Toshiba G3 Operation instructions

1
G3 Applications
Workbook

2
G3 Applications Workbook
©2006 Toshiba International Corporation
Industrial Division
13131 West Little York Road
Houston Texas 77041
Phone [phone] • Fax [phone]
www.toshiba.com/ind

Table of Contents
Application Page
Programmable Monitoring 4
Binary Input 6
Pattern Run 8
Preset Speeds 11
Motor Operated Pot1 (MOP) 14
Motor Operated Pot2 (MOP) 15
Three Wire Control 17
Master-Follower 19
Programming the Input Terminals 21
Trim Pot 23
Speed Band Output 25
Adjustable Remote Torque Limit 26
Unblinded Groups Default 28
Bypass Control 29
Cyclic Overhauling Load 31
True Torque Control 35
Acc/Dec Time Switching Frequency 36
Direction Change with RX Input 37
Half Speed Command 39
Analog Outputs 40
Output Contacts 44
PID 48
Master/Follower: Pulse Output 56
Independent Dancer Control 59
Trim Dancer Control 62
120 Hz Constant Torque Operation of a 60 Hz Motor 65
Overspeed 67
Drooping 70
Carrier Frequency Derating 72
Load Sharing Application 74
Tosline F10 Communications With G3 Inverter and T2 PLC 76
Toshiba S20 Fiber Optics Communication 79
Changing the G3 LCD Display to German 86

1
Programmable Monitoring
The G3 has an extensive monitoring system which is employed via the keypad. The information
given in the monitor displays is useful while troubleshooting or commissioning applications.
Key Display Description
MOTOR RUN DIRECTION:
FORWARD Indicates direction associated with speed reference. Keypad direction reference
is separate from terminal strip direction reference.
MONITOR #1
MONITOR #2
PROGRAMMABLE
MONITOR #3 SEE BELOW
MONITOR #4
STATUS: R:-- S1:-- S2:--
S3:-- S4:-- S5:-- As these input terminals are shorted to CC, the “--” will change to “ON”. Use
this as a troubleshooting tool.
ST:ON F:-- RES:--
S6:-- S7:-- S8:-- As these input terminals are shorted to CC, the “--” will change to “ON”. Use
this as a troubleshooting tool. S6, S7, and S8 exist only on option card.
RCH:-- LOW:-- FLT:--
OUT:-- FAN:-- MC:ON As these output terminals close, the “--” will change to “ON”. Use this as a
troubleshooting tool. OUT exists only on option card. MC always says “ON”.
“FAN” shows “ON” when the drive’s muffin fan is on.
CUMULATIVE RUN TIME
0.00 .01 represents one hour. The timer is not resettable. An output contact can be
programmed to change state based on the CRT.
PAST TRIP #1
NO ERROR
PAST TRIP #2
NO ERROR The drive stores past faults; to clear these, put a “4” into Standard Setting Mode
Selection in the UTILITY PARAMETERS group.
PAST TRIP #3
NO ERROR
PAST TRIP #4
NO ERROR
MOTOR RUN DIRECTION:
FORWARD End/beginning of MONITOR mode
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The following are the possible functions that can be assigned to the four programmable monitors
Value Description Comments
1 Drive compensated output frequency This will be greater than the commanded frequency.
2 Frequency reference This is not necessarily output frequency - drive may be stopped or accel/deceling
3 Output current (output current)2= (torque current)2 + (excitation current)2
4 Input voltage Drive gets from input VAC times 1.73 (will increase during regen).
5 Output voltage
6 Torque current (output current)2= (torque current)2 + (excitation current)2
7 Excitation current (output current)2= (torque current)2 + (excitation current)2
8 PID feedback value Displays the frequency the feedback signal represents
9 Motor OL ratio Example: G3 is rated 150% for 2 min. If you run at 150% for 1 minute, monitor will
10 Inverter OL ratio read “50%”. These monitors represent remaining overload capability. If any monitor
11 DBR OL ratio hits 100%, the drive trips. Drive OL warning starts when drive OL ratio hits 50%
12 Input power In KW
13 Output power In KW
14 RR terminal value Dependent on setting of “RR Input Special Function Select” (1)
15 Peak output current Reset by cycling power, pressing RUN, or resetting drive. Drive keeps track of both
16 Peak input voltage of these values even when not programmed to display as one of the four monitors.
Programming
The following example will make the monitors one through four frequency reference, torque
current, peak input voltage, and peak output current respectively.
Group Parameter New Value
UTILITY PARAMETERS Status Monitor #1 Display Select 2
UTILITY PARAMETERS Status Monitor #1 Display Select 6
UTILITY PARAMETERS Status Monitor #1 Display Select 16
UTILITY PARAMETERS Status Monitor #1 Display Select 15
If you want the current values to be displayed as amps, change Current Units Selection in the
UTILITY PARAMETERS group to “1”. If you want the voltage values to be displayed in percent,
change Voltage Units Selection in the UTILITY PARAMETERS group to a “0”.
(1)
Setting of RR Input Special
Function Select Comments
1 With 10 volts on ‘RR’ terminal, this monitor shows FH. Effective FH is
displayed as ‘RR’ input is changed. Zero volts on ‘RR’ makes effective
FH 30 Hz.
2 Displays acc/dec multiplier. Zero volts on ‘RR’ results in a display of
“1.0”. Ten volts on ‘RR’ results in a display of “10.0”.
3 Displays effective voltage boost. Zero volts on the ‘RR’ terminal results
in a “0.0” display. At ten volts, Voltage Boost is displayed
4 Displays effective Stall Protection Current Level. Minimum is 10%. A
bug: If Current Units Selection in UTILITY PARAMETERS is set to
show current in amps, no units will be displayed with the value in this
monitor.

