Precision Digital Corporation NOVA PD570 Series User manual

LIMIT CONTROLLER
®
NOVA PD570 Series
Instruction Manual
PD570 & PD578
PRECISION DIGITAL CORPORATION
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Disclaimer
The information contained in this document is subject to change without notice.
Precision Digital Corporation makes no representations or warranties with
respect to the contents hereof, and specifically disclaims any implied warranties
of merchantability or fitness for a particular purpose.
Registered Trademarks
MODBUS®is a registered trademark of Schneider Automation Inc. All other
trademarks mentioned in this document are the property of their respective
owners.
©2009-2015 Precision Digital Corporation. All rights reserved.
Nova PD570 Series Model Number Guide
Options
10 = 1 alarm relay
14 = 1 alarm relay & RS-485
Main Control Output
A = 1 latching relay & 1 analog
output
0-6RA-10PD57
Limit Controller
Size - DIN Cutout
0 = 1/16 DIN
8 = 1/4 DIN
Power
6 = 100-240 VAC
Display
R = Red LED
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1. Safety Guide and Specifications 5
2. Front Panel Buttons and LED Indicators 11
5. Controller Parameter Setup
12
5.1 Input Group (G.IN) 14
5.2 Control Group (G.CTL) 18
5.5 Communication Group (G.COM) 27
3. Parameter Map
14
6. Error Display and Correction 29
7. Installation 30
7.1 Dimensions and Panel Cutouts
7.2 Panel Mounting 32
7.3 Power Cable Specification 33
7.4 Terminal Specification 33
7.5 Terminal Assignment, Connections, and Ratings 34
30
4. Operation Flow Chart 13
5.3 Alarm Group (G.ALM) 23
5.4 Retransmission Group (G.RET) 26
Table of Contents
1.1 Specifications 7
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7.7 Signal Input Connection
7.8 Retransmission Output Connection (RET) 37
7.9 Relay Output Connection (RELAY) 37
7.10 Use of an External Relay 38
7.11 Communication Wiring (RS485) 39
36
7.6 Grounding and Power Cable Connection 36
Table 1: Universal Input Selection 14
Table 2: Alarm Selection 24
Fig 2: Bias Formula Calculation 16
Fig 3: Operation of Limit Functions with O.ACT set to REV 19
Fig 4: Operation of Limit Functions with O.ACT set to FWD 19
Fig 5: Example of Limit Control Relay Operation and Reset Function 20
Fig 6: Alarm Operation 24
Fig 1: Temperature Bias 16
Table of D-Registers 40
Appendix
Tables and Figures
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1. Safety Guide and Specifications
Precautions Regarding This Instruction Manual
(1)This manual must be kept in the possession of theend userand in a suitable place for the operator to
study and to check the functions of the product.
(2)The installer and operator should carefully study and understand how to operate this product before use.
(3)This manual describes the functions of the product. Precision Digital Corporation does not guarantee
that the functions will suit a particular purpose.
(4)The contents of this manual have been reviewed for accuracyand correctness. However,should any
errors or omissions come to the attention of the user, contact technical support as listed on the backof this
manual
!
CAUTION
Safety Procedures and Unauthorized Modification Warning
(1)In order to protect this product and the system controlled by it against damage and ensure itssafe use,
make certain that all of the safety instructions and precautions in this manual arestrictly adhered to.
(2)Precision Digital Corporation does not guarantee safety if the products are not handled in accordance
with this instruction manual.
(3) If separate protection or safety circuits are to be installed in the system which is controlledbythis product,
ensure that such circuits are installed external to this product.
(4)Do not make modifications or additions internallyto the product. It may cause personal injury to the user or
damage to the product.
(5)Contact technical support as listed on the back of the manual for warranty and repairissues.
(6)Exposure to excessive moisture, electrical overloads, or mechanical vibration may damage the product.
!
CAUTION
Limited Liability
Precision Digital Corporation assumes no liability to any party for any loss or damage, direct or indirect,
caused by the use of or any unpredictable defect of the product.
!
CAUTION
The following safety symbols are used in this manual
(1) This symbol notifies the user of specific information relating to the safe operation of the controller.
Information noted with this symbol must be observed to protect the user from injuryand to prevent damage
to the product.
(A) For User: Be aware of this markinginthe manual and refer to the explanation in the manual to
prevent injury and damage.
(2) For Installer: Study the warnings marked to prevent injury and damage.
