Mitsubishi Electric MELSEC iQ-R Series User Manual page 83

Error code Error
(decimal) detection
257 RJ71DN91
258 RJ71DN91
300 RJ71DN91
301 RJ71DN91
302 RJ71DN91
303 RJ71DN91
304 RJ71DN91
305 RJ71DN91
306 RJ71DN91
317 Slave node
■Message communication data (Un\G304 to Un\G423)
The transmit/receive data of the message communication is stored.
• Reading the attribute data of the slave node
The read attribute data is stored in increments of bytes.
Buffer memory address
Un\G304

Un\G423
• Writing the attribute data to the slave node
Set the attribute data to be written in increments of bytes.
Buffer memory address
Un\G304

Un\G423
Description
The data length set in the buffer memory exceeds 241.
An illegal value is set for the command number in the
message communication command area of the buffer
memory.
The own node is in the offline state.
Message transmitting failed.
Response wait timeout occurred.
An illegal response has been obtained.
The node address set as the reserved node has been
specified.
A message is transmitted to the own node.
An error response is received from the slave node in the
connection open processing.
The response data length is too long.
Read attribute data
2nd byte
4th byte
6th byte

Attribute data to be written
2nd byte
4th byte
6th byte

Remedy
• The data length must be 240 or less.
• Set one of 0001H, 0101H, 0102H, 0201H, or FE**H for
the command number.
• Turn on 'I/O communication request' (Y11) to set the own
node in the online state.
• Perform the hardware test to check for a hardware
failure.
• Comprehensively check the status of the network and
slave node: if the terminating resistor comes off, and
others.
• Comprehensively check the status of the network and
slave node: if the terminating resistor comes off, and
others.
• Set a node address which is not set as a reserved node.
• Transmit a message with a specification of a node other
than the own node.
• Check that the message group of the parameter is
correctly set.
• Check that the transmit message can respond in the
slave node.
1st byte
3rd byte
5th byte

1st byte
3rd byte
5th byte

Appendix 3 Buffer Memory
A
APPX
81