CONTREX ML-Drive - Manual (Page 4)

Step 4: Check MP-47 (Drive Output).
a) Should not be “0” or “100”.
b) If “0”, then return to step 1 of “Scaling”.
c) If “100”, check wiring to motor.
Step 5: If armature contactor is used, make sure it is energized.
Master Mode: Motor At Full Speed
Step 1: Press “SETPOINT” and enter midrange setpoint.
Step 2: Check MP-43 (Feedback Frequency).
a) Should not be zero.
b) Check that signal is present at feedback input (J4 Pins 4 and 5).
Step 3: Stop the ML-Drive.
Step 4: If motor does not stop, check MP-47 (Drive Output).
a) Should be zero.
b) Check MP-53: Should be “0100” or “1000”.
c) If not, check R-Stop and F-Stop wiring.
Step 5: If motor is still running, suspect false-fired or bad SCR’s.
Follower Mode: Motor Will Not Run
Step 1: Check unit out in Master Mode first.
Step 2: Check MP-50 (Active Scale Mode)
a) Should be “0100" (Follower Mode).
b) If not, check wiring to verify that Follower mode has been selected.
Step 3: Check MP-53 (Control State)
a) Should be “0010” (Run).
b) If not, check Run, R-Stop and F-Stop wiring.
Step 4: Check MP-41 (Lead Frequency).
a) Should display the lead sensor frequency.
b) If not, check signal at Lead Frequency input.
Step 5: Check MP-45 (Scaled Reference).
a) Should not be zero.
b) If zero, press “SETPOINT” and enter a non-zero ratio setpoint.
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O N T R E X , I N C . O N T R E X , I N C . O N T R E X , I N C . O N T R E X , I N C . O N T R E X , I N C .
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