDIX D ............................................................................................................................................... 166
Condensor Control ............................................................................................................................................................ 166

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Notes Page

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Spare Parts List
QNTY Part# Item
1 3400A MicrocontrollerBoard
1 3400B I/O(DigitalandAnalog) Board
1 3400C DisplayInterfaceBoard
1 3400CG 240x128LiquidCrystalDisplay
1 3400F ControllerFuse PackConsisting of1-15amp main,3-5amp I/O
1 400K ControllerPowerSupply
2 3400M 120VACSolidStateOutputModule
2 3400N 120VACSolid StateInput Module
1 3400R EEPROM
1 3400Y CableKit (incl displaycable,p.s. to main, p.s.to I/O bd)
1 2611N DETECTOR -58/122DEGTEMP RESIST4-20MA
1 2611P DETECTOR32/392DEG TEMPRESIST 4-20MA
1 2783D2 TRANSDUCERAKS33 0-414.5PSIA4-20MAOUT
1 2783D4 TRANSDUCERAKS33 0-200PSIA4-20MAOUT
2 3122B CORDSETRK4T-4/S618TURCK

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Chapter 1
Pre-Startup Check List
Pre-Wired done at factory. The necessary field wiring connections are described below.
1. Connect power(L1) toe-stopat terminal#2. Then neutralis connectedon TB5 tothe
middleterminallabeled “N”.Lastconnectground onTB5attherightendterminal
labeled“G”.
2. Connect theCompressor MotortoChannel 1,the hotleadconnects toterminal 4and
theneutralend toterminal1.
3. Connect theMotor StarterAUX toChannel 9.The hotsideof thedrycontact to
terminal34. Theneutralside ofthe drycontacttoterminal35.
4. At thistime connectAUX #1,AUX #2,Remote Start/Stop,or water solenoidthat
mayhaveshipped looseperthe wiringdiagram.
5. First, press“Menu” keythen press“#1”then nextpress “clear”now enterthe pass-
word“999999”. Thenenter setpointsbypushing “SETPT”key then#2 forSetpoints.
Nowgo through eachscreen for1.Pressure, 2.Temperature, and3.Capacity.Usethe
“QUIT”or “SAVE”buttontogotopreviousscreen.
6. Still under“Setpt” screensetup CapactiyControl bypressing#4andMiscControlby
pressing#5. Ifmultiple controlsetpointsare goingto beused thensetupaScheduleby
pressing#3,please readthemanual formoreinformation.
7. Now pressthe “Menu”buttonthenpress#4“SystemSetup” then#5 “Configure
Hardware”then#4“StagingConfiguration”,nowonthisscreenpleasemakesurethat
thecorrect stepsof unloadingareshownonthe rightside ofthe screen,if thesteps are
notcorrectthenlookin themanualorcallElectricalEngineering atVilterManufactur-
ingLLC. Nowtoget outof thisscreen press“Quit” keyif nochangeswere done
otherwisepress “Save”to gettothepreviousscreen.
8. Nextpress#5“Control Configuration”andverifytherefrigerant andenable/disable
anyoptions that areneeded or not.

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Chapter 1
Retrofit Kit Instructions
Belt Drive
MountatMotorEnd of Unit Direct Drive Mount Suction Side of Unit

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WARNING
Do notbring in or runany
wiringon top ofpanel.
Do not run DC voltage on
thesamesideasthe
AC Voltage.
All120V wires must enter
the lowerright corner of
panel or all warranties
will be void.
D
O
N
O
T
R
U
N
A
C
a
n
d
D
C
w
ires
TOGETHER!!!

