Mitsubishi Electric MELSEC iQ-R Series - Data to be Specified in Commands

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10 BUFFER MEMORY ACCESS
10.2 Intelligent Function Module
By using the command (0601, 1601), MELSEC-QnA series special function modules can be accessed.
When accessing buffer memory of MELSEC-A series special function modules, use the command of 1C/1E frame.
•1C frame: Page 383 Read and write Buffer Memory of Special Function Module
• 1E frame: Page 432 Read and Write Buffer Memory of Special Function Module
Data to be specified in commands
This section explains the contents and specification methods for data items which are set in each command related to the
access to the intelligent function module buffer memory.
Start address
Specify the start address of the buffer memory to be read/written.
■Calculation method
To access the buffer memory of the intelligent function module which consisted of word units by byte unit, specify a start
address calculated by byte unit.
Calculate the start address as follows:
Start address = (Buffer memory address 2) + Additional value of a module
For the arbitrary additional value of the module, refer to the following section.
Page 159 Accessing buffer memory with calculating a start address
Ex.
When specifying Q62DA buffer memory address 18H
(18H2) + 1008H = 30H + 1008H = 1038H
■Data communication in ASCII code
Convert the numerical value to 8-digit (hexadecimal) ASCII code, and send it from the upper digits.
■Data communication in binary code
Send 4-byte numerical values from the lower byte (L: bits 0 to 7).
Ex.
When the start address is 1038H
Module Model Additional values when
calculating start address
CC-Link system master/local module AJ61QBT11, A1SJ61QBT11 2000H
Ethernet interface module AJ71QE71, AJ71QE71-B5, A1SJ71QE71-B2, A1SJ71QE71-B5 4000H
Serial communication module AJ71QC24, AJ71QC24-R2, AJ71QC24-4, AJ71QC24N, AJ71QC24N-R2,
AJ71QC24N-R4, A1SJ71QC24, A1SJ71QC24-R2, A1SJ71QC24N,
A1SJ71QC24N-R2
4000H
ASCII code Binary code
31H 30H 33H
38H30H
30H 30H 30H
00 0
0
10 8
3
38H
10H 00H 00H