Accessing Cpu Buffer Memory Access Device - Mitsubishi Electric MELSEC IQ-R series Reference Manual

Accessing CPU buffer memory access device

Access the buffer memory of RCPU.
U \
Extension Device code
ifi ti
The following device access commands can be used for access.
Function
Batch read
Batch write
Random read
Random write
Batch read multiple blocks
Batch write multiple blocks
Register monitor data
Message format for device extension specification
■Data communication in ASCII code
Subcommand type
For MELSEC iQ-R series
■Data communication in binary code
Subcommand type
For MELSEC iQ-R series
Data to be specified
■Extension specification
Specify the start input/output number of CPU module with the upper 3 digits of 4-digit in hexadecimal.
• ASCII code: Specify U (55H) at the head of data. Convert the numerical value to 3-digit ASCII code (hexadecimal), and
send it from the upper digits.
• Binary code: Send 2-byte numerical values from the lower byte (L: bits 0 to 7).
The start input/output numbers of CPU modules to be specified are as shown below.
CPU number
CPU No.1
CPU No.2
CPU No.3
CPU No.4
Ex.
APPENDICES APPENDIX
444
Appendix 1 Read/Write by Device Extension Specification
Device number
Command
0401
1401
0403
1402
0406
1406
0801
ASCII code
Extension specification
U
0 0 3 E 0
55 33
30 30 45 30
H H H H H H
Binary code
Device
Device number
code
00 00
H H
(4 bytes) (2 bytes)
Start input/output number of CPU module
3E00H
3E10H
3E20H
3E30H
Device code
0 0 0
30 30 30
H H H
(4 digits)
Extension
specification
00 00 FA
H H H
Subcommand
0082
0082
0082
0082
0082
0082
0082
Device number
(10 digits)
Value to be specified
3E0H
3E1H
3E2H
3E3H
0 0 0 0
30 30 30
30
H H H H