Message Formats Of Each Protocol; Format 1 - Mitsubishi Electric MELSEC IQ-R series Reference Manual

4.2

Message Formats of Each Protocol

This section explains the message format and setting data per each format.

Format 1

Message format
■Request message
Control code
Frame ID No.
ENQ
05
H
■Response message (Normal completion: Response data)
Control code
Frame ID No.
STX
02
H
■Response message (Normal completion: No response data)
Control code
Frame ID No.
ACK
06
H
■Response message (Abnormal completion)
Control code
Frame ID No.
NAK
15
H
Setting data
Set the following items.
Item
Control code
(ENQ, STX, ACK, NAK, ETX)
Frame ID No.
Access route
Request data
Response data
Sum check code
Error code
Access route Request data
Sum check range
Access route Response data
Sum check range
Access route
Access route Error code
Description
A code is defined for control.
Specify the frame to be used.
Specify the access route.
Set the command that indicates the request content. Refer to "Request
data" rows of each command.
Store the read data for the command. Refer to "Response data" rows of
each command.
The value of the lower one byte (8 bits) of the additional result regarding
the data in the sum check target range as a binary data.
Error code indicates the content of occurred error.
Sum check code
Control code
Sum check code
ETX
03
H
Reference
Page 34 Control code
Page 36 Frame ID No.
Page 45 ACCESS ROUTE
SETTINGS
Page 62 COMMANDS AND
FUNCTIONS
Page 36 Sum check code
Page 38 Error code
4 MESSAGES OF SERIAL COMMUNICATION MODULE
4.2 Message Formats of Each Protocol
4
29