Mitsubishi Electric FX5-DP-M, User Manual

Page: 155 / 176

APPX
Appendix 3 Buffer Memory
153
A
■
Normal response format for READ service
■
Abnormal response format for READ service
Address Bit Name Description Stored value
Un\G25121

Request
instruction
No.1 area READ Normal
response code Stores the response code that occurs when data read from
the DP-Slave is completed successfully. A400H
Un\G25122 b8 to
b15 CommRef number Sets the CommRef number. 0H
b0 to b7 FDL address Stores the FDL address of the read DP-Slave. 0 to 125
Un\G25123

Data length Stores the read data length. (Unit: Bytes) 1 to 240
Un\G25124

Slot number Stores the read slot number. 0 to 254
Un\G25125  Index Stores the read index. 0 to 255
Un\G25126 to
Un\G25245  Data Stores the read data.
• If the index set in the READ request is shorter than the data length, only the read data
is stored.
• If the index set in the READ request is longer than the data length, only the set data
length is stored.
Un\G25246 to
Un\G25248

Empty (fixed to 0)
Un\G25249 to
Un\G25376

Request
instruction
No.2 area Same as the request instruction No.1 area.

Un\G26017 to
Un\G26144  Request
instruction
No.8 area Same as the request instruction No.1 area.
Address Bit Name Description Stored value
Un\G25121

Request
instruction
No.1 area READ Abnormal
response code Stores the response code that occurs when an error occurs in
reading data from the DP-Slave.

Page 117 List of
Status Codes
Un\G25122 b8 to
b15 CommRef number Sets the CommRef number. 0H
b0 to b7 FDL address Stores the FDL address of the read DP-Slave. 0 to 125
Un\G25123

Detailed status code
1 • Other than FFFFH:

Page 117 List of Status Codes
• FFFFH: Detailed status code 1 does not exist.
Un\G25124

Detailed status code
2 • Other than FFFFH:

Page 117 List of Status Codes(Refer to the DP-Slave manual
if the status code is not in the list)
• FFFFH: Detailed status code 2 does not exist.
Un\G25125  Detailed status code
3 Refer to the manual of the DP-Slave.
Un\G25126 to
Un\G25248  Empty (fixed to 0)
Un\G25249 to
Un\G25376

Request
instruction
No.2 area Same as the request instruction No.1 area.

Un\G26017 to
Un\G26144  Request
instruction
No.8 area Same as the request instruction No.1 area.