Rockwell Automation 1336T Master/Slave Parallel AC Drv User Manual

Page 29

1336 FORCE-5.19 – August, 2000

Startup

3-11

The slave drive can be kept in the ready state indefinitely. The master
drive enable must be completed within 1 second or the drive will
fault. This will decrease the probability that one drive continues
operation if the other faults.

Master - Transistor Diagnostics - Perform the following steps:

1. Make certain all motor leads are connected correctly at motor

end.

2. Connect motor leads at Master drive cabinet only, leave motor

leads at Slave drive cabinet safely disconnected and isolated
(from each other as well as any ground) as they will have a high
voltage potential.

3. Remove the enable for the Slave drive only.

4. Set Autotune/Diagnostics Selection (P256) to 1 in the Master

drive (transistor diagnostic).

5. Give the Master drive a start command within 30 seconds of

setting Parameter 256. (P368 = 8210)

6. If the Drive faults, check P258 (Inverter Diag. 1) and P259

(Inverter Diag. 2) to determine the failure description.

7. Record values in P260 (Iq Offset)and P261 (Id Offset). Stop

the drive.

Master - Motor Phase Rotation test - Perform the following steps:

1. Connect the master drive to the master motor windings (L1, L2

and L3 in the following example using a Reliance motor).
Disconnect the slave motor windings (L11, L22 and L33) and
isolate as necessary, as they will have a high voltage potential.

2. Increase P91 (Stall Delay) to 120 secs. Give the Slave drive a

Start command P368 = 8210. Otherwise the Master drive will
fault on “M/S Ena Timeout”. Please note: Slave P59 (Logic
Options) Start Diagnostics bit must be 0, otherwise drive will
fault on “autotune failure”.

ATTENTION: When performing the following
transistor diagnostic and motor rotation tests, the
disconnected motor leads at the Slave & Master drives
will have drive rated potential (voltage)! Take proper
precautions to ensure that no one comes in contact with
the live leads.

Master

T11

L11

T22

L22

T33

L33

Slave