448
APPENDICES APPENDIX
Appendix 1 Read/Write by Device Extension Specification
Message format for device extension specification
■Data communication in ASCII code
■Data communication in binary code
The following shows the correspondence of each data.
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.
■Direct memory specification (only when communicating in binary code)
Specify the type of access device.
Specify '0' when accessing devices other than link direct device, module access device, and CPU buffer memory access
device.
Item Reference
Link direct device Page 441 Data to be specified
Module access device Page 443 Data to be specified
CPU buffer memory access device Page 444 Data to be specified
Item Value to be specified
Link direct device F9H
Module access device F8H
CPU buffer memory access device FAH
Binary code
Specify '0'.
00
30
H
30
H
Extension
specification
modification
Device
code
Device
modification
Extension
specification
Device number
00
H
00
H
Device
code
Extension
specification
modification
Direct
memory
specification
Device number
Extension
specification
J
U
Z Z
X
ZZ Z
Extension specification,
Direct memory
specification
Device
code
Extension specification,
Direct memory
specification
Device
code
Device
code
Device number
Device number
Device number
Extension specification
modification
Device
modification
Device
modification
Extension specification
modification
Device
modification
\\
++
+
++
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