Panasonic MINAS A6 Multi Series Technical Reference page 304

PSM
alarm
PSM alarm name
number
15 PSM main power current
detection circuit alarm
16 PSM regenerative
transistor short circuit
alarm
17 PSM self check alarm
18 PSM EEPROM check
alarm 1
19 PSM EEPROM check
alarm 2
20 PSM EEPROM check
alarm 3
21 PSM EEPROM check
alarm 4
22 PSM detection of excess
number of connected
driver module alarm
23 PSM inter-module
communication timeout
alarm
24 PSM inter-module
communication CRC
alarm
26 PSM inter-module
communication ID setting
alarm
Cause of alarm
An abnormality was detected in the current
detection value of the main power supply DC
bus of the power supply module at the timing of
transition from the main power supply cutoff
state to the main power supply established
state.
An overload abnormality of the regenerative
drive circuit was detected.
When initializing the power supply module, an
abnormality was detected by self-diagnosis of
the microcomputer.
An error was detected in the EEPROM of the
power supply module.
After starting the power supply module, more
than maximum number of connections driver
modules were detected by inter-module
communication during the search for driver
module period.
Replies to driver modules connected via
inter-module communication were not received
more than the specified number of times.
1) The communication cable between
modules is disconnected.
2) When the control power supply was shut
down, the power supply module was still
operating, and only a part of the driver
modules were reset, and the control power
supply was turned on again.
3) Inter-module communication of some
driver modules has become abnormal.
4) Power supply module failure:
Related circuit is broken.
A CRC error was continuously detected more
than the specified number of times in the
response data from the driver module
connected by inter-module communication.
After starting the power supply module, the
driver module set with inter-module
communication node address (ID) = 1 was not
found during the the search for driver module
period.
Power Supply Module
Measures of alarm
Turn off the power and then turn it on again.
Confirmation of regenerative resistor wiring and
resistance value.
If the alarm still occurs, there is a possibility of
failure of temperature detection circuit.
Discontinue use and replace the power supply
module.
Save the power supply module parameters to
EEPROM and turn on the control power again.
If the alarm still occurs with the display, there is
a possibility of failure.
Discontinue use and replace the power supply
module.
Reduce the number of driver modules to
maximum number of connections or less.
For maximum number of connections, refer to
"REFERENCE SPECIFICATIONS Power
supply module section (SX-DSV03452)".
Check the normal operation of the inter-module
communication circuit / communication cable
and interconnected power supply module /
driver module.
1) Check the wiring of the inter-module
communication cable.
2) After confirming that the power supply
module and all the driver modules are in
the power-off state, turn on the control
power.
3) Check that all driver modules are operating
properly.
4) Replace the power supply module.
Implement noise countermeasures.
 Correctly ground the power supply module
and driver module.
 Insert a noise filter and surge absorber into
the power line.
 Install a signal noise filter on each cable, input
/ output line, and power line connected to the
power supply module and driver module.
Check that the inter-module communication
node address (ID) setting DIP switch on the
driver module front panel is set correctly.
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