Mitsubishi Electric MELSEC IQ-R series Reference Manual page 450

Message format for device extension specification
■Data communication in ASCII code
Extension
0 0
specification
30 30
H H
■Data communication in binary code
Device number
00 00
H H
The following shows the correspondence of each data.
Extension specification,
Device
Direct memory
code
specification
J
\
+
Z
Extension specification
modification
Data to be specified
■Extension specification, device code, and device number
Specify the access target network No. and the offset value of the start input/output number for extension specification.
When indexing a network No. and start input/output number by "Extension specification modification", the values specified by
"Extension specification" will be the offset value.
When indexing a device number by "Device modification", the values specified by "Device number" will be the offset value.
For the data to be specified for each access device, refer to the following table.
Item
Link direct device
Module access device
CPU buffer memory access device
■Direct memory specification (only when communicating in binary code)
Specify the type of access device.
Item
Link direct device
Module access device
CPU buffer memory access device
Specify '0' when accessing devices other than link direct device, module access device, and CPU buffer memory access
device.
Binary code
Specify '0'.
00 00
H H
APPENDICES APPENDIX
448
Appendix 1 Read/Write by Device Extension Specification
Extension
Device
specification
code
modification
Extension Direct
Device Extension
specification memory
code specification
modification specification
Extension specification,
Direct memory
Device number
specification
U
+
Z
Device Extension specification
modification modification
Device
Device number
modification
Device
Device number
code
\
+ +
Z Z
Device
modification
Reference
Page 441 Data to be specified
Page 443 Data to be specified
Page 444 Data to be specified
Value to be specified
F9H
F8H
FAH
Device
Device number
code
X
+
Z
Device
modification