(2) Functional earth terminal: This symbol indicates that the terminal must be connected to ground.
(3) This symbol indicates additional information on the features of the product.
(4) This symbol directs the reader to further information on the current topic.
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NOTE
&
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CAUTION
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!
CAUTION
Controller Mounting Precautions
Keep the input circuit wiring as far as possible away from power and ground circuits.
Keep the units in 10 to 50ºC (50 to 110ºF) with 20% to 90% relative humidity (RH).
The controller may need a warm up period to return to operating temperature ranges when below 10ºC.
To prevent electric shock, be sure to turn off the power source and circuit breaker before wiring.
The power requirements are 100 to 240 VAC, 50/60 Hz, 10 VA max. Do not switch power
supplies without first disconnecting the power supply.
Follow the operating procedures and precautions in the manual to avoid fire, shock, damage to the unit,
or injury. Follow the operations and mounting directions indicated in this manual.
Always create a ground connection where indicated, however do not ground to gas pipes,
water pipes, lightening rods, or other potentially hazardous metal objects.
Do not apply power to the unit until all connections have been made.
Do not cover the venting holes in the rear of the unit.
!
CAUTION
Operational Environment Precautions
(1)Only operate the controller when it is properly installed.
(2)When installing the controller, select a location where:
Rear terminals are protected from accidental contact.
Mechanical vibrations are minimal.
No corrosive gas is present.
Temperature fluctuation is minimal.
Temperature can be maintained between 10 and 50 ºC (50 and 110ºF) with 20 to 90% RH.
No direct heat radiation is present.
High levels of electromagnetic interference are not present
The unit is not exposed to water.
No flammable materials are present.
Dust particles are not present in the air.
Exposure to ultraviolet rays is minimal.
Openings on the rear of the controller are not blocked.
(3)This unit is suitable for installation in an enviornment classified as Pollution Degree 2.
(4)This unit is designated as Installation CategoryII.
(5)If the equipment is used in a manner not specified by the manufacturer, the protection provided by
the equipment maybe impaired.
(6)A switch or circuit-breaker acting as the disconnect device shall be included in the application or the
installation.
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1.1 SPECIFICATIONS
General
DISPLAY Dual 4 digits, red LED, -1999 to 9999
DIN Sizes PV Display SP Display Weight
mm (inch) mm (inch) g (oz)
1/16 11.3 (0.45) 9.5 (0.37) 198 (7.0)
1/4 20.5 (0.81) 11.0 (0.43) 389 (13.7)
FRONT PANEL 1/16 DIN: IP65; 1/4 DIN: IP55
SAMPLINGTIME 250 ms
OVERRANGE Over range PV reads ovR, under range PV reads -ovR
PROGRAMMING Four front panel buttons and Modbus
METHODS
NOISEFILTER Programmable from 1 to 120
CALIBRATION All ranges are calibrated at the factory
MAX/MIN Max/min readings reached by the process are stored until
DISPLAY limit reset or until power to the controller is turned off.
OVERLIMIT Time since the last PV over limit occurnace is stored until the
TIMER system is reset by the user or until power to the controller is
turned off.
PASSWORD Programmable password restricts modification of
programmed settings
POWER 100-240 VAC, 50/60 HZ, 10 Watts
FUSE Required fuse: UL Recognized, 1 A, 250 V, slow blow
ISOLATION 2300 V input-to-output-to-power line;
4 kV relay output-to-input/output/power line
ENVIRONMENTAL Operating temperature range: 10ºC to 50ºC (50ºF to 110ºF)
Relative humidity: 20 to 90% non-condensing
MOUNTING 1/16 or 1/4 DIN size cutout required
Two panel mounting bracket assemblies provided for PD578
One one-piece bracket provided for the PD570
WARRANTY Three years parts and labor
Except where noted all specifications apply to operation at 23ºC.
