Mitsubishi Electric MELSEC Q Series Programming Manual page 224

6 TROUBLESHOOTING
Error Detail
code code Error contents
(SD32) (SD33)
Speed monitor
116
request timeout
Axis stop time
120
Speed exceeding
monitoring
parameter
block No.
Small oscillation
121
error
Safety observation
Error code
132 internal processing
(Note-7)
error
PLC CPU scan

140
time error
0000H
Process cycle error
of safety
141
observation of
Motion CPU
0001H
Voltage inside

150
module error
Temperature inside

151
module error
220 Servo amplifier
Axis No.
(Note-1)
loading error
Encoder loading
221 Axis No.
error
Safety
222 communication error
(PLC CPU side)
Error code
Safety
(Note-8)
communication
223
error (Motion CPU
side)
Safety
224 communication
connection error
Axis No.
Safety
225 communication
cycle setting error
Table 6.1 Safety observation error list (Continued)
Error cause
The preliminary check before starting
speed monitor is not finished within the
specified time.
(Such as when the speed monitor request
signal is turned on during the motor
deceleration.)
A status that the axis is at a stop continued
for over an hour during the speed monitor
that uses external auxiliary pulses.
At a small oscillation, consistency of the
change the feedback position from motor
encoder and the change of external
auxiliary pulse input did not match.
An error is detected at the internal process
check for safety observation.
The scan time of PLC CPU reached 25ms
or more.
The process cycle of safety observation of
Motion CPU reached 25ms or more.
The safety observation processing
execution time of the Motion CPU
exceeded the limit.
The power supply voltage inside the Motion
CPU is in error.
The Motion CPU is overheated.
The servo amplifier that was set by safety
communication parameter does not support
the safety communication function.
The encoder type set by safety
communication parameter is different to the
encoder type that is mounted.
An error is detected in the internal process
check for safety communication.
An error is detected for safety
communication connection.
The safety communication cycle setting is
different to the safety communication cycle
setting of the servo amplifier.
Corrective action
Review the timing of when turning on the
speed monitor request signal.
During the safety operating stop that uses
external auxiliary pulses, turn on the small
oscillation request signal within an hour and
execute the small oscillation operation.
Check the machine connection of the external
auxiliary pulse input.
Check the machine connection of the motor.
Check if the consistency of the motor travel
and the external auxiliary pulse input travel
matches.
For the external auxiliary pulse input, set the
A/B-phase mode.
Confirm the ON status of the in-position signal
before executing small oscillation.
Explain the error symptom and get advice
from our sales representative.
Set the scan time to 25ms or less such as by
reducing the program or adding a PLC CPU.
Check the software version (serial No.) of the
PLC.
Reduce the number of steps of the user
safety sequence program so that the process
cycle of safety observation is 25ms or less.
Explain the error symptom and get advice
from our sales representative.
Lower the temperature inside the control
panel.
If the error cannot be resolved even after
temperature was lowered, explain the error
symptom and get advice from our sales
representative.
Connect a servo amplifier that supports safety
communication function.
Check that the encoder type set in the safety
communication parameter and the encoder
type that is mounted are matching.
Explain the error symptom and get advice
from our sales representative.
Check the connection of the SSCNET /H
cable.
Set the same setting for the safety
communication cycle of the servo amplifier
and the Motion CPU.
6 - 5
Relevant CPU
PLC Motion Reset
CPU CPU

(Note-6)











(Note-2)
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