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2
Binary Input
Introduction
Among the many types of speed reference the G3 can accept is a binary coding. The binary code is based
upon the value of the programmed value of the Maximum Output Frequency (MOF) in the UTILITY
PARAMETERS group. A maximum of seven bits is available to code for the desired speed (ten with the option
board). The speed reference is a sum of digits whose value is the MOF divided by a power of two.
The following example allows a frequency setting resolution of 1 Hz when MOF is 64 Hz. Six bits will be
used. The Reset function will not be available in this scenario. F-CC and ST-CC must be hardwired on the
terminal strip to run.
Terminals S1, S2, S3, S4, RES, and R are assigned the functions of binary bits 10 through 5 respectively.
Binary bits 10 through 5 have reference values of MOF/21, MOF/22, MOF/23, MOF/24, MOF/25, and MOF/26
respectively. In this example, these values are 32, 16, 8, 4, 2, and 1.
Connections
F CC ST
S1 S2 S3 S4 RES R CC
Example of input combinations and corresponding drive outputs with MOF = 64 Hz
S1-CC (32) S2-CC (16) S3-CC (8) S4-CC (4) RES-CC (2) R-CC (1) Frequency Command
closed open open open open open 32
open closed open open closed closed 16+2+1 = 19
closed open open closed open closed 32+16+2 = 50
closed closed closed closed open open 32+16+8+4= 60
open open closed closed open open 8+4 = 12
Notes:
Be careful to connect to “R” and not to “RR”.
You may want to set an unused terminal’s function to “42” (binary data write) to store the frequency
command in the drive’s RAM. The drive will keep running at the speed commanded when the binary
data write was given (i.e. the terminal was shorted to CC) even though the contact closures that coded
for the reference may change.This RAM-written reference is lost when the drive is powered down.