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K1 -200 to 1370 -300 to 2500
K2 -199.9 to 999.9 0 to 2300 > 0°C : ±0.1% FS ±1 digit
J -199.9 to 999.9 -300 to 2300 < 0°C : ±0.2% FS ±1 digit
T -199.9 to 400.0 -300 to 750
B 0 to 1800 32 to 3300 > 400°C : ±0.15% FS ±1 digit
< 400°C : ±5% FS ±1 digit
R 0 to 1700 32 to 3100 ±0.15% FS ±1 digit
Thermocouple S 0 to1700 32 to 3100
E -199.9 to 999.9 -300 to 1800 > 0°C : ±0.1% FS ±1 digit
L -199.9 to 900.0 -300 to 1600 < 0°C : ±0.2% FS ±1 digit
U -199.9 to 400.0 -300 to 750
N -200 to 1300 -300 to 2400 > 0°C : ±0.1% FS ±1 digit
< 0°C : ±0.25% FS ±1 digit
W 0 to 2300 32 to 4200 ±0.2% FS ±1 digit
Platinel II 0 to 1390 32 to 2500 ±0.1% FS ±1 digit
PtA -199.9 to 850.0 -300 to 1560 ±0.1% FS ±1 digit**
PtB -199.9 to 500.0 -199.9 to 999.9
RTD PtC -19.99 to 99.99 -4.0 to 212.0 ±0.2% FS ±1 digit
JPtA -199.9 to 500.0 -199.9 to 999.9 ±0.1% FS ±1 digit**
JPtB -150.0 to 150.0 -199.9 to 300.0
0.4 to 2.0 V ±0.1% FS ±1 digit
1 to 5 V
Process 0to 10V
-10 to 20 mV
0 to 100 mV
0.400 to 2.000
1.000 to 5.000
0.00 to 10.00
-10.00 to 20.00
0.0 to 100.0
Temp Temp
Range (ºC) Range (ºF) Accuracy*
Input Type
UNIVERSAL INPUT TYPE AND ACCURACY
*Performance within recommended operating conditions (10 to 50°C, 20 to 90% RH)
**For a range scale of 0 to 100°C: +0.3°C +1 digit, and for a range scale of -100 to 100°C: +0.5°C +1 digit
Process and Temperature Inputs
TEMPERATUREDRIFT Refer to accuracy specifications below
DECIMALPOINT Up to three decimal places for process inputs:
9.999, 99.99, 999.9, or 9999
REAR JUNCTION Automatic or off settings for temperature inputs. No user
COMPENSATION calibration required.
OFFSETADJUSTMENT Four programmable input bias zones
SENSORBREAK Open sensor indicated by PV display flashing S.OPN.
DETECTION Up or down scale, user selectable; relays will follow the up
or down scale selection.
TRANSMITTER 14 to 18 VDC @ 20 mA; available at terminals OUT2 or
SUPPLY OUT3, instead of a retransmitting analog output
Display range can be scaled between -1999 and 9999.
4 to 20 mA Input
To accept a 4 to 20 mA signal, select 0.4 to 2.0 VDC input
and connect a 100 Ωresistor across the input terminals.
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Relay Outputs
RATINGS Out1: 250 VAC @ 3 A or 30 VDC @ 3 A (resistive load)
Alarm: 250 VAC @ 1 A or 30 VDC @ 1 A (resistive load)
ELECTRICALNOISE A suppressor (snubber) should be connected to each
SUPPRESSION relay contact switching inductive loads, to prevent
disruption to the microprocessor's operation.
Recommended suppressor value: 0.1 μF/470 Ω,
250 VAC (PDX6901)
DEADBAND For alarm operations, 0-100% of full scale, user selectable
HIGH ORLOW User may program the alarm relay for high or low trip point
ALARM
DEVIATION ALARM User may program the alarm relay for a high, low, or range
set point deivation alarm.
RELAYOPERATION Out 1, the Limit Control Relay, will activate when the PV
exceeds the limit set point. It will remain in this state until the
PV no longer exceeds the limit set point and the relay is reset
by the user. The alarm relay may be set to any alarm type.
TIME DELAY 0 to 99 minutes 59 seconds alarm trip delay for each alarm.
FAIL-SAFE Programmable
OPERATION Independent for each alarm relay
AUTO INITIALIZATION When power is applied to the controller, alarm relays will
reflect the state of the input to the controller except standby
alarms.
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Retransmitting Output
OUTPUTRANGE Retransmitting: 4 to 20 mA (600 Ω maximum)
SCALINGRANGE Any display range (see range for the input selected)
ACCURACY +0.1% of full scale
Serial Communications
PROTOCOLS Modbus (ASCII, RTU), PC software,
UNITADDRESS 1 to 99 (Max 31 units connected)
BAUD RATE 600, 1200, 2400, 4800, 9600, 19200 bps, user selectable
RESPONSETIME 0 to 100 ms delay response time
10 ms increments user selectable
DATA 7 or 8 bit user selectable
PARITY None, even, or odd
Approvals
ULRECOGNIZED USA and Canada
Process Control Equipment
UL FILE NUMBER E244207
CE COMPLIANT
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2. Front Panel Buttons and LED Indicators
KEY Function
Pressing SET/ENT key for at least 3 seconds switches between the operating display and
the parameter setting display. This key is used to verify and bypass parametersettings
when in the parametergroup display.
