Installation, Operation, & Maintenance
26
MMC Hardware Manual
G & L Motion Control Inc.
diagnostics run, the Diagnostic light will be in one of the following
states:
•
off, indicating that the MMC is operating correctly.
•
on, indicating that the power-up diagnostics found a hard-
ware problem with the MMC.
3.8.5
Run-time Diagnostic Status
When the application is running (the Scan light is on), the Control
constantly monitors the system for proper operation, and the yellow
Diagnostic light (D) will be in one of the following states:
•
off, indicating that the MMC is operating correctly.
•
flashing a three digit error code (see
)
•
continuously pulsing from bright to dim, indicating one of
the following:
•
The Servo Setup Function used in the ladder was
compiled with a PiCPro version prior to 16.0.
Recompile the Servo Setup Function, then compile
and download the ladder with PiCPro 16.0 or
greater.
•
The application has accessed an array element
beyond the defined array boundary. Avoid this prac-
tice.
•
A UDFB is not preceded by the recommended
Enable/OK lines. Precede UDFBs with Enable/OK
lines as recommended in the Software Manual.
•
An internal software error has occurred. Consult the
factory.
NOTE
Power-up diagnostics are run only when the system is powered up. It
is possible that a failure might occur during operation. If so, the Diag-
nostic light remains off. If you suspect that the MMC might be defec-
tive, cycle power to run diagnostics again.
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