Zener MSC-3 User manual

MSC-3
Extended Features
Option
Instruction Manual
ZENER
R

IM00087B
ZENER TECHNOLOGY AND QUALITY ASSURANCE
Since 1976 Zener Electric has supplied many thousands of drives to industry. These drives have been
installed into numerous applications resulting in a wealth of in house experience. The Zener MSC-3
AC variable speed controller is the culmination of this experience, modern technology and industrial
application requirements. The Zener Quality Assurance program ensures that every MSC-3 manufactured
has proven to operate correctly in the production test bay before dispatch.
SAFETY
Your MSC-3 must be applied, installed and operated in a safe manner. It is the responsibility of the user to
ensure compliance with all regulations and practices covering the installation and wiring of your MSC-3.
The instruction manual should be completely read and understood before attempting to connect or
operate the MSC-3. Only skilled personnel should install this equipment.
This equipment contains a number of components that are designated by their various manufacturers
as “not for use in life support appliances, devices or systems where malfunction of the components can
reasonably be expected to result in personal injury or death”. Customers using or selling Zener products
for use in such applications do so at their own risk and agree to indemnify Zener for any damage resulting
from improper use or sale.
THE CONTENTS OF THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE
ZENER is a registered trademark of Zener Electric Pty Limited

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MSC-3 Extended Features Option Manual
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Contents
Explanation of symbols .............................................................................................................................1
Warnings .....................................................................................................................................................1
Receiving ....................................................................................................................................................2
Firmware .....................................................................................................................................................2
MSC-3 Extended Features Option Description ........................................................................................3
Thermal protection input ....................................................................................................................3
Analog input .......................................................................................................................................3
Transducer Power Supply ..................................................................................................................3
Analog output .....................................................................................................................................3
Digital inputs .......................................................................................................................................3
Relay Output .....................................................................................................................................3
User and Preset speed reference selection .......................................................................................3
PID Controller .....................................................................................................................................3
Installation ...................................................................................................................................................4
IP30 Chassis A Installation .................................................................................................................4
Installation ...................................................................................................................................................7
IP 66 Chassis A Installation and all other chassis ..............................................................................7
Extended Features Option Menus ............................................................................................................9
Control Console Menu .............................................................................................................................10
Option Defaults .........................................................................................................................................13
J00 OPN DEFAULTS .......................................................................................................................13
Thermal Protection Input .........................................................................................................................13
Analog Output ...........................................................................................................................................13
P01 Analog Opt ................................................................................................................................14
P02 Zero opt % ......................................................................................................................14
P03 Max opt % .......................................................................................................................15
P04 Min opt % ........................................................................................................................15
Analog Output Setup Checklist ...............................................................................................................15
Extended Features Option References ..................................................................................................16
P05 OPTION REFS .........................................................................................................................16
User Selectable References .................................................................................................16
P06 User Ref 1 ......................................................................................................................16
P07 User Ref 2 ......................................................................................................................16
Preset References .................................................................................................................16
P08 Preset 1 ..........................................................................................................................16
P09 Preset 2 ..........................................................................................................................16
P10 Preset 3 ..........................................................................................................................16
P11 Preset 4 ...........................................................................................................................16
P12 Preset 5 ..........................................................................................................................16
P13 Preset 6 ..........................................................................................................................16
Reference Selector ...................................................................................................................................17
P14 Ref Select .......................................................................................................................17
Reference Selector Setup Checklist .......................................................................................................17
Extended Features Option Digital Inputs ...............................................................................................18
P18 OP DIG IN 1 ..............................................................................................................................18
P19 OP DIG IN 2 ..............................................................................................................................18
P20 OP DIG IN 3 ..............................................................................................................................18
P21 OP DIG IN 4 ..............................................................................................................................18
Extended Features Option Analog Input ................................................................................................18
P22 Analog input ....................................................................................................................19
P23 Ref at 0% ........................................................................................................................19
P24 Ref at 100% ....................................................................................................................19
Analog Input Scaling ................................................................................................................................21

