Mitsubishi FX3U-232-BD User Manual page 486

FX Series PLC User's Manual - Data Communication Edition
Non-Protocol Communication (RS/RS2 Instruction)
2. Word devices
Device
ch1 ch2
D8063 D8438
D8400 D8420
D8402 D8422
D8403 D8423
D8405 D8425
D8409 D8429 Time-out time setting
D8410 D8430 Header 1 and header 2
D8411 D8431 Header 3 and header 4
D8412 D8432
D8413 D8433
D8414 D8434
D8415 D8435
D8416 D8436 Sending sum
D8419 D8439 Operation mode display This device stores the current communication being executed.
R: Read only
R/W: Read or Write
F-48
Name
Serial communication When the serial communication error flag turns ON, this device
error code stores the corresponding error code.
Communication format
This device sets the communication format.
setting
Amount of remaining
This device stores the amount of remaining send data.
send data
Amount of data already
This device stores the amount of data already received.
received
Communication
This devices stores communication parameters set in the PLC.
parameter display
This device sets the timeout time.
These devices set the headers 1 to 4.
When "H00" is set to the header 1, headers are not provided.
The area before H00 (in 1-byte units) is used to set the headers.
These devices set the terminators 1 to 4.
Terminator 1 and
terminator 2
Terminator 3 and
terminator 4
When "H00" is set to the terminator 1, terminators are not
provided.
The area before H00 (in 1-byte units) is used to set the
terminators.
Receiving sum (receive
This device stores the received sum check value.
data)
Receiving sum This device stores the sum check value calculated from the
(calculation result) received data.
This device stores the sum check value added to the send data.
Description
Header
1 2 3 4
Header ch1
1 D8410 (lowest-order byte)
2 D8410 (highest-order byte) D8430 (highest-order byte)
3 D8411 (lowest-order byte)
4 D8411 (highest-order byte) D8431 (highest-order byte)
Data 1
Termi-
ch1
nator
1 D8412 (lowest-order byte) D8432 (lowest-order byte)
2 D8412 (highest-order byte) D8432 (highest-order byte)
3 D8413 (lowest-order byte) D8433 (lowest-order byte)
4 D8413 (highest-order byte) D8433 (highest-order byte)
8 Creating Programs (RS2 Instruction)
8.1 Checking Contents of Related Devices
Data
ch2
D8430 (lowest-order byte)
D8431 (lowest-order byte)
Terminator
2 3 4
ch2
(ETX)
R/W
R/W
R/W
R
R
R
R/W
R/W
Initial
value
H02
(STX)
H00
H00
R/W
H00
R/W
Initial
value
H03
H00
H00
H00
R/W
R
R
R
R