*
For additional assistance, please contact Toshiba Adjustable Speed Drive Marketing Dept. at (800) 872-
2192
19
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.