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PID CONTROLLER ....................................................................................................................................22
PID Structure.............................................................................................................................................22
PID Menu Structure ..................................................................................................................................23
P25 PID Control ...............................................................................................................................23
PID Speed Reference ...............................................................................................................................23
P38 PID output .................................................................................................................................23
PID Run Variable .......................................................................................................................................24
P38 PID Output ................................................................................................................................24
PID Digital Outputs ...................................................................................................................................24
P39 PV Over % ................................................................................................................................24
P40 PV Under % ..............................................................................................................................24
Extended Features Option Digital Output ..............................................................................................25
P41 Op Dig out .................................................................................................................................25
PID Control Wiring ....................................................................................................................................26
Setup Checklist and Tuning ....................................................................................................................27
Application Examples ..............................................................................................................................29
Application: Stair pressurisation fan with internal PID ......................................................................29
Application: Cooling tower fan with reverse acting internal PID .......................................................29
Application: Water pumping with automatic pressure control ...........................................................29
Application: Constant Pressure Water Pumping ..................................................................................30
Your MSC-3 Extended Features Option Setup Notes ............................................................................32
Specifications ...........................................................................................................................................33
Thermal Protection ...........................................................................................................................33
Analog input .....................................................................................................................................33
Tranducer Power Supply ..................................................................................................................33
Analog output ...................................................................................................................................33
Digital inputs .....................................................................................................................................33
Digital output ....................................................................................................................................33
Preset speeds ..................................................................................................................................33
PID controller ..................................................................................................................................33
PID Specifications ............................................................................................................................34
Display ...................................................................................................................................34
PID Inputs ..............................................................................................................................34
PID Outputs ...........................................................................................................................34
Digital Outputs .......................................................................................................................34
Alarms ....................................................................................................................................34
Proportional Band ..................................................................................................................34
Integral Time ..........................................................................................................................34
Derivative Time ......................................................................................................................34
Integrator clamp .....................................................................................................................34
Output clamp ..........................................................................................................................34
Resolution ..............................................................................................................................34
Accuracy ................................................................................................................................34
Sample time ...........................................................................................................................34
Glossary ....................................................................................................................................................35

IM00087B 1
Warnings
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Explanation of symbols
WARNING Indicates a condition or practice that, if the warning is not strictly
observed, could result in personal injury or death.
CAUTION
Indicates a condition or practice, if the caution is not strictly
observed, could lead to damage or destruction of equipment or a
significant impairment of proper operation.
WARNING This symbol is used to highlight an electrical hazard. Failure to
strictly observe the warning could result in electrocution.
iThis symbol is used to highlight additional information on
the product’s capabilities or a common error in installation,
commissioning or operation.
Warnings
Read all operating instructions before installing, wiring, operating, servicing or
inspecting the MSC-3.
This option manual should be read in conjunction with the MSC-3 instruction manual.
Ensure that both of the instruction manuals are made available to the final user of
the product as well as all personnel involved in any aspect of installation, adjustment
or maintenance.
Your MSC-3 must be applied and installed by a suitably qualified and experienced
electrical tradesperson in accordance with this manual, good engineering practice
and all local rules and regulations
There are hazardous voltages inside the MSC-3 whenever it is connected to an
electrical supply and for some time afterwards.
Before touching anything inside the MSC-3 enclosure or other equipment connected
to the MSC-3 terminals, disconnect all sources of electrical power, wait at least 11
minutes for capacitors within the MSC-3 to discharge to less than 50VDC and then
ensure, by measurement, that there is no hazardous AC or DC voltage present at
any terminal.
The MSC-3 contains high energy circuits that may be hazardous. Do not operate the MSC-3 with the door
open or any part of the enclosure removed.
Do not touch the terminals of the MSC-3 or any associated motor and wiring when it is energised, even if
the MSC-3 and motor are stopped. Electric shock may result.
Do not modify this equipment electrically, mechanically or otherwise. Modification may create safety
hazards as well as voiding the UL listing of models so listed.
The MSC-3 is designed to drive an appropriately rated and otherwise suitable 3 phase induction motor. It
is not suitable for single phase motors or other types of motor or non-motor load. Use with inappropriate
load types may create a safety hazard.
Where the MSC-3 is used as a component part of another product, it is the purchaser’s responsibility to
ensure that the final product meets all of the necessary safety, EMC, regulatory, operational and other
requirements for that product. Requirements for the purchaser’s final product may be substantially
different to the requirements for stand-alone inverters.
The MSC-3 is intended for use only in fixed wiring applications. It is not intended for use on a flexible
supply cable.