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Programming Group Parameter New Value
UTILITY PARAMETERS Blind Function Selection 1
UTILITY PARAMETERS Terminal Selection Parameters Blind 1
UTILITY PARAMETERS Frequency Setting Parameters Blind 1
TERMINAL SELECTION PARAMETERS Input Terminal Selection 1
TERMINAL SELECTION PARAMETERS “R” Input Terminal Function 27
TERMINAL SELECTION PARAMETERS “S1” Input Terminal Function 32
TERMINAL SELECTION PARAMETERS “S2” Input Terminal Function 31
TERMINAL SELECTION PARAMETERS “S3” Input Terminal Function 30
TERMINAL SELECTION PARAMETERS “S4” Input Terminal Function 29
TERMINAL SELECTION PARAMETERS “RES” Input Terminal Function 28
FREQUENCY SETTING PARAMETERS Frequency Priority Selection #1 5
FUNDAMENTAL PARAMETERS #1 Maximum Output Frequency 64
If you need more terminals (for more bits and more accuracy), see Potential Terminal Function in the
TERMINAL SELECTION PARAMETERS group and Guideline 10, Programming the Input Terminals.

*For additional assistance, please contact Toshiba Adjustable Speed Drive Marketing Dept. at (800) 872-
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8
3
Pattern Run
Introduction
Like the G2/G2+, the G3 has a Pattern Run feature. Pattern Run allows the user to associate a time, direction,
accel/decel time, and volts/hertz pattern with each preset speed. Any seven of the fifteen preset speeds can be
strung together to create a pattern; the G3 stores four such patterns. The number of times a pattern repeats is
programmable from one to infinity.
Pattern Run Diagram
Forward
Speed 2 time = 6 sec
30 Hz ACC2 used
DEC1 used
15 Hz
Speed 1
time =
3 sec
time
11 Hz Speed 3
time = time =
ACC1 used change in HZ / 3 sec
Max Out Freq * ACC2
= 15/80*30 = 5.625sec
Reverse time=41/80*5 = 2.56 sec

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This programming example runs the above pattern twice
Group Parameter Value
UTILITY PARAMETERS Blind Function Selection 1
UTILITY PARAMETERS Frequency Setting Parameters Blind 1
UTILITY PARAMETERS Fundamental Parameters #2 Blind 1
UTILITY PARAMETERS Pattern Run Control Parameters Blind 1
FREQUENCY SETTING PARAMETERS Preset Speed Selection 3
FREQUENCY SETTING PARAMETERS Preset Speed Mode Activation 1*
FREQUENCY SETTING PARAMETERS Preset Speed #1 Frequency 15
FREQUENCY SETTING PARAMETERS Preset Speed #1 Operating Mode 0
FREQUENCY SETTING PARAMETERS Preset Speed #2 Frequency 30
FREQUENCY SETTING PARAMETERS Preset Speed #2 Operating Mode 2
FREQUENCY SETTING PARAMETERS Preset Speed #3 Frequency 11
FREQUENCY SETTING PARAMETERS Preset Speed #3 Operating Mode 1
PATTERN RUN CONTROL PARAMETERS Pattern Run Selection 1
PATTERN RUN CONTROL PARAMETERS Pattern Run Continue Mode 0
PATTERN RUN CONTROL PARAMETERS Pattern Group #1 Speed #1 1
PATTERN RUN CONTROL PARAMETERS Pattern Group #1 Speed #2 2
PATTERN RUN CONTROL PARAMETERS Pattern Group #1 Speed #3 3
PATTERN RUN CONTROL PARAMETERS Pattern Group #1 Number Of Cycles 2
PATTERN RUN CONTROL PARAMETERS Speed #1 Continue Mode 2**
PATTERN RUN CONTROL PARAMETERS Speed #1 Drive Time 3
PATTERN RUN CONTROL PARAMETERS Speed #2 Continue Mode 2**
PATTERN RUN CONTROL PARAMETERS Speed #2 Drive Time 6
PATTERN RUN CONTROL PARAMETERS Speed #3 Continue Mode 2**
PATTERN RUN CONTROL PARAMETERS Speed #3 Drive Time 3
FUNDAMENTAL PARAMETERS #1 Acceleration Time #1 5
FUNDAMENTAL PARAMETERS #1 Deceleration Time #1 5
FUNDAMENTAL PARAMETERS #2 Acceleration Time #2 30
FUNDAMENTAL PARAMETERS #2 Deceleration Time #2 30
To run from the keypad, make sure the LOCAL/REMOTE LED is on, then press RUN.
Hit the STOP button after completion to stop blinking LED and allow Pattern Run to be started again.
To run from the terminal strip, program the following...
Group Parameter Value
UTILITY PARAMETERS Blind Function Selection 1
UTILITY PARAMETERS Terminal Selection Parameters Blind 1
TERMINAL SELECTION PARAMETERS Input Terminal Selection 1
TERMINAL SELECTION PARAMETERS “S1” Input Terminal Function 14
...make sure the LOCAL/REMOTE LED is off, ‘F’-’CC’ or ‘R’-’CC’ is made, and close ‘S1’ to ‘CC’.

