Mitsubishi Electric FR-A500 Instruction Manual page 241

You can select whether error reset from CC-Link communication is allowed or
disallowed (when used with the plug-in option, FR-A5NC).
1) Addition of Pr.349 "error reset selection during CC-Link communication"
When used with the CC-Link communication option (FR-A5NC), an error reset command (RY1A) from
network can be made invalid in the external operation mode or PU operation mode .
Parameter Name
Error reset selection
349 during CC-Link
communication
Which resetting method is allowed or disallowed in each operation mode is described below.
Resetting Method
Reset from CC-Link
communication
(PLC program)
Connect terminals RES-SD
Switch off inverter power
Reset from PU/DU
Note: 1. When parameters are copied from the inverter without the above function, the Pr.349 setting
becomes "0" (error reset enabled).
2. When a communication line fault has occurred, reset cannot be made from the PLC.
3. The inverter is set to the external operation mode if it has been reset in the network operation
mode.
Therefore, to resume the network operation, the inverter must be switched to the network
operation mode again. (When any of "1, 2, 10, 12, 20, 22" is set in Pr.340 "link start up mode
selection", switching is not necessary.)
4. Communication stops for about 1s during inverter reset.
Setting
Range Increments
0,1
Inverter reset
Pr.349=0
Error reset (RY1A) at
inverter fault
Pr.349=1
Inverter reset
Error reset at inverter fault
Setting Factory
Setting
0: Error reset (RY1A) is enabled independently of
1 0
1: Error reset (RY1A) is enabled only in the network
Network operation
Allowed
Allowed
Allowed
Allowed
Allowed
Allowed
232
OPTIONS
Function
operation mode
operation mode
Operation Mode
External operation
Disallowed
Allowed
Disallowed
Allowed
Allowed
Allowed
Allowed
PU operation
Disallowed
Allowed
Disallowed
Allowed
Allowed
Allowed
Allowed