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The MSC-3 contains a substantial EMC line filter and as a result it is unsuitable for use on earth leakage
protected circuits.
Mount the MSC-3 on a vertical, incombustible surface such as metal or masonry. Do not place
combustible or flammable material near the MSC-3. Failure to observe these precautions may create a
fire hazard.
The MSC-3 is manufactured under strict quality control arrangements, however additional and
independent safety equipment must be installed if the application is such that failure of the product may
result in personal injury or property damage.
Ensure that electrical noise generated by the product and any associated equipment does not adversely
affect the proper operation of other equipment or systems, particularly those that have a safety function.
Install emergency stop circuitry that removes power from the MSC-3 and does not depend on any feature
of the product for proper and safe operation. Do not use the braking functions of the product for safety
purposes.
The MSC-3 has features that may be used to cause an automatic restart in certain circumstances. The
overall application (machine etc) must be designed such that automatic restart is not hazardous.
Do not install this equipment in locations where mechanical damage to the enclosure is possible. In
particular, consider vehicles, vandalism and attack by insects or animals. Severe equipment damage and
safety hazards may result.
Receiving
Inspect the MSC-3 for any shipping damage. If any damage is found, report it to the carrier immediately.
Access the inside of the controller and visually check for any damage.
Do not attempt to operate the MSC-3 if any obvious damage exists.
After the initial inspection, the MSC-3 can be repacked and stored in a clean, dry location until it is
required for use.
DO NOT store this equipment in an area where the ambient temperature will fall below -20ºC (-4ºF)
or rise above 70ºC (158ºF). DO NOT store this equipment in areas that are subject to condensation
or corrosive atmosphere. Proper storage is necessary to ensure satisfactory controller start up and
performance.
Firmware
This manual applies to MSC-3 Extended Features Option with firmware revision 1.19. The firmware
revision is marked on the back of the Extended Features Option.
This Extended Feature Option firmware revision is compatible with MSC-3 control board firmware
revisions 1.49 and up.

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MSC-3 Extended Features Option Description
The Extended Features Option extends the feature list of the MSC-3. Features include:
Thermal protection input
Standard motor protection thermistors may be directly connected to this input (see pages 13 and 26). A
separate thermistor protection relay is not required. Alternatively, other protection devices that present a
normally closed contact such as thermal overload relays and thermal switches may be used. The thermal
protection input requires no user set up and is active at all times except when MSC-3 is operating in the
Essential Services Override (ESO) mode.
Analog input
The input may be set for voltage or current input by on board DIP switch combinations (see pages 19
and 26). The analog input may be used as an additional speed reference or used in conjunction with the
built in PID controller as the process variable. When used with the PID controller, the analog input may
be rescaled through the menus of the MSC-3. A comparator function (under and over) is available on the
analog signal.
Transducer Power Supply
A 24V, 20mA power supply is provided to allow “loop powered” 4-20mA transducers to be used in
conjunction with the analog input without the need to have an external power supply for this purpose (see
page 26).
Analog output
The output may be set for voltage or current output by on board DIP switch combinations (see pages
13 and 26). This feature permits internal signals of the MSC-3 to be accessed by external monitoring
equipment such as panel meter displays, etc.. Signals available are: output frequency, motor speed,
relative motor load, DC link voltage, drive output power, drive output voltage, power circuit temperature,
motor thermal overload and the PID output signal.
Digital inputs
Four additional digital inputs are provided (see pages 18 and 26). The function of each input is user
selectable. These inputs may be assigned to any of the functions available to the MSC-3 Control Board
digital inputs as well as being used to control the reference selector function.
Relay Output
An additional relay output is provided (see pages 25 and 26). The function of the relay is user selectable
and may be assigned to any of the functions available for the relays on the MSC-3 Control Board. The
PID status functions PV Under and PV Over are also available.
User and Preset speed reference selection
The Extended Features Option has a speed reference selector where combinations of digital inputs
select up to 8 speed references: 2 user selectable reference sources (e.g. analog input, motorised
potentiometer) and 6 preset speeds. The reference selector function is controlled by three digital inputs
(see pages 11 and 16).
PID Controller
The in built PID controller function with anti-windup has been designed to integrate into the MSC-3 control
system with minimal user intervention (see page 22). The PID controller is tuned by changing parameters
through the MSC-3 menus and is able to use the reference selection capabilities as the set point or feed
forward reference.

