Toshiba G7 Series Applications Workbook page 51

This arrangement makes use of an RS485 crossover cable (RS48 Cable 1) between the
master/even numbered followers and subsequent odd numbered followers; and a TTL crossover
cable (TTL Cable 1) between odd numbered followers and subsequent even numbered followers.
Programming
Parameter
Primary Master RS485/232 Master Output Selection
RS485 Follower
TTL Follower
RS485/232 Master Output Selection
*Caution: Both the RS485 port (CNU1) and the TTL port (CNU2) on the G7 control board may be
programmed to output. Programming both ports to output at the same time will effectively lock out
keypad control and programming.
**No Slave - Port remains an input port
Frequency Reference - Port outputs the master's present frequency reference, regardless of
whether the master is running or not.
Output Command Frequency - Port outputs the master's present operating frequency. If the
master is not running all followers will be stopped
Torque Command - Port outputs the master's present torque reference, regardless of whether
the master is running or not.
Output Torque Command - Port outputs the master's present operating frequency. If the master
is not running all followers will be stopped
Note: Power must be cycled on the drive for any change in F825 or F826 to take effect
Note: faulting the master drive will prevent the port from outputting a signal
A note on Command Mode Selection: Both the master and follower drive may make use of any
Command Mode Selection except "Use RS485/232".
One thing to keep in mind with this arrangement is that each follower drive is then a master drive
for the next follower down the line. The follower drive will receive it's frequency command either
through the TTL port or the RS485 port on the control board. The same follower drive will then
output a frequency command on the port that is not being used for input frequency.
Since both ports are being used either for Input or output, the keypad on the in cannot be used
on the drives between the primary master and the last follower. This means that proper setup is
important for successful operation of the followers.
Start with the last follower in the series and work back towards the primary master using the
steps below and referencing the programming table above.
For additional assistance, please contact Toshiba Adjustable Speed Drive Marketing Dept. at (800) 872-2192
efesotomasyon.com -Toshiba inverter,drive,servo,plc
Frequency Mode #1
TTL Master Output*
Frequency Mode #1
Direct Access
*
F826
F004
F806
F004
*
F826
New Value
**
Use RS485/232
**
Use Common (TTL)
**
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