Mitsubishi Electric 800 Series Instruction Manual page 642

 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.
501 Communication error 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 inverter reset is performed, Pr.501 setting will be the one that is last stored to EEPROM depending
on the reset timing.
 Error reset and Ready bit status selection
• An error reset command from a communication option can be invalidated in the External operation mode or the PU
operation mode.
• The status of Ready bit is selectable.
Pr. Name
349 Communication reset selection/
Ready bit status selection/Reset
selection after inverter faults are
cleared/DriveControl writing
restriction selection
N010 Communication reset selection
N240 Ready bit status selection
N241 Reset selection after inverter faults
are cleared
N242 DriveControl writing restriction
selection
• The status of Ready bit in communication data can be changed when an HMS network option is installed. (P.N240)
• When an HMS network option is installed and the communication option is specified for the command source in Network
operation mode, it is possible to select whether the inverter is reset after the "Fault reset" command is executed. (P.N241)
Name
Normal Error
Initial value
0
0
0
0
0
Setting range Minimum setting
increments
0 1
Normal Error
Incremented by 1 Incremented by 1
Setting range
0, 1, 100, 101, 1000, Use this parameter to select the error reset
1001, 1100, 1101, operation, Ready bit status, inverter reset
10000, 10001, operation when a fault is cleared, and
10100, 10101,
DriveControl settings.
11000, 11001,
11100, 11101
0 Enables the error reset function in any
operation mode.
1 Enables the error reset function only in the
Network operation mode.
0 The status of Ready bit in communication
data can be selected.
1
0 The inverter is reset when a fault is cleared.
1 The inverter is not reset when a fault is
cleared.
0 DriveControl writing is not restricted.
1 DriveControl writing is restricted.
9.3 For customers using HMS network options
Initial value
0
Description
641
9. APPENDIX
3
4
5
5
5
5
5
5
9
10