Rockwell Automation 1771-PM , D17716.5.18 U MNL 1771-PM CLUTCH/BRAKE MOD - Manual (Page 101)

Troubleshooting
Chapter 7
7Ć17
HEX
CODE
TYPE PROBLEM CORRECTIVE ACTION
DOWNSTROKE MESSAGES
66
67 (ALT)
L ANTIĆREPEAT CAM SWITCH OPEN DURING DOWNSTROKE
During downstroke and before the near bottom zone, the antiĆ
repeat cam is on, the brake monitor cam is on, and the runĆon
cam is off. This message will occur if the PM sees the antiĆ
repeat cam signal go off during downstroke.
See Standard Corrective Action **
UPSTROKE MESSAGES
68
069 (ALT)
L RUNĆON CAM OPENED BEFORE SEEING THE
ANTIĆREPEAT CAM TRANSITION OT OFF"
Once the press is in the near bottom zone, the PM needs to see
a offĆon transition of the antiĆrepeat cam signal during the upĆ
stroke. If the runĆon cam opens before this transition, this
message will occur.
See Standard Corrective Action **
70 N RUN BUTTON RELEASED DURING FIRST UPSTROKE IN
CONTINUOUS MODE. INCH TO TOP.
This message appears when you select strokeĆandĆaĆhalf
for entering continuous mode you release one (or both)
RUN buttons during the first upstroke.
You must enter INCH mode and inch the press to the top to
continue normal press operation.
71 N SHAFT NEAR TOP. INCH TO TOP. You cannot enter single or continuous mode unless the
press is at proper near top" starting position. (figure 5.1).
Check CAM switch wiring. (figure 6.9).
BRAKE OR MOTION DETECTOR MESSAGES
72
73
L BRAKE OVERRUN"
BRAKE OVERRUN Ć INCH BACK TO TOP"
If the press has not stopped within the open window of the near
top position, this indicates that the press has traveled too far.
Code 73 means that the press was in the single stroke or
continuous mode and now must be inched back to the near top
position.
Check alignment of the runĆon and brake monitor cams to
conform to fig. 5.1 in the PM manual, and to assure
adequate and safe stopping distance before reaching the
brake monitor cam. Check the condition of the brake.
074
075
L MOTION DETECTOR SIGNAL IS LATE OR MISSING"
MOTION DETECTOR SIGNAL DISAPPEAR ON UPĆSTROKE.
The motion detector input signal must come on by the time the
brake monitor cam goes off. This message will also occur when
the press is in a upĆstroke and the motion detector signal
disappears.
Check for the proper dip switch settings. Check for proper
cam configuration and operation. Check for proper motion
detector feedback.
076 L MOTION DETECTOR SIGNAL DISAPPEARANCE DURING
ONĆHOP DOWNSTROKE"
A successful onĆhop operation was achieved, and during the
downĆstroke, the motion detector signal was missing for a time
period greater than 0.11 seconds.
Check for proper cam configuration and operation (see fig.
5.1). Check for proper motion detector feedback.