Mitsubishi FX3U-232-BD User Manual page 488

FX Series PLC User's Manual - Data Communication Edition
Non-Protocol Communication (RS/RS2 Instruction)
8.2.1 Applicable frames
Message frames used in communication can be selected by setting the communication format.
The table below shows message frames applicable to the RS2 instruction.
1
2
3
4
5
6
7
Header
8
Header
9
Header
10
Header
11
Header
12
Header
1. Header
When "header provided" is selected in the communication format settings, the values of D8410 and D8411
are used for ch.1, and the values of D8430 and D8431 are used for ch.2.
Up to four headers can be set.
Header
ch1
ch2
When data is sent, the data set in the devices above is added at the head of the specified send data.
When data is received, receiving begins when the data set in the devices above is received continuously.
Even if "header provided" is selected, headers are not provided if header 1 is set to "00H".
The area before 00H (
Cautions
Set the header before driving the RS2 instruction. Do not change the setting while the RS2 instruction is
being driven.
F-50
Data
Data CR+LF
Data Terminator
Data Terminator
Data Terminator
Data Terminator
Data
Data CR+LF
Data Terminator
Data Terminator
Data Terminator
Data Terminator
Header 1
D8410 (lowest-order byte) D8410 (highest-order byte)
D8430 (lowest-order byte) D8430 (highest-order byte
) is used to set the headers.
in 1-byte units
CR+LF
Sum check
Sum check CR+LF
CR+LF
Sum check
Sum check CR+LF
Header 2 Header 3
D8411 (lowest-order byte)
D8431 (lowest-order byte)
8 Creating Programs (RS2 Instruction)
8.2 How to Use RS2 Instruction
Header 4
D8411 (highest-order byte)
D8431 (highest-order byte)