Used to change the value of digits when setting parameters.
Used to move between parameter groups.
Used to move to the next digit when setting parameters.
Holding for 3 seconds will reset the limit control latching relay if it is not in an over limit
condition. This will reset the time, maximum, and minimum display values.
S/ T
(UP/DOWN)
W(SHIFT)
WRST
SET/ENT
(ENTER)
LED Function
OVER
OUT
ALM
LED activated when the PV value is higher than the limit setting if HI.LO is set to HI.
LED activated when the PV value is lower than the limit setting if HI.LO is set to LOW.
LED on while the latching relay is de-energized (when in over limit conditions for
reverse/failsafe mode).
LED on when the alarm relay energizes.
Control Keys
LED Display
ALMOVER OUT
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3. Parameter Map
SP
HI.LO
R.MD
O.ACT
R.HYS
SPRH
SPRL
G.CTL
: Optional feature
IN-T
IN-U
IN.RH
IN.RL
G.IN
IN.DP
IN.SH
IN.SL
IN.FL
BSP1
BSP2
BSP3
BS0
BS1
BS2
BS3
BS4
G.ALM
RET
RETH
RETL
G.RET
COM.P
BAUD
PRTY
SBIT
DLEN
ADDR
RP.TM
G.COM A
BSL
RSL
SET/ENT SET/ENT SET/ENT SET/ENT SET/ENT
LOCK
U.PWD
TMU
INIT
ALT1
AL-1
AL1.H
AL1.L
A1DB
A1DY
ST ST ST ST T
PWD
A
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NOTE
PwD:Lockout Password
Use the ST arrows to enter the
password and press the SET/ENT
key. The default password is 0.
SET/
ENT
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4. Operation Flow Chart
Operation Display
Power On
Group Display
note 1:Initial display at startup.
note 2:Output status for the latching relay.
note 3:The time that has passed since the PVlast went over limit.
note 4:Highest PV value. Used only when HI.LO parameter is set to HIGH.
note5:Lowest PV. Used only when HI.LO parameter is set to Low.
When setting unit parameters,
G.IN should be set up prior to
any other parameters.
ENT 3 Sec
ENT
ENT
ENT
PV Value
SP Value
ENT PWD
(note1)
OUT
ON/OFF
TIME
**.**
HI
**.**
LO
**.**
G.CTL
G.IN
ENT key for
3 seconds or
no keystroke
for 60 sec
(note2)
(note3)
(note4)
(note5)
Sor T
T
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5. Controller Parameter Setup
5.1 Input Group (G.IN)
Press SET/ENT keyto select input group. Press press Sor Tkey to cycle through
groups as shown below. (Refer to parameter map in section3.)
This parameter selects the type of input sensor used. Its default setting is type TC.K1.
Refer to the following table showing the type of sensor inputs and select the desired input
type.
!
CAUTION
PV
PV
Input group parameters should be established first, as changes to the input type mayresetother
parameter settings in other groups to their default value.
display range : -5% to 105%
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
TYPE
K1
K2
J
E
T
R
B
S
L
N
U
W
Platinel II
PtA
PtB
PtC
JPtA
JPtB
0.4 to 2.0V
1 to 5V
0 to 10V
-10 to 20mV
0 to 100mV
Temp.Range(ºC)
-200 to 1370
-199.9 to 999.9
-199.9 to 999.9
-199.9 to 999.9
-199.9 to 400.0
0 to 1700
0 to 1800
0 to 1700
-199.9 to 900.0
-200 to 1300
-199.9 to 400.0
0 to 2300
0 to1390
-199.9 to 850.0
-199.9 to 500.0
-19.99 to 99.99
-150.0 to 150.0
-199.9 to 500.0
Temp.Range(ºF)
-300 to 2500
0 to 2300
-300 to 2300
-300 to 1800
-300 to 750
32 to 3100
32 to 3300
32 to 3100
-300 to 1600
-300 to 2400
-300 to 750
32 to 4200
32 to 2500
-300 to 1560
-199.9 to 999.9
-4.0 to 212.0
-199.9 to 999.9
-199.9 to 300.0
0.400 to 2.000V
1.000 to 5.000V
0.00 to 10.00V
-10.00 to 20.00mV
0.0 to 100.0mV
Group
Thermocouple
RTD
(0.00385)
RTD
(0.00392)
VDC
mVDC
DISP
Table 1:Universal Input Selection
G.IN
In-t
PWD QG.CTL QG.IN
KR
G.COM QG.RET QG.ALM
ST ST
ST ST
STT
4-20 mA Input Selection:
To accept a 4-20 mA signal, select 0.4 to 2.0 VDC input and connect a 100 Ωresistor across the input terminals.