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The drive can store programming for four different pattern runs - each can be remotely run by
programming an input terminal’s function (TERMINAL SELECTION PARAMETERS group) with a
value of 14 (for Pattern Run #1), 15 (for Pattern Run #2), 16 (for Pattern Run #3), or 17 (for Pattern Run
#4).
With normal programming, when a STOP command is given (i.e. ‘F’-’CC’ or ‘R’-’CC’ is opened or
STOP is pressed on the keypad) and the RUN command is remade (i.e. ‘F’-’CC’ or ‘R’-’CC’ is remade or
the RUN button is pressed), the Pattern Run starts over with the first speed. If an input terminal’s function
is programmed to “Pattern Run continue signal” (see value 18 in Guideline 10, Input Terminals), and this
terminal is shorted to ‘CC’, the drive resumes the pattern run at the speed after the speed at which it was
running when the STOP was given. Note: opening and reclosing ‘ST’-’CC’ is not considered a
STOP/RUN command in this scenario; the pattern’s clock keeps ticking. The continue signal must be
active when the pattern is started for correct Continue operation.
Speed #0 in any pattern is only run on the initial pass of the pattern (repeats of pattern don’t include Speed
#0) Press the MON button during the run to see the special information displayed during Pattern Run.
* If Preset Speed Mode Activation is set to “0”, the drive ignores direction, accel/decel times, and V/Hz
programmed into Preset Speed n Operating Mode and looks for direction and/or ACC/DEC and/or V/Hz
from terminal strip.
** With this parameter set to “5” and an input terminal’s function set to “19” (“Pattern Run step signal” ;
see Guideline 10, Input Terminals), the drive steps through the pattern’s speeds every time a momentary
contact closure is made to ‘CC’. Any programmed speed time is ignored.

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4
Preset Speeds
Introduction
Among the many speed references the G3 can accept are dry contact closures which it can be programmed
to interpret as preset speeds. A maximum of fifteen preset speeds can be accessed via four terminals and a
binary implementation. The following example will program all fifteen preset speeds from 5 Hz for Preset
Speed 1 to 75 Hz for Preset Speed 15 in steps of 5 Hz.
In this scenario, the terminals are assigned a value of a power of two. This value is the number of the preset
speed that is active.
With the following programming, S4, S3, S2, and S1 have values of 23, 22, 21 , and 20, which are 8, 4, 2, and 1
respectively.
Connections
TERMINAL STRIP
ST CC F CC
S1 S2 S3 S4 CC
Preset speed selected as function of input contact condition
S4-CC (8) S3-CC (4) S2-CC (2) S1-CC (1) Number of Preset Speed
open closed open closed 4+1=5
open open open closed 1
open closed closed closed 4+2+1=7
closed closed closed closed 8+4+2+1=15

