Mitsubishi Electric MELSEC iQ-R Series User Manual page 172

■EMCY message buffer (Un\G750 to Un\G859)
A maximum of 22 received EMCY messages are stored.
The buffer memory area is divided into the 11 stack buffer (Un\G750 to Un\G804) and 11 ring buffer (Un\G805 to Un\G859).
The stack buffer will store the first 11 EMCY messages received after power-on or after the EMCY message buffer was
cleared the last time.
The ring buffer will store the next eleven EMCY messages.
EMCY messages delivered thereafter will be added to the end of the ring buffer, and the oldest message at the top will be
deleted.
The stack buffer will not be overwritten.
To ensure that the EMCY data are handled in a consistent way, it is necessary to refresh the data before reading the EMCY
data.
( Page 157 Data exchange control (Un\G20), Page 148 Data exchange completed (X1), Data exchange request (Y1))
To clear the entire buffer area, turn on 'EMCY message area clear request' (Y11).
The following table lists the EMCY message buffer addresses.
Address Name
Un\G750 Node ID
Un\G751 EMCY data
Un\G752
Un\G753
Un\G754
: :
Un\G800 Node ID
Un\G801 EMCY data
Un\G802
Un\G803
Un\G804
Un\G805 Node ID
Un\G806 EMCY data
Un\G807
Un\G808
Un\G809
: :
Un\G855 Node ID
Un\G856 EMCY data
Un\G857
Un\G858
Un\G859
*1 The oldest message is stored.
*2 The latest message is stored.
*3 For details on emergency error codes, manufacturer-specific error codes, and error register, refer to the following.
Page 51 Emergency error codes
Page 52 Manufacturer-specific error code
Page 206 Error register
APPX
170
Appendix 2 Buffer Memory
Description
Buffer memory
area
*1
Stack buffer
*1*3
*2
*2*3
*1
Ring buffer
*1*3
*2
*2*3
Upper byte
The node-ID number of the node which sent the EMCY message to the network is displayed.
Emergency error code
Byte 0 of manufacturer-specific error code
Byte 2 of manufacturer-specific error code
Byte 4 of manufacturer-specific error code
:
The node-ID number of the node which sent the EMCY message to the network is displayed.
Emergency error code
Byte 0 of manufacturer-specific error code
Byte 2 of manufacturer-specific error code
Byte 4 of manufacturer-specific error code
The node-ID number of the node which sent the EMCY message to the network is displayed.
Emergency error code
Byte 0 of manufacturer-specific error code
Byte 2 of manufacturer-specific error code
Byte 4 of manufacturer-specific error code
:
The node-ID number of the node which sent the EMCY message to the network is displayed.
Emergency error code
Byte 0 of manufacturer-specific error code
Byte 2 of manufacturer-specific error code
Byte 4 of manufacturer-specific error code
Lower byte
Error register
Byte 1 of manufacturer-specific error code
Byte 3 of manufacturer-specific error code
:
Error register
Byte 1 of manufacturer-specific error code
Byte 3 of manufacturer-specific error code
Error register
Byte 1 of manufacturer-specific error code
Byte 3 of manufacturer-specific error code
:
Error register
Byte 1 of manufacturer-specific error code
Byte 3 of manufacturer-specific error code