?
NOTE
TC.J
TC.E
TC.T
TC.R
TC.B
TC.S
TC.L
TC.N
TC.U
TC.y
TC.PL
PTA
PTB
PTC
JPTA
JPTB
2v
5v
10v
20Nv
100n
n
-
1
TC.t1
1
TC.t2
-
-
-
--
-
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This parameter sets the display temperature unit for ºC or ºF.
Its default selection is ºC.
Refer to Table 1 whenchanging the temperature unit for the temperature input range.
This parameter sets the high limit of the temperature display range (maximum temperature
displayed). For mV and V inputs, this sets the value of the high input of the input scale
defined in In.SH.
This parameter sets the low limit of the temperature display range (minimum temperature
displayed). For mV and V inputs, this sets the low input of the input scale defined in In.SL.
This parameter sets the position of the decimal point for mV or V inputs. The position of
the decimal point can be set as 9999, 999.9, 99.99, or 9.999. Its default set value is 1.
This parameter sets the high limit of the mV or V display scale. This value will be
displayed when the input is set to the high input established in In.rH.
Its default value is 100.0.
This parameter sets the low limit of the mV or V display scale. This value will be displayed
when the input is set to the low input established in In.rL.
Its default value is 0.0.
This parameter sets the PV filter for stabilization from electromagnetic noiseand
interference. This will effect the rate of change of the PV displayvalue. Its default setting
is OFF, and can be set from 1 to 120 seconds.
This parameter to establishes PV behavior when an open input sensor is detected. When
BSL is set to UP, the PV operates as if at the high input range. When BSL is set to
DOWN, the PV operates as if at the low input range. Its default setting is UP. In the case
of mV or V inputs, the default setting is OFF. An open sensor check isnot performed in 10
V, 20 mV, or 100 mV input settings.
PV
This parameter determines if RJC for thermocouple inputs is used. RJC can be turned
on or off. Its default setting is ON.
This parameter sets where the PV bias points occur. See Fig 1 and Fig 2 for further
information about input bias operation.
This parameter sets the bias value at the corresponding bias point input values. These
parameters establish the value of the offset at each of the defined BSP1 -BSP3 points.
See Fig 1 and Fig 2 for further information about input bias operation.
PV
PV
PV
PV
PV
PV
PV
PV
.
.
.
PV
PV
.
.
.
PV
PV
IN-U
IN.RH
IN.RL
IN.DP
IN.SH
IN.SL
IN.FL
BSL
RSL
BSP1
BSP3
BS0
BS4
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+10ºC
+1ºC
-2ºC
The original temperature is shown within the range of 0ºC (Range Low) and 100ºC (Range High).
Bias points have been used to adjust the displayed temperature as shown in the graph in Fig1.
To establish this bias, the settings are shown below.
Temperature Bias Value (BS0 through BS4) = Temperature After Bias - Actual Temperature
Display temperature after bias at 600ºC actual temperature = P
Fig 2: Bias Formula Calculation
Original
Temperature
Temperature After Bias
0ºC = BS0
10ºC = BS1
10ºC = BS2
50ºC = BS3
0ºC = BS4
BSP1 BSP2 BSP3RL RH
Original
Temp
Fig 1: Temperature Bias
0ºC = BS0
RL BSP3 RHBSP1 BSP2
Original Temperature
Temperature
After Bias
BS4
75ºC0ºC 25ºC 50ºC 100ºC
-3ºC = BS3
-2ºC = BS1
+1ºC = BS2
0ºC = BS4
-3ºC
Example 1:
Temperature Settings to Establish Where the Bias Occurs
RL BSP1 BSP2 BSP3 RH
0ºC 25ºC 50ºC 75ºC 100ºC
Bias Offset for Each Point
BS0 BS1 BS2 BS3 BS4
0ºC -2ºC +1ºC -3ºC 0ºC
P = 600 + (600 - BPS2) x BSP3 - BSP2
BS3 - BS2 + BS2
Example 2:
600ºC -
100ºC0ºC 500ºC 800ºC 1000ºC
+10ºC +PºC
+50ºC
P = 600 + (600 - 500) x 800 - 500
50 - 10 + 10 = 623ºC Temperature After Bias
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?