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Installation
There are hazardous voltages inside MSC-3 whenever it is connected to an electrical
supply and for sometime afterwards.
Before touching anything inside the MSC-3 enclosure or other equipment connected
to the MSC-3 terminals, disconnect all sources of electrical power , wait at least 11
minutes for capacitors within MSC-3 to discharge to less than 50VDC and then ensure by
measurement, that there is no hazardous AC or DC voltage present at any terminal.
IP30 Chassis A Installation
1. Ensure all power sources have been removed for at least 11 minutes and that they remain that way
for the rest of the installation.
2. Remove the screw from the top of the enclosure.
3. Remove the bottom section of the MSC-3 blue plastic moulding to reveal the power terminals.
4. Remove the screw holding the control board/display assembly and pull it off the drive.
5. Turn the control board/display assembly over and plug the Extended Features Option into one of the
available option connectors.
6. Lay the insulation sheet on top off the exposed metal work and replace the control board/display/
option assembly.
7. Replace the original mounting screw and install the Extended Features Option mounting screw.
The Extended Features Option is ready for control wiring. Refer to the wiring diagram for wiring
examples.
8. Once control wiring is complete replace the bottom moulding.
9. When the MSC-3 is switched on, restore defaults for each new option fitted or existing options that
occupy an alternate connector. Refer to the J00 OPN DEFAULTS section on page 13 of this manual
for details.

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iSeveral different screw
types are used. take care
to replace all screws in
their original locations.
4
2
5
6
3
Display
Assembly
Control
Board
Extended
Features
Option
Insulation
Sheet
Bottom section - blue
plastic moulding.
IP30 Chassis A Installation

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2
3
4
5
iSeveral different screw
types are used. take care
to replace all screws in
their original locations. Display Assembly
In some models this is
attached by screws.
Control Board
Extended Features Option
Insulation Sheet
MSC-3 Chassis
Chassis A IP66 and all other
chassis installation

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Installation
There are hazardous voltages inside MSC-3 whenever it is connected to an electrical
supply and for sometime afterwards.
Before touching anything inside the MSC-3 enclosure or other equipment connected
to the MSC-3 terminals, disconnect all sources of electrical power , wait at least 11
minutes for capacitors within MSC-3 to discharge to less than 50VDC and then ensure by
measurement, that there is no hazardous AC or DC voltage present at any terminal.
IP 66 Chassis A Installation and all other chassis
1. Ensure all power sources have been removed for at least 11 minutes and that they remain that way
for the rest of the installation.
2. Open the front door, remove any screws securing the display assembly and lift it off.
3. Remove the screws securing the control board to the chassis and lift of the control board.
4. Turn the control board over and plug the Extended Features Option into one of the available option
connectors.
5. Lay the insulation sheet on top off the exposed metal work and replace the control board/option
assembly.
6. Replace the control board and display assembly and appropriate screws. The Extended Features
Option is ready for control wiring. Refer to the wiring diagram for wiring examples.
7. Once control wiring is complete close the front door.
8. When the MSC-3 is switched on, restore defaults for each new option fitted or existing options that
occupy an alternate connector. Refer to the J00 OPN DEFAULTS section on page 13 of this manual
for details.

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Intentionally blank

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Extended Features Option Menus
Refer to the MSC-3 Startup Section in the MSC-3 Instruction Manual for an explanation of the MSC-3
Menu System.
The menus of the MSC-3 are extended when Extended Features Options are fitted. The extensions are
the additional features that the option brings to the MSC-3. As there may be two of the same Extended
Features Options fitted, duplication of features occurs.
Appended to the code field of each option menu item is either an ’L’ for left hand side option or an
‘R’ for right hand side option. Use the ‘L’ or ‘R’ to identify each of the duplicated features.
For example, to restore factory defaults for the Extended Features Option installed on the left hand side,
the J00L OPN DEFAULTS menu item must be found.
iThe remainder of this manual will not use the ‘L’ or ‘R’ when describing menu items or
features as the MSC-3 Extended Features Option may be installed in either location.
The control console menu structure, with the Extended Features Option fitted is shown on the following
pages.

