Mitsubishi Electric MELSEC iQ-R Series User Manual page 95

Parameter save/Clear selection area
This area is used to select whether to save the parameter of the buffer memory in the flash ROM or clear the parameter saved
in the flash ROM.
■Parameter save/clear selection bit (Un\G1584)
This area is set whether to save the parameter of the buffer memory to the flash ROM or clear the parameter saved in the
flash ROM when 'Request for saving/clearing parameters to Flash ROM' (Y17) is turned on.
For the buffer memory area which data are saved , refer to the following.
Page 75 List of buffer memory addresses
0000H: Saving the parameter of the buffer memory to the flash ROM (Default value)
8000H: Clearing the parameters in the flash ROM At this time, the parameter of the buffer memory is not cleared.
Auto communication start setting area
This area is used to set the auto communication start.
■Auto communication start setting (Un\G1585)
Set whether to start the I/O communication automatically with the parameter saved in the flash ROM when the CPU module is
reset or powered off and on.
0: The I/O communication is not automatically started. (Default value)
1: The I/O communication is automatically started.
When a value other than 0 and 1 is set, the I/O communication is not automatically started.
Operation setting for bus off error area
This area is used to set whether to reset the CAN chip (communication chip) of the RJ71DN91 to restart the communication
when a bus off error occurs.
■Operation setting for bus off error (Un\G1586)
Set whether to reset the CAN chip (communication chip) of the RJ71DN91 to restart the communication when a bus off error
occurs.
Setting this area to "1" can restart the communication without resetting the CPU module.
Configure this setting before the I/O communication (before 'I/O communication request' (Y11) is turned on).
Setting this area to "1" after a bus off error occurred resets the CAN chip.
0: Stop the communication without resetting the CAN chip. (Default value)
1: Reset the CAN chip and restart the communication.
When a value other than 0 and 1 is set, the CAN chip is not reset.
• Check for bus off error
The bus off error occurrence can be checked with the LED and the value of the buffer memory area.
LED: The NS LED of the RJ71DN91 turns on in red.
Buffer memory: The number of error times is stored in 'Bus error counter' (Un\G434) and 'Bus off counter' (Un\G435).
• Processing after the CAN chip is reset
When the CAN chip is reset, the LED and the values of buffer memory areas turn in the following status.
LED: If the CAN chip is reset, the NS LED of the RJ71DN91 turns on in red, turns off, flashes in green, and turns on in green
in order.
Buffer memory: The values of 'Bus error counter' (Un\G434) and 'Bus off counter' (Un\G435) are not cleared even if the CAN
chip is reset.
APPX
Appendix 3 Buffer Memory
A
93