NOTE
Display Parameter Setting Range Unit Default Remark
IN.SL
IN.FL
BSL
RSL
BSP1
BSP2
BSP3
BS0
BS1
BS2
BS3
BS4
Min Input
Value Scale 0.0 mV, V
PV Filter OFF, 1 to 120 sec OFF
Open Sensor
Behavior OFF, UP, DOWN ABS UP Not Used for
VDC input
RJC Operation ON, OFF ABS ON Only Used for
TC Input
Reference Bias
Point 1 AEU (0.0 to 100.0%),
RL≤BSP1≤BSP2≤BSP3≤RH AEU AEU
(100.0%)
Reference Bias
Point 2 AEU (0.0 to 100.0%),
RL≤BSP1≤BSP2≤BSP3≤RH AEU AEU
(100.0%)
Reference Bias
Point 3 AEU (0.0 to 100.0%),
RL≤BSP1≤BSP2≤BSP3≤RH AEU AEU
(100.0%)
Bias Value for RL
Point GEU (-100.0 to 100.0%) GEU 0
Bias Value at
BSP1 GEU (-100.0 to 100.0%) GEU 0
Bias Value at
BSP2 GEU (-100.0 to 100.0%) GEU 0
Bias Value at
BSP3 GEU (-100.0 to 100.0%) GEU 0
Bias Value
at RH GEU (-100.0 to 100.0%) GEU 0
IN-T
IN-U
IN.RH
IN.RL
IN.DP
IN.SH
Input Type Refer to Table 1: Universal Input Selection ABS TC.K1
Display Unit ºC / ºF ABS ºC T/C, RTD
Max PV
Display Range Within sensor input range
Refer to Table 1
INRH > INRL
AEU 1370
Min PV
Display Range AEU -200
Decimal Point
Position 0, 1, 2, or 3 ABS 1mV, V
Max Input
Value Scale -1999 to 9999
INSH > INSL
Decimal position determined by IN.DP ABS 100.0 mV, V
There are two types of engineering units values used in the setting of parameters, absolute
engineering units (AEU) and general engineering units (GEU). An AEU parameter is set using an
absolute value engineering unit that represents a specific point, such as a specific temperature or
voltage level. An GEU parameter is set using engineering units, however it is a general value, and not
tied to any input or output level.
For example: When establishing input bias, parameter BSP1 setsthe specific PV valuewhere bias
point one will occur. This parameter has a unit designation of AEU. BS1, the amount of offset at BSP1
is set in engineering units, however this parameter occurs at whatever BSP1 is set to, and therefore
does not have an absolute settingrelated to any input or output, it is just the amount of offset at where
BSP1 occurs. While one is related to an absolute input value, and the other stand alone value, both are
set as engineering units, such as BSP1 set as 100ºC and BS1 set as 3ºC.
Input Group Parameter Summary
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This parameter establishes the set point for limit operation. This is the value set as the
operating limit that will trigger the latching limit control relay. The parameter HI.LO sets if
this is a high limit or a low limit.
5.2 Control Group (G.CTL)
Press SET/ENT key to select control group. (Refer to parameter map in section 3.)
PV
This parameter established the set point as a high or low limit value. If set as a high limit,
the unit will consider the input beyond the set limit when PV > SP. If set as a low limit, the
unit will consider the input beyond the setlimit when PV <SP.
This parameter determines the status of the latching relay (OUT1) when the unit is turned
on. If R.MD is set as ON, the output condition will be a function the PV and SP as normal.
If OFF, the output will enter over limit condition until reset. To set the condition of the relay
in normal and over limit conditions, refer to parameter O.ACT below.
PV
PV
PV
Turning ON this parameter locks all other settings from being changed. This applies to
the operation display functions, such as changing the set point, as well as setting group
parameters. The default setting is OFF.