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ESC
A00 DISPLAY
A01 RUN VARIABLE
A02 RUN SCALE
A03 RUN UNITS
A04 MENU PROTECT
B00 MOTOR
V01 Hz*
V02 RPM
V03 %Load
V04 Amps
V05 Volts DC
V06 kW
V07 Volts AC
V08 Deg C
V09 Ripple
V10 I2T Used
P38R PID Output
A05 SET DEFAULTS
E09 A/R CLR TIME
C00 PERFORMANCE
E10 RESET BY PF
B01 MOTOR VOLTS
B02 MOTOR AMPS
B03 MOTOR Hz
B04 MOTOR RPM
C01 MIN Hz
C02 MAX Hz
C03 RAMP
C04 ACCEL TIME
C05 DECEL TIME
C06 S TIME
C07 FLUX PLUX%
C08 HI SPD FLUX+
C09 SLIP COMP
C11 AUDIBLE FREQ
D00 PROTECTION
D02 I2T
D01 CURRENT LIMIT
D03 12T ZERO Hz
D04 I2T CNR Hz
E00 STOP/START
D09 1 PHASE INPT
D08 DC INPUT
D05 REVERSE
E01 STOPPING
E06 DYNAMIC BRK
E08 A/Rs ALLOWED
E07 AUTO RESTART
Control Console Menu
The following pages show the structure of the control console menu.
C12 16kHz
C13 8kHz
C14 4kHz
C15 2 kHz*
C16 Auto Select
H00 ENABLE
H01 DISABLE*
E02 RAMP TO STOP*
E03 COAST
 Enter selects menu group (e.g. A00 DISPLAY) or parameter (e.g. V01 Hz)
▲(Up) or ▼(Down) moves within menu group or for adjustable parameters changes the parameter value
 Saves adjusted parameter value
ESC Ignores adjusted parameter value or retuns to previous menu level
Bold Italic Parameters on this page appear automatically on fitting the Extended Features Option card
* Indicates default setting e.g. default for A01 RUN VARIABLE is V01 Hz

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F00 REFERENCES
F01 REMOTE
F02 LOCAL
F03 ESO
G00 INPUT/OUTPUT
P41L OP DIG OUT
G01 TERMINAL CFG
G10 ENABLE/RESET
G11 DIG IN 1
G12 DIG IN 2
G14 DIG IN 4
G13 DIG IN 3
G15 RELAY 1
G16 RELAY 2
P01L ANALOG OPT
P18L OP DIG IN1
P19L OP DIG IN2
P20L OP DIG IN3
P21L OP DIG IN4
J00R OPTION DEFS
P05R OPTION REFS
P06L USER REF1
P12L PRESET 5%
P11L PRESET 4%
P10L PRESET 3%
P09L PRESET 2%
P08L PRESET 1%
P07LUSER REF2
P13LPRESET 6%
P25R PID CONTROL
P36LScaling
P35L PID Units
P34LFF Choice
P33L SV Choice
P32L -0 Clamp %
P31L +0 Clamp %
P30L -I Clamp %
P29L +I Clamp %
P28L Td (sec)
P27L TI (sec/r)
P26L PB%
R00 AN1
R01 REF AT 0%
R02 REF AT 100%
R03 PRESET %
R04 MOTORISED POT
R05 PERSISTENT
R06 RESET*
R07 CONSOLE REF
P22R Analogue Inpt
P23R REF AT 0%
P24R REF AT 100%
P14R Ref Select
K22 Coms Preset **
P37R Zero Ref
P38R PID Output
P14L Ref Select P15L Selector 1 P16L Selector 2 P17L Selector 3
P06L User Ref 1 Low Low Low
P07L User Ref 2 Low Low High
P08L Preset 1 Low High Low
P09L Preset 2 Low High High
P10L Preset 3 High Low Low
P11L Preset 4 High Low High
P12L Preset 5 High High Low
P13L Preset 6 High High High
Bold Italic Parameters on this page appear
automatically on fitting the Extended Features Option
e.g. P22R Analog Inpt is the analogue input of option
card fitted in the right slot, left slot would be P22L
Analog Inpt.
* Indicates default setting
** Any communications option card fitted
*** Quick setup configures individual terminals to
pre-assigned functions; configuration number is not
memorised.
F03 ESO
F06 ESO RAMP
F04 JOGFWD
F05 JOGREV
Quick Setup Selections***:
GO2 CONFIG 1 INDUSTRIAL*
G03 CONFIG 2 VSC2000
G04 CONFIG 3 HVAC
G05 CONFIG 4
G06 CONFIG 5
G07 CONFIG 6
G08 CONFIG 7
G09 CONFIG 8
Disable MSC-3 to change CONFIG
V01 Hz*
V02 RPM
V03 % of Load
V04 Amps
V05 Volts DC
V06 kW
V07 Volts AC
V08 Deg C
V09 Ripple
V10 I2T Used
P38R PID Output P02R ZERO OPT%
P04R MIN OPT%
P03R MAX OPT%
O00 RUN
O01 TRIP
O02 ESO
O03 PROOF
O04 ZERO SPEED
O05 AT SPEED
O06 UNDER SPEED%
O07 OVER SPEED%
O08 ON
O09 OUTPUT ALARM
O10 A/R FAIL
O11 FWD
O12 REV
O13 ENABLED
O14 I2T TRIP
O15 OVER TEMP
O16 LOAD WARNING
P39L PV OVER %
P40L PV UNDER %
I00 FWD&LATCH
I01 REV&LATCH
I02 STOP
I03 FWD
I04 REV
I05 UP
I06 DOWN
I07 RESET
I08 ESO
I09 JOGFWD
I10 JOGREV
I11 REMOTE
P15L SELECTOR 1
P16L SELECTOR 2
P17L SELECTOR 3

