Batch Read (Command: Tr) - Mitsubishi Electric MELSEC IQ-R series Reference Manual

Batch read (command: TR)

Read the buffer memory of a special function module.
Message format
The following shows the message format of the request data and response data of the command.
■Request data
T R
Message wait
54 52
H H
■Response data
The value read from the buffer memory is stored.
2-digit ASCII code data is stored per 1 byte of buffer memory data.
Data specified by request data
■Command
ACPU common
T R
54 52
H H
■Message wait
Specify the delayed time of the response transmission. (Page 347 Message wait)
■Start address
Specify the start address of the buffer memory to be read in five digits. (Page 386 Start address)
■Byte length
Convert the numerical value to 2-digit ASCII code (hexadecimal), and send it from the upper digits.
Specify the byte length within the following ranges:
• 1  Byte length  128
■Special function module No.
Specify with 2 digits. (Page 386 Special function module No.)
The content of one data may cross 2 or 3 bytes depending on the special function module. For the
specifications of byte length, refer to the manual of each module.
17 COMMUNICATING USING 1C FRAMES
386
17.6 Read and write Buffer Memory of Special Function Module
Start address Byte length
Special function
module No.