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Programming Group Parameter Value
UTILITY PARAMETERS Blind Function Selection 1
UTILITY PARAMETERS Terminal Selection Parameters Blind 1
UTILITY PARAMETERS Frequency Setting Parameters Blind 1
TERMINAL SELECTION PARAMETERS “S1” Input Terminal Function 1 (default)
TERMINAL SELECTION PARAMETERS “S2” Input Terminal Function 2 (default)
TERMINAL SELECTION PARAMETERS “S3” Input Terminal Function 3 (default)
TERMINAL SELECTION PARAMETERS “S4” Input Terminal Function 4 (default)
FREQUENCY SETTING PARAMETERS Preset Speed Selection 15
FREQUENCY SETTING PARAMETERS Preset Speed Mode Activation 0*
FREQUENCY SETTING PARAMETERS Preset Speed #1 Frequency 5
FREQUENCY SETTING PARAMETERS Preset Speed #1 Operating Mode 0 (default)*
FREQUENCY SETTING PARAMETERS Preset Speed #2 Frequency 10
FREQUENCY SETTING PARAMETERS Preset Speed #2 Operating Mode 0
FREQUENCY SETTING PARAMETERS Preset Speed #3 Frequency 15
FREQUENCY SETTING PARAMETERS Preset Speed #3 Operating Mode 0
FREQUENCY SETTING PARAMETERS Preset Speed #4 Frequency 20
FREQUENCY SETTING PARAMETERS Preset Speed #4 Operating Mode 0
FREQUENCY SETTING PARAMETERS Preset Speed #5 Frequency 25
FREQUENCY SETTING PARAMETERS Preset Speed #5 Operating Mode 0
FREQUENCY SETTING PARAMETERS Preset Speed #6 Frequency 30
FREQUENCY SETTING PARAMETERS Preset Speed #6 Operating Mode 0
FREQUENCY SETTING PARAMETERS Preset Speed #7 Frequency 35
FREQUENCY SETTING PARAMETERS Preset Speed #7 Operating Mode 0
FREQUENCY SETTING PARAMETERS Preset Speed #8 Frequency 40
FREQUENCY SETTING PARAMETERS Preset Speed #8 Operating Mode 0
FREQUENCY SETTING PARAMETERS Preset Speed #9 Frequency 45
FREQUENCY SETTING PARAMETERS Preset Speed #9 Operating Mode 0
FREQUENCY SETTING PARAMETERS Preset Speed #10 Frequency 50
FREQUENCY SETTING PARAMETERS Preset Speed #10 Operating Mode 0
FREQUENCY SETTING PARAMETERS Preset Speed #11 Frequency 55
FREQUENCY SETTING PARAMETERS Preset Speed #11 Operating Mode 0
FREQUENCY SETTING PARAMETERS Preset Speed #12 Frequency 60
FREQUENCY SETTING PARAMETERS Preset Speed #12 Operating Mode 0
FREQUENCY SETTING PARAMETERS Preset Speed #13 Frequency 65
FREQUENCY SETTING PARAMETERS Preset Speed #13 Operating Mode 0
FREQUENCY SETTING PARAMETERS Preset Speed #14 Frequency 70
FREQUENCY SETTING PARAMETERS Preset Speed #14 Operating Mode 0
FREQUENCY SETTING PARAMETERS Preset Speed #15 Frequency 75
FREQUENCY SETTING PARAMETERS Preset Speed #15 Operating Mode 0
* If Preset Speed Mode Activation is left at “0” (as it is in this example), then the direction of a preset
speed run is determined by contact closure on the terminal strip.

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If Preset Speed Mode Activation is changed to “1”, then the direction, ACC/DEC time, and V/Hz pattern
associated with that preset speed is determined solely by the Preset Speed #n Operating Mode
(FREQUENCY SETTING PARAMETERS group) as seen in the manual. A F-CC or R-CC closure must
still be made to run preset speeds, but the direction the closure represents is ignored.
TIP: If you have from two to four preset speeds, use speeds #1, 3, 7, and 15. This reduces the number of
contact openings/closings that have to take place.