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A00 DISPLAY
Loops back to
start of menu
Additional menu items will appear here if
another option board is fitted.

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Option Defaults
J00 OPN DEFAULTS
Menu location: See page 11.
Use the up (▲) and down (▼) push buttons to find the J00 OPN DEFAULTS menu when the option
needs to be initialized to a known state.
IMPORTANT! Restoring factory defaults must be done when the option is commissioned. This is
necessary to ensure option settings are updated with connector position information for correct feature
identification and operation.
With J00 OPN DEFAULTS displayed, press Enter and the message J01 Check Option is displayed as
a reminder that unexpected behaviour may result due to existing wiring. Press Enter to restore factory
defaults.
If the J00 OPN DEFAULTS menu cannot be found the Extended Features Option may be initialized by
the following procedure:
1. Follow the installation procedure for disassembly details to access the Extended Features Option.
Remove the Extended Features Option and locate J1.
2. Ensure J1 is linked and reinstall the option as per the installation procedure.
3. Power the MSC-3 up for several seconds and then power it down. Wait at least 11 minutes for the
power capacitors inside the MSC-3 to discharge to less than 50 VDC. Refer to Hazardous Voltage
Warning on page 1. The link across J1 has to be removed. Follow the installation procedure for
disassembly details to access the Extended Features Option.
4. Locate J1 and remove the link and reinstall as per the installation procedure.
Thermal Protection Input
The Extended Features Option provides thermal protection through the TH+ and TH- terminals (see
page 26). To use the thermal input, remove the factory installed wire link and wire in its place the thermal
device leads. The MSC-3 will stop the motor and display the message OT THERM when the thermal
device activates or in the case of a thermistor when its resistance is greater than approximately 3300
Ohms.
The thermal protection input is a hardware feature that is always active and so does not require any user
setup. Thermal devices include thermistors, thermal switch, thermal overload.
Analog Output
A hardware component of Extended Features Option is a single isolated analog output (see page 26) that
is configurable for 0-5V, 0-10V, 0-20mA or 4-20mA by setting the DIP switch as shown.
Range Extended Features Option
SW1
3 4 5
0-5V off ON ON
0-10V ON off ON
0-20mA off off off
4-20mA** off off off
** See P02 Zero opt % and P04 Min opt % to specify 4 mA offset.
Several settings contribute to the analog output configuration. They are P01 Analog Opt, P02 Zero
opt %, P03 Max opt %. and P04 Min opt %. The MSC-3 will display the present settings each time the
analog output menu is entered. The following graph shows how these values affect output scaling

