Toshiba G7 Series Applications Workbook page 52

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a.) Count the total number of drives (Master and Followers) in the series. If the total is even, go to

step b if the total is odd, go to step c

b.) Program the drive as an RS485 Follower. If the next drive in the series is the Primary Master

go to step f, otherwise go to step d.

c.) Program the drive as a TTL Follower, go to step e.

d.) Working backwards, connect the present drive to the next drive in the series using a RS485

cross-over cable (RS485 cable 1) plugged into port CNU1 on both drives. Program the drive

as a TTL Follower. Give both drives a run command and check that the RS485 Follower

follows the signal from the TTL Follower drive. Go to step E.

e.) Working backwards, connect the present drive to the next drive in the series using a TTL

cross-over cable (TTL cable) plugged into port CNU2 on both drives. Program the drive as an

RS485 Follower. Give both drives a run command and check that the TTL Follower follows

the signal from the RS485 Follower drive. If the next drive in the series is the Primary Master

go to step f, otherwise go to step d.

f.) Working backwards, connect the current drive to the Primary Master using an RS485 cross-

over cable (RS485 Cable 1) plugged into port CNU2 on both drives. Program the drive as a

Primary Master. Give all drives in the series a run command and adjust the frequency

command of the Primary Master. Check the Keyboard on the last follower to verify that the

frequency reference is being transmitted appropriately. Verify that all intermediate followers

are running.

.If one of the drives in the series is not running:

Verify that the drive is receiving a run command either from the keypad, the terminal strip

or via a communications card.

Check that the Drive is connected to the previous drive in the series.

Check the programming for the drive.

If all drives in the series after a particular drive are not running.

Verify that the first non-operational drive is receiving a run command either from the

keypad, the terminal strip or via a communications card. Check all other drives in the

series to verify that all drives in the series are receiving a run command.

Check that the Drive is connected to the previous drive in the series. Make sure that the

proper ports are being used.

Check the programming for the drive. Note: If item F806 or F826 are programmed to

Output Command Frequency and the drive is stopped, the frequency command will not be

passed to other drives in the series.

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

H7 series