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NOTES:
1) CONNECT ALL SENSOR DRAIN WIRES AT THIS
LOCATION.
2) DOTTED WIRING REPRESENTS FIELD WIRING
3) DOTTED COMPONENTS NOT BY VILTER
4) FOR NEMA 3, 3R, 4 & 12 PANELS, ALL OPENINGS TO
BE GASKETED.
5) MOTOR STARTER WIRING WILL VARY. REFER TO
STARTER MANUFACTURER‘S DIAGRAM FOR ACTUAL
WIRING.
6) ALL CONDUIT CONNECTIONS TO THE PANEL MUST
BE MADE WITH FLEXIBLE CONDUIT.
7) FUSE 5 AMP FAST BLOW.
8) ONLY (4) FOUR INCHES OF SIGNA WIRES SHOULD
BE UNSHIELDED AT SENSOR END.
9) CABLE FOR ANALOG DEVICES UNLESS SHOWN
OTHERWISE IS BELDEN #9533 OR EQUIVALENT. 24
AWG, 3 CONDUCTOR, SHIELDED WITH DRAIN WIRE,
RUN IN SEPARATE CONDUIT FROM POWER WIRING.
MAX WIRE SIZE FOR TERMINAL IS #14AWG. USE
COPPER CONDUCTORS ONLY WITH TEMPERATURE
RATING 60°C OR HIGHER. TIGHTENING TORQUE 4 LB-
IN.
10) MAXIMUM TOTAL SENSOR DRAW IS 2 AMPS. IF
GREATER THAN 2 AMPS IS REQUIRED CUSTOMER
SUPPLIED POWER SUPPLY IS REQUIRED. CONSULT
MANUFACTURER FOR DETAILS.
11) MAX WIRE SIZE FOR I/O BOARD TERMINAL IS
#12AWG. USE COPPER CONDUCTORS ONLY WITH
TEMPERATURE RATING 60°C OR HIGHER. TIGHTEN-
ING TORQUE 4 LB-IN MAXIMUM CURRENT FOR FORM
C RELAY IS 4 AMPS MAXIMUM CURRENT FOR SOLID
STATE OUTPUT MODULE IS 1.5 AMPS.
12) DRAWING IS SHOWN WITH INTERNALLY SUPPLIED
POWER ALTHOUGH IT IS CONFIGURABLE TO CUS-
TOMER SUPPLIED POWER.
13) 120 VAC OUTPUTS MAX. LOAD: 1.5 AM RUNNING,
30 AMPS INRUSH.
14) MAX WIRE SIZE FOR INPUT POWER TERMINAL IS
#10AWG. USE COPPER CONDUCTORS ONLY WITH
TEMPERATURE RATING 60°C OR HIGHER. TIGHTEN-
ING TORQUE 4.4-5.3 LB-IN.
15) CABLE FOR COMMUNICATION BETWEEN PANELS
OR COMPUTER IS BELDEN #9843, OR EQUIVALENT. 24
AWG, 6 CONDUCTOR, TWISTED PAIR SHIELDED WITH
DRAIN WIRE, RUN IN SEPARATE CONDUIT FROM
POWER WIRING.

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Chapter 1 General Operating Procedures
Definitions
Cursor is a field indicator used on data entry screens. There are four possible cursor types:
* represents a number field input
> represents a selectable field
“ represents a string field
X represents a hexadecimal field
The cursor shows the user which fields are changeable on a data entry screen.
DisplayArea is the part of the LCD display that shows system information. The display area will
vary in size depending on whether a large character or small character screen is being viewed.
Fields are places where the user enters control parameters.
Highlight is when the letters appear light on a dark background instead of dark on a light back-
ground. The highlighted area may flash from light to dark to stress its importance and to gain the
user’s immediate attention.
Hot Keys are the top-level system functions and menus. The hot keys are located in a column to the
left of the Display area.
Large Character Screens are screens that use large, double high characters and also contain the
title banner and hot keys.
Main Status Screen is a large character status screen, which is considered the main system status
screen. This screen will also contain the alarm status, mode, and state of the system.
Parameter is a system control value, which is displayed by the system or input by the user.
Examples are suction pressure and high suction pressure alarm setpoint.
Screen is a method of displaying information to the user. The system contains eight types of
possible screens: menu screens, data entry screens, status screens, confirmation screens, momen-
tary screens, information screens, access screens, and log screens
Small Character Screens utilize the entire LCD display and use small characters to show system
information. These screens do not display the system hot keys.
Toggle is the process of moving from one selectable choice to the next by using the ENTER key.
User is an individual or group of individuals who will use the system.Auser is identified by a user
number ranging from 1 to 10. The user may also be referred to as the operator in this document.

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KeypadFunctions
The following is a brief summary of the Viltech keypad along with a description of its individual keys. Below
is a drawing of the Viltech keypad layout.
Keypad Diagram