Mitsubishi Electric MELSEC iQ-R Series User Manual page 178

Layer 2 message mode
The following describes the details of the buffer memory areas used for the 11-bit CAN-ID Layer 2 message mode and 29-bit
CAN-ID Layer 2 message mode.
■Message slot specific error code list (Un\G5001 to Un\G5042)
This area stores error codes of each message slot.
Address
Un\G5001
Un\G5002

Un\G5041
Un\G5042
The following table lists and describes the error codes stored in each message slot.
Error code
0000H
2000H
■Pre-defined Layer 2 message configuration (Un\G6000 to Un\G6167)
This area is used to determine if the corresponding Layer 2 message in 'Receive/Transmit process data' (Un\G10000 to
Un\G10293) is a transmit or receive message.
Address
Un\G6000
Un\G6001
Un\G6002
Un\G6003
Un\G6004
Un\G6005
Un\G6006
Un\G6007

Un\G6160
Un\G6161
Un\G6162
Un\G6163
Un\G6164
Un\G6165
Un\G6166
Un\G6167
*1 Initial value when the CPU module is powered off and on or reset
• Layer 2 message n parameters A and B define if the corresponding Layer 2 message in 'Receive/Transmit
process data' (Un\G10000 to Un\G10293) is used as a transmit or receive message. If Layer 2 message n is
not used, set Layer 2 message n parameters A and B to FFFFH to disable the message slot.
• If an invalid value is set in this area, 'Error status' (Un\G29.6) turns on, and the address where this error
occurred is stored in 'Buffer memory setting error display' (Un\G39).
• Change these settings during offline mode. When the RJ71CN91 transitions to the online mode, the
settings are enabled.
APPX
176
Appendix 2 Buffer Memory
Description
Layer 2 message 1 parameter A
Layer 2 message 1 parameter B
Layer 2 message 1 parameter C
Layer 2 message 1 parameter D
Layer 2 message 2 parameter A
Layer 2 message 2 parameter B
Layer 2 message 2 parameter C
Layer 2 message 2 parameter D

Layer 2 message 41 parameter A
Layer 2 message 41 parameter B
Layer 2 message 41 parameter C
Layer 2 message 41 parameter D
Layer 2 message 42 parameter A
Layer 2 message 42 parameter B
Layer 2 message 42 parameter C
Layer 2 message 42 parameter D
Description
Message 1 error code
Message 2 error code

Message 41 error code
Message 42 error code
Description
No error code
Receive buffer overflow
Layer 2 message 1 parameter
Layer 2 message 2 parameter

Layer 2 message 41 parameter
Layer 2 message 42 parameter
*1
Initial value
FFFFH
FFFFH
0000H
0000H
FFFFH
FFFFH
0000H
0000H

FFFFH
FFFFH
0000H
0000H
FFFFH
FFFFH
0000H
0000H