This parameter establishes the password for the controller. This password must be
entered at the PWD screen before accessing the control group (G.CTL) or it will not
access the setting groups after the PWD prompt. The default setting is "0". See the
parameter map in section 3 for the location of the PWD prompt in the group menus.
PV
PV
Be sure not to forget the password once it has been set. If the passwordisforgotten, contact
technical support as listed on the backof this manual.
!
CAUTION
This parameter sets the operation for the limit control latching relay(OUT1). In reverse
(failsafe) operation, the control relay is energized duringnormal conditions. In forward
operation, the control relay is energized during over limit conditions. The default setting is
REV. See Fig 3 and 4 for a illustration showing reverse and forward operation.
PV
This parameter sets a high limit on what the set points can be programmed or changedto.
This value may reset if the type of input is changed, or if parameter IN.RH or IN.RL
(IN. SH or IN.SL if input type is mV or V) is changed.
This parameter sets a low limit on what the set points can be programmed or changed to.
This value may reset if the type of input is changed, or if parameter IN.RH or IN.RL
(IN. SH or IN.SL if input type is mV or V) are changed.
PV
PV
This parameter sets the hysteresis for the limit control. When returned within the limit
range after being over the set limit, this is an additional amount below the limit that the PV
must reach before the latching relay can be reset and the OVER LED turns off.
PV
PWD QG.CTL QG.IN
KR
G.COM QG.RET QG.ALM
ST ST
ST ST
STT
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5-2-1 Limit Control Features and Operations
The following illustration shows how each aspect of the limit control functions behave under over limit circumstances.
1. Power supplied to the controller. The OUT LED turns on.
2. The PV surpasses the SP. The OUT LED turns on. the OVER LED turns on. The latching limit control relay de-
energizes. The time begins being recorded.
3. The PV falls below the limit and hysteresis levels. The OVER LED turns off. The time count stops.
4. The PV surpasses the SP. The OVER LED turns on. The time count resets and begins again.
5. The PV falls below the limit and hysteresis levels. the OVER LED turns off. The time count stops.
When the rest button is pressed for 3 seconds, and the PV is below the SP, the OUT LED will turn off, and the limitcontrol
relay will energize.
SP
PV
OUT
LED
Limit
Control
Relay
OVER
LED
Time
Count
Power
to Unit
Reset
Pressed
Time Reset by User
1
5-2-1-1 Operation of Limit Functions when O.ACT = REV, HI.LO = HIGH, R.MD = OFF
Fig 3: Operation of Limit Functions with O.ACT set to REV
This parameter resets most parameters to their factory settings. To reset the controller,
set this parameter to ON. After reset, it will return to the OFF setting.
PV
This parameter sets the time units the controller uses for parameters with time
components. This can be set to the format of HH.MM (hours.minutes) or MM.SS
(minutes.seconds). Its default setting is HH.MM.
Most parameters will be reset to their default settings when the controller is initialized. Note the
current settings before this is done so they can easily be restored after controller initialization.
!
CAUTION
PV
2 3 4 5
Reset
Pressed
(not accepted) Reset
Pressed
HYS
ON
OFF
ON
OFF
ON
OFF
ON
OFF
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SP
PV
Time Resetby
User
5-2-1-2 Operation of Limit Functions when O.ACT = FWD, HI.LO = HIGH, R.MD = OFF
Fig 4: Operation of Limit Functions with O.ACT set to FWD
HYS
The following illustration shows how each aspect of the limit control functions behave under over limit circumstances when
O.ACT is set to FWD operation.
1. Power supplied to the controller. The limit control relay energizes.
2. The PV surpasses the SP. The OUT LED turns off. the OVER LED turns on. The latching limit control relay energizes.
The time begins being recorded.
3. The PV falls below the limit and hysteresis levels. The OVER LED turns off. The time countstops.
4. The PV surpasses the SP. The OVER LED turns on. The time count resets and begins again.
5. The PV falls below the limit and hysteresis levels. the OVER LED turns off. The time count stops.
When the rest button is pressed for 3 seconds, and the PV is below the SP, the OUT LED will turnon, and the limitcontrol
relay will turn off.
OUT
LED
Limit
Control
Relay
OVER
LED
Time
Count
Power
to Unit
Reset
Pressed
ON
OFF
ON
OFF
ON
OFF
ON
OFF
2 3 4 5
Reset
Pressed
Reset
Pressed
(not accepted)
1
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