Display And Erasure Of Communication Error Occurrence Count (Pr. 501) - Mitsubishi Electric 700 Series Instruction Manual
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5.14.4 Display and erasure of communication error occurrence count (Pr. 501)
The inverter operates as below at a communication error during FL remote communication.
Parameter
Name
Number
Communication error
501
occurrence count display
∗ The above parameter can be always read regardless of the Pr.160 User group read selection setting. (Refer to page 167)
(1)
Display and erasure of communication error occurrence count
The cumulative number of communication error occurrences can be indicated.
Writing "0" to Pr.501 erases this cumulative count.
At the point of communication line error occurrence, Pr.501 display is incremented by 1.
Count timing depending on
communication line status
NOTE
The communication error count occurrence is stored into RAM temporarily. Since this data is stored in EEPROM at
one-hour intervals, performing power-ON reset or inverter may cause the Pr. 501 data to be the value stored in
EEPROM the last time depending on the reset timing.
(2)
Inverter operation at communication error occurrence
The inverter operates as below at a communication line error or a fault in the FL remote communication circuit.
Operation at error occurrence
Error Definition
Communication line
FL remote communication
circuit in the inverter
Operation at error removal
Error Definition
Communication line
FL remote communication
circuit in the inverter
NOTE
Communication line error [E.OP1] is displayed when a fault occurs on the FL remote communication line.
The fault output indicates fault output signal (ALM signal) or alarm bit output.
The fault record is stored into the faults history. (The fault record is written to the faults history when a fault output is
provided.)
After the error is removed, the fault indication is reset and returns to the ordinary monitor, and the faults history
returns to the preceding fault indication.
The deceleration time is the ordinary deceleration time setting (e.g. Pr. 8, Pr. 44, Pr. 45).
Initial
Value
0
Normal
Operation
Decelerated to stop
E.OP1 lit after stop
Decelerated to stop
E.1 lit after stop
Operation
Kept stopped
Kept stopped
Operation setting at fault occurrence
Setting
Range
The cumulative number of communication error occurrences
0
can be indicated.
Writing "0" erases this cumulative count.
Error
Normal
Incremented by 1
Indication
Fault Output
Provided after stop
Provided after stop
Indication
Fault Output
E.OP1 kept lit
Kept provided
E.1 kept lit
Kept provided
Description
Error
Incremented by 1
5
161
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