Mitsubishi Electric 800 Series Instruction Manual page 39

 Displaying and clearing the communication error count
The cumulative count of communication error occurrences can be displayed. Write "0" to clear this cumulative count.
Pr. Name
Communication error
501
occurrence count display
Count timing depending on
communication line status
At the point of communication line error occurrence, Pr.501 Communication error occurrence count display is incremented
by 1.
The cumulative count of communication error occurrences is counted from 0 to 65535. When the count exceeds 65535, the
displayed value is cleared and the counting starts over from 0 again.
NOTE
• Communication error count is temporarily stored in the RAM memory. The error count is stored in EEPROM only once per
hour. If power reset or converter reset is performed, Pr.501 setting will be the one that is last stored to EEPROM depending
on the reset timing.
 Inverter operation at a communication error occurrence
How the inverter operates at a communication line error or an option unit fault can be set.
Pr. Name
Stop mode selection at
502
communication error
Operation frequency during
*1
779
communication error
*1 Valid when Pr.502 = "6".
38
INVERTER SETTING
Setting range
0
Normal Error
Incremented by 1
Setting range
0 (Initial Value), 1, 2, 6
0 to 590 Hz
9999 (Initial Value)
Minimum setting
increments
1 0
Normal Error
Incremented by 1
Description
Refer to page 39
When a communication error occurs, the inverter operates at the
set frequency.
The inverter operates at the frequency set before the
communication error occurs.
Initial value