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5
Motor Operated Pot1 (MOP)
Introduction
Frequently used for pendant stations on cranes, MOP control generates a speed reference for the G3 based on
how long a momentary contact is made. When the “increase” contact is made, the drive increases its output
frequency until the contact is released, at which point it maintains the current frequency. When the “decrease”
contact is made, the drive decreases its output frequency until the contact is released, at which point it
maintains the current frequency. A closure of the momentary “reset” contact ramps the drive down to zero
hertz. Do not use this control scenario with ACCEL and/or DECEL times greater than 10 seconds.
Connections
TERMINAL STRIP
ST CC F CC
S1 CC S2 CC S3 CC
Increase Decrease Reset
Programming Group Parameter Value
UTILITY PARAMETERS Blind Function Selection 1
UTILITY PARAMETERS Terminal Selection Parameters Blind 1
UTILITY PARAMETERS Frequency Setting Parameters Blind 1
TERMINAL SELECTION PARAMETERS Input Terminal Selection 1
TERMINAL SELECTION PARAMETERS “S1” Input Terminal Function 34
TERMINAL SELECTION PARAMETERS “S2” Input Terminal Function 35
TERMINAL SELECTION PARAMETERS “S3” Input Terminal Function 36
FREQUENCY SETTING PARAMETERS Frequency Priority Selection #1 5

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6
Motor Operated Pot2 (MOP)
Introduction
Frequently used for pendant stations on cranes, MOP control generates a speed reference for the G3 based on
how long a momentary contact is made. When the “increase” contact is made, the drive increases its output
frequency until the contact is released, at which point it maintains the current frequency. When the “decrease”
contact is made, the drive decreases its output frequency until the contact is released, at which point it
maintains the current frequency. A closure of the momentary “reset” contact ramps the drive down to zero
hertz. Do not use this control scenario with ACCEL and/or DECEL times greater than 10 seconds.

*For additional assistance, please contact Toshiba Adjustable Speed Drive Marketing Dept. at (800) 872-
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Programming Group Parameter Value
UTILITY PARAMETERS Blind Function Selection 1
UTILITY PARAMETERS Terminal Selection Parameters Blind 1
UTILITY PARAMETERS Frequency Setting Parameters Blind 1
TERMINAL SELECTION PARAMETERS Input Terminal Selection 1
TERMINAL SELECTION PARAMETERS “S1” Input Terminal Function 34
TERMINAL SELECTION PARAMETERS “S2” Input Terminal Function 35
TERMINAL SELECTION PARAMETERS “S3” Input Terminal Function 36
FREQUENCY SETTING PARAMETERS Frequency Priority Selection #1 5
FREQUENCY SETTING PARAMETERS Frequency Priority Selection #2 2

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7
Three Wire Control
Introduction
The G3 can be programmed to allow three-wire start/stop functionality without the use of an external relay.
Notice: that the pushbuttons utilized are momentary. The switch ‘S3” determines direction. Remember to cycle
power when finished with any super user programming.
Connections For the g3 three wire control
Programming Group Parameter New Value
UTILITY PARAMETERS Command Mode Selection *1
UTILITY PARAMETERS Frequency Mode Selection *2
UTILITY PARAMETERS Blind Function Selection 1
UTILITY PARAMETERS Terminal Selection Parameters Blind 1
TERMINAL SELECTION PARAMETERS Input Terminal Selection 1
TERMINAL SELECTION PARAMETERS “S1” Input Terminal Selection 37
TERMINAL SELECTION PARAMETERS “S2” Input Terminal Selection 38
TERMINAL SELECTION PARAMETERS “S3” Input Terminal Selection 40
Notes
*1 – Command Mode Selection controls how the run command is given to the drive. The following
settings are useable with 3 wire control .
1 – Terminal Input Valid.
4 – Local/Remote control. Local/Remote light must be off.

