Rockwell Automation 1771-PM , D17716.5.18 U MNL 1771-PM CLUTCH/BRAKE MOD - Manual (Page 94)

Troubleshooting
Chapter 7
7Ć10
Latched Messages (medium priority)
Latched messages occur when the PM module detects error conditions
while the press is running (clutch/brake solenoids are ON). The module:
stops press motion immediately
latches ON a diagnostic message
turns OFF solenoid valve triacs
(seal relays remain closed)
The latched-message condition remains until you correct the problem and
press the RESET LATCHED MSG pushbutton wired to chassis C.
Typical error conditions are equipment failures or improper mechanical
adjustments.
Example: If the barrier guard switch should open while the press is
running in continuous mode, the PM module would immediately turn OFF
the solenoid valve triacs and generate the following message code:
Error 09 (Hex)
Barrier guard dropout or absent
Latched Messages Followed by 0D" (corrective intervention)
Whenever a diagnostic message code is followed by the ”0D” message
code, the maintenance technician must reset the PM system by removing
control power, and then re-applying power. This forces the technician to
correct the problem before press operation can continue.
Standard Corrective Action
Because the ”0D” message code accompanies a variety of other diagnostic
message codes, we recommend a standard corrective action. Use it when
correcting faults for “OD” diagnostic message codes presented in Table
7.C.
Check for proper cam setting and operation.
(Refer to Figure 5.1 in this manual.)
Check for bad or frozen cam contacts
If more than one cam assembly is used for multi-speed press operation,
check switching of these cams.
Check for proper wiring of cam switches.
Check for proper wiring of I/O module swing arms.