Chapter 18 Communicating Using 1E Frames; Message Format; Details Of Setting Data - Mitsubishi Electric MELSEC IQ-R series Reference Manual

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COMMUNICATING USING 1E FRAMES
This chapter explains the functions when accessing using 1E frame and their message format.
1E frame is compatible with the communication function supported by MELSEC-A series Ethernet interface modules.
Only the commands for 1E frame explained in this chapter can be used for 1E frame.
18.1

Message Format

This section explains the message format when communicating data using 1E frame.
Message format
■Request message
Header Subheader
■Response message (Normal completion: Response data)
Header Subheader
■Response message (Normal completion: No response data)
Header Subheader
■Response message (Abnormal completion)
Header Subheader
Setting data
Set the following items.
Item Description
Header A header of Ethernet. Normally, it is added automatically.
Subheader Set the command type.
PC No. Specify the network module station No. of an access target.
ACPU monitoring Set the wait time up to the completion of reading and writing processing.
timer
Request data Set the commands that indicates request content.
Response data For the response data, store the read data for the command at normal
completion. Refer to "Response data" rows of each command.
End code The command processing result is stored.
Abnormal code
18.2

Details of Setting Data

This section explains how to specify the common data items and their content in each message.
ACPU monitoring
PC No.
timer
End code Response data
End code
End code Abnormal code
Request data
Reference
Page 392 Header
Page 392 Subheader
Page 393 PC No.
Page 394 ACPU monitoring timer
Page 397 Read and Write Device Memory
Page 418 Read and Write Extended File Register
Page 432 Read and Write Buffer Memory of Special
Function Module
Page 395 End code, Abnormal code
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18.1 Message Format
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