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*2 – Frequency Mode Selection controls how the frequency command is given to the drive. The
following settings are useable with 3 wire control .
0 – RS232 input valid. The frequency command is received via the RS232 port on the
control board
1 – Terminal Input Valid. The frequency command is received via the terminal strip E.G. a
manual pot.
2 – Panel Input, frequency command is received via the Up/Down arrows on the keypad.
3 – RS485 option board, frequency command is received via a communications option
board.
4 – Local/Remote control. Local/Remote light must be off.
The following programming makes STOP active upon opening S2-CC. This programming should only be
performed if a normally closed momentary switch is to be used for STOP.
KEYSTROKE RESULTING DISPLAY
PRG OUTPUT FREQUENCY
0.0 Hz
LOCAL/REMOTE OUTPUT FREQUENCY
0.0 Hz
READ/WRITE OUTPUT FREQUENCY
0.0 Hz
READ/WRITE hold down OUTPUT FREQUENCY
0.0 Hz
LOCAL/REMOTE RAMF
down arrow until EEP
READ/WRITE 0380
up arrow until 046A
READ/WRITE 0
up arrow until 8
READ/WRITE 046A alternating with 8, then 046A
PRG OUTPUT FREQUENCY
0.0 Hz
Cycle power when finished with programming

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8
Master-Follower
Introduction
Using the RS485 card, the G3 can be controlled in a master-follower configuration. The
configuration allows the follower(s) to follow the master’s output frequency or the reference by
which the master is controlled. Like all G3 speed references, there is a bias/gain adjustment to allow
ratioing of speeds between the master and the follower(s). The cards are connected in parallel with a
twisted pair.
Connections
A B SG Shld A B SG Shld A B SG Shld
Follower G3 Master G3 Follower G3
Programming for the master
Group Parameter New value
UTILITY PARAMETERS Blind Function Selection 1
UTILITY PARAMETERS Communication Parameters Blind 1
COMMUNICATION SETTING PARAMETERS Communication Selection 1
COMMUNICATION SETTING PARAMETERS RS485 Baud Rate 0**
COMMUNICATION SETTING PARAMETERS Master/Slave Selection 2*
* Enter a “1” to follow the master’s output frequency. Enter a “2” to follow the master’s frequency reference
Programming for the follower(s)
Group Parameter New value
UTILITY PARAMETERS Blind Function Selection 1
UTILITY PARAMETERS Communication Parameters Blind 1
UTILITY PARAMETERS Frequency Mode Selection 3
COMMUNICATION SETTING PARAMETERS Communication Selection 1
COMMUNICATION SETTING PARAMETERS RS485 Baud Rate 0**
COMMUNICATION SETTING PARAMETERS Master/Slave Selection 0
.
Cycle power after changing anything in the COMMUNICATION SETTING PARAMETERS group.
A ratio can be set between the master and each follower. In the COMMUNICATION SETTING
PARAMETERS group, see RS485/12 Bit Binary Bias, Gain and the four parameters that follow.

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Put Jumper 3 in the “TERM” position for the drives that are at the “ends” of the RS485 chain (i.e. only
one wire is connected to their S1 terminals and only one wire is connected to their S2 terminals).Put
all other drives’ Jumper 3 in the “OPEN” position. The “TERM” connection puts a 120 ohm resistor
across S1-S2.
** Baud rate is affected by Jumpers 1 and 2 and the setting of RS485 Baud Rate (in the
COMMUNICATION SETTING PARAMETERS group) as follows:
RS 485 Baud Rate
Setting
J1 J2 0 1
off off 9600 38400
on off 4800 19200
off on 2400 9600
on on 1200 4800
The maximum baud rate on the INV3-COM-B card is 19200.
The maximum baud rate on the INV3-COM-C card is 38400.
Adjust jumpers appropriately so that all drives have same baud rate.
Each slave may be separately trimmed up or down from the master reference by a local speed pot; see
Application Guideline 11, Trim Pot.
Slaves are still stopped/started via keypad or contact closure on the terminal strip.
Maximum combined cable length for RS485 is 1000 meters.
You must have a version 120 CPU to operate Master-Follower. Check CPU Version in the UTILITY
PARAMETERS group to verify (the other version is 101). If you do not have a version 120 CPU,
contact inverter marketing and request an option ROM for your version of CPU.