Mitsubishi Electric FR-A500 Instruction Manual page 244

3) Pr. 502 "communication error-time stop mode selection"
You can select the inverter operation if a communication line fault or a fault of the option itself occurs.
Parameter Number
502
About settings
• At fault occurrence
At Fault Occurrence
Pr. 502
Fault
Setting
Operation
0
1
Continued
2
Coast to
0
stop
Decelerated
1,2
to stop
*If the fault status returns to the normal communication status within the time set in Pr. 500, a communication
line fault (E, OP3) dose not occur.
REMARKS
1. A communication line fault [E.OP3 (alarm data: HA3)] is a fault that occurs on the communication line, and a fault of
the option itself [E. 3 (alarm data: HF3)] is a communication circuit fault in the communication option.
2. The alarm output is the ABC contact output or alarm bit output.
3. When the setting was made to provide an alarm output, the fault definition is stored into the alarm history. (The fault
definition is written to the alarm history when an alarm output is provided.) When no alarm output is provided, the fault
definition overwrites the alarm indication of the alarm history temporarily, but is not stored. After the fault is removed,
the alarm indication is reset and returns to the ordinary monitor, and the alarm history returns to the preceding alarm
indication.
4. When the Pr. 502 setting is 1 or 2, the deceleration time is the ordinary deceleration setting (e.g. Pr. 8, Pr. 44, Pr. 45,
Pr. 111).
5. The acceleration time at a restart is the ordinary acceleration setting (e.g. Pr. 7, Pr. 44, Pr. 110).
6. When the Pr. 502 setting is 2, the operation/speed command at a restart is the one given before the fault occurrence.
7. When a communication line fault occurs at the Pr. 502 setting of 2, removing the fault during deceleration causes
acceleration to restart at that point. (Acceleration is not restarted if the fault is that of the option itself.)
Setting Range
0, 1, 2
Error Recognition after Elapse of
Alarm
Indication Operation
output
Coast to
stop
Normal Not
indication provided
Decelerated
(*) (*)
to stop
Coast to
E. 3 lit Provided
stop
E. 3 lit after Provided Decelerated
stop after stop to stop
Minimum Setting Increments
1
Pr. 500 Time
Alarm
Indication
output
E.OP3 lit Provided
Provided
after stop
E.OP3 lit
after stop
Not
provided
E. 3 lit Provided
E. 3 lit after Provided
stop after stop
235
OPTIONS
Factory Setting
0
At Fault Removal
Alarm
Operation Indication
output
Kept E.OP3 kept
Provided
stopped lit
Normal Not
Restart
indication Provided
Kept
E. 3kept lit Provided
stopped
8