CONTREX M-Drive - Manual (Page 4)

Step 4: Check MV-47 (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 “SETSPEED” and enter midrange setpoint.
Step 2: Check MV-43 (Feedback Frequency).
a) Should not be zero.
b) Check that signal is present at feedback input (J3 Pins 5 and 6).
c) Check the feedback configuration jumpers per Chapter 2 of the “M-Drive User Manual”.
Step 3: Stop the M-Drive.
Step 4: If motor does not stop, check MV-47 (Output).
a) Should be zero.
b) Check MV-53: Should be “64” or “128”.
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 MV-54 (Control Mode)
a) Should be less than 128.
b) If not, check wiring to verify that Follower mode has been selected.
Step 3: Check MV-53 (Control State)
a) Should be “32” (Run).
b) If not, check Run, R-Stop and F-Stop wiring.
Step 4: Check MV-41 (External Reference Frequency).
a) Should display the lead sensor frequency.
b) If not, check signal at External Reference Frequency input, and the configuration jumpers per Chapter 2
of the “M-Drive User Manual”.
Step 5: Check MV-45 (Scaled Reference).
a) Should not be zero.
b) If zero, press “SETSPEED” and enter a non-zero ratio setpoint.
c) Check CP-11 (Maximum Limit) and enter a value greater than CP-37 (RPM Fdbk Secondary Max).
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