Mitsubishi FX3U-232-BD User Manual page 525

FX Series PLC User's Manual - Data Communication Edition
Non-Protocol Communication (RS/RS2 Instruction)
12.4.14 Header [D8410, D8411, D8430 and D8431]
These devices set the headers 1, 2, 3 and 4.
1. Detailed contents
When "header provided" is selected in the communication format setting, the headers are set in the sent and
received data.
Up to four headers can be set in each channel.
When communication port ch1 is used, D8410 and D8411 set the headers.
When communication port ch2 is used, D8430 and D8431 set the headers.
The headers are set in the following order.
Header
ch1 D8410 (lowest-order byte)
ch2 D8430 (lowest-order byte)
When data is sent, the data set in the headers is added at
the head of the specified send data.
When data is received, receiving begins when the data set
in the headers is received.
2. Cautions on use
Even if "header provided" is selected, headers are not provided if header 1 is set to "H00".
The area before "H00" (in 1-byte units) is used to set the headers.
12.4.15 Terminator [D8412, D8413, D8432 and D8433]
These devices set the terminators 1, 2, 3 and 4.
1. Detailed contents
When "terminator provided" is selected in the communication format setting, the terminators are set in the
sent and received data.
Up to four terminators can be set in each channel.
When communication port ch1 is used, D8412 and D8413 set the terminators.
When communication port ch2 is used, D8432 and D8433 set the terminators.
The terminators are set in the following order.
Terminator
ch1 D8412 (lowest-order byte)
ch2 D8432 (lowest-order byte)
When data is sent, the data set in the terminators is added
at the end of the specified send data.
When data is received, receiving is completed when the
data set in the terminators is received.
2. Cautions on use
Even if "terminator provided" is selected, terminators are not provided if terminator 1 is set to "H00".
The area before "H00" (in 1-byte units) is used to set the terminators.
12.4.16 Receiving sum (receive data) [D8414 and D8434]
These devices store the received sum check value.
1. Detailed contents
When "sum check provided" is selected in the communication format setting, the sum check is executed for
the sent and received data.
These devices store the sum added to the received data sent from the external equipment.
When communication port ch1 is used, D8414 stores the receiving sum.
When communication port ch2 is used, D8434 stores the receiving sum.
2. Cautions on use
When selecting "sum check provided", make sure to also select "terminator provided".
Header 1 Header 2
D8410 (highest-order byte)
D8430 (highest-order byte
Terminator 1 Terminator 2
D8412(highest-order byte)
D8432 (highest-order byte)
12.4 Details of Related Devices (RS2 Instruction)
Header 3
D8411 (lowest-order byte) D8411 (highest-order byte)
D8431 (lowest-order byte) D8431 (highest-order byte)
Header
1 2 3 4
Terminator 3
D8413 (lowest-order byte) D8413 (highest-order byte)
D8433 (lowest-order byte) D8433 (highest-order byte)
Data 1
12 Related Data
A
B
Header 4 C
Data
D
E
F
Terminator 4
G
Terminator
2 3 4
H
I
Apx.
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