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Output
signal
Input
signal
P03 Max opt %
P02 Zero opt %
P04 Min opt %
100%
0%
P01 Analog Opt
Default value: V01 Hz
Menu location: The G00 INPUT/OUTPUT menu
Choose from:
Signal Comment 0 Output Full Scale Output
V01 Hz Output frequency 0 MAX Hz
V02 rpm Motor speed 0 Synchronous motor rpm
V03 %Load Relative Motor load 0 Overload current1,2
V04 Amps Drive output current 0 Overload current1
V05 Volts DC DC link voltage 0 1.69 x Vout AC max
V06 kW Drive output power 0 1.69 x Vout AC max x
Overload current
V07 Volts AC Drive output voltage 0 1.1 x Vout AC max
V08 ºC Power circuit temperature
(Celsius)
-273
(Celsius)
227
(Celsius)
V09 Ripple
A number proportional to
the RMS current in the DC
bus capacitors, provided for
factory diagnostic purposes
Not Applicable Not Applicable
V10 I2t used Motor thermal overload
level 0 Overload current
P38 PID Output PID output 0 MAX Hz
This menu requires a signal source selection from the list of available signals. Use the up and down push
buttons to move through the list. Press Enter to make your choice or ESC to abandon.
P02 Zero opt %
Default value: 0%
Menu location: The P01 Analog Opt menu
Range: -100 to 100% of chosen signal
This value specifies the percentage of the chosen signal that will produce zero output at the analog output
terminals. Also, if the chosen signal goes below this value, zero output is found at the output terminals.
For example, with V02 rpm as the chosen signal, a 4 to 20mA output is required for the speed range. Set
P02 Zero opt % to -25% and P03 Max opt % to 100%.
1 See MSC-3 output current specification in the MSC-3 Instruction Manual.
2 Based on a Power Factor of 0.85.

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P03 Max opt %
Default value: 100%
Menu location: The P01 Analog Opt menu
Range: -1000 to 1000% of chosen signal
This value specifies the percentage of the chosen signal that will produce maximum output at the analog
output terminals. Also, if the chosen signal goes above this value, maximum output is maintained at the
analog output terminals.
P04 Min opt %
Default value: 0%
Menu location: The P01 Analog Opt menu
Range: 0 to 100% of output signal
This value specifies the minimum output value permitted at the analog output terminals under all
conditions. If the signal to be output is below this value, it will be ignored and the minimum value is output
instead.
For example, with V01 Hz as the chosen signal, a 0 to 5V output is required for the speed range 0 to 50
Hz. It is required that if the speed drops below 10Hz the output is not to drop below 1V. In this case set
the P04 Min Opt % to 20%.
Analog Output Setup Checklist
1. Set the Extended Features Option DIP switches (SW1-3,4,5) for the output signal type to be used
(voltage signal or current signal) and connect your monitoring equipment.
2. Find the P01 Analog Opt menu item in the G00 INPUT/OUTPUT menu.
3. Choose the signal source.
4. Check and/or adjust the P02 Zero Opt %.
5. Check and/or adjust the P03 Max Opt %.
6. Check and/or adjust the P04 Min Opt %.

IM00087B16
MSC-3 Extended Features Option Manual
ZENER
Extended Features Option References
P05 OPTION REFS
This menu contains the additional references of the Extended Features Option. Extra references include
six presets and two user selectable references that are selected by digital input wiring. The next section
(Reference Selector) explains how the digital inputs select a reference.
User Selectable References
P06 User Ref 1
Default value: R00 AN1 (Terminals 10 & 11 on MSC-3 Control Board)
P07 User Ref 2
Default value: P22 Analog Input (Terminals 9 & 10 on Extended Features Option Board)
Menu location: P05 OPTION REFS menu (see page 11)
The above two user selectable references can each be mapped to anyone of the following selections:
R00 AN1 Control board analog input
R03 PRESET Control board preset
R04 MOTORIZED POT Control board Motorized potentiometer
R07 CONSOL REF Control board console reference
P22 Analog inpt Extended Features Option analog input
P14 Ref select Extended Features Option reference selector
P38 PID output Extended Features Option PID controller output
P37 Zero ref Extended Features Option zero reference
Note: If P14 Ref Select is chosen for either P06 User Ref 1 or P07 User Ref 2, zero speed is used as
the speed reference.
Preset References
P08 Preset 1
P09 Preset 2
P10 Preset 3
P11 Preset 4
P12 Preset 5
P13 Preset 6
Default values: 10,20,30,40,50,60 % (respectively)
Menu location: P05 OPTION REFS menu
Range: -100 % to +100 % of the C02 MAX Hz value or
-100 % to +100 % of the Process variable range if used for the PID set point.
The preset speeds provide extra speed references for the MSC-3. When a preset is selected it is adjusted
using the console Up and Down push buttons. Setting a negative preset value will specify a reverse
speed reference provided reverse operation has been enabled and the FWD and REV inputs are wired to
+5V.