Rockwell Automation 1398-PDM-xxx ULTRA Plus Series Positioning Drive Module - Manual (Page 135)

Publication 1398-5.1 — January 2000
Check for Problems in the System 5-7
43 Peak Overcurrent The GML current sensors detected a short circuit in the
motor leads. Check motor power cables for shorts.
44 Bus Overvoltage The DC bus voltage exceeded safe levels. This error
usually indicates that the power supply shunt is not
operating properly. Check the shunt fuse on the Power
Supply Module (1398 PDM-25, 50, 100, and 100).
See Figure 3.10 on page 3-15.
45
46 Encoder 1 Fault
Encoder 2 Fault Incorrect encoder signals were detected by the PDM
circuitry. The encoder signals may be out of quadrature
or an encoder signal is missing (broken wire).
47 Watchdog Test Fault The Watchdog circuitry test (performed at power up)
failed. The GML should be replaced.
48 Personality Fault A checksum error was detected in the personality data
for the GML. Reload the Personality Module from a
previously saved file, or replace the Personality
Module.
49 Watchdog Reset The watchdog timer is pulsed by the microprocessor
every millisecond to ensure that the microprocessor is
running properly. If the microprocessor fails to pulse
the watchdog, a Watchdog Reset fault occurs.
50 RAM R/W Fault The static RAM failed a test. The GML should be
replaced.
51 EPROM Checksum One of the EPROMs failed the checksum test at power
up. All three EPROMs, U66, U67, and U87 should be
replaced.
52 TEXT Checksum The text EPROM failed the checksum test at power up.
The text EPROM, U57, should be replaced.
(Continued)
No. Error Messages Description