Details Of Related Devices (Rs2 Instruction) - Mitsubishi Electric FX3U-232-BD User Manual

FX Series PLC User's Manual - Data Communication Edition
Non-Protocol Communication (RS/RS2 Instruction)
2. Word devices
Device
ch0 ch1
D8062 D8063 D8438
D8370 D8400 D8420
D8372 D8402 D8422
D8373 D8403 D8423
— D8405 D8425
D8379 D8409 D8429
D8380 D8410 D8430
D8381 D8411 D8431
D8382 D8412 D8432
D8383 D8413 D8433
D8384 D8414 D8434
D8385 D8415 D8435
D8386 D8416 D8436 Sending sum
D8389 D8419 D8439
R: Read only
W: Write only
R/W: Read or Write
12.4

Details of Related Devices (RS2 Instruction)

Available channels vary depending on the main unit.
For details, refer to Section 3.2.
12.4.1 Serial communication error [M8062, M8063 and M8438]
These devices turn ON when an error occurs during serial communication.
1. Detailed contents
These devices work as serial communication error flags.
M8062 turns ON when an error occurs in serial communication using communication port ch0.
M8063 turns ON when an error occurs in serial communication using communication port ch1.
M8438 turns ON when an error occurs in serial communication using communication port ch2.
When M8063 turns ON, a corresponding error code is stored in D8063.
When M8438 turns ON, a corresponding error code is stored in D8438.
2. Cautions on use
Serial communication errors are not cleared even when communication is restored.
Cleared when the power is turned off and on.
Name
ch2
Serial
When the serial communication error flag turns ON, this device
communication error
stores the corresponding error code.
code
Communication
This device sets the communication format.
format setting
Amount of
This device stores the amount of remaining send data.
remaining send data
Amount of data
This device stores the amount of data already received.
already received
Communication
This device stores communication parameters set in the PLC.
parameter display
Time-out time
This device sets the timeout time.
setting
Header 1 and
header 2
These devices set the headers 1 to 4.
Header 3 and
header 4
Terminator 1 and
terminator 2
These devices set the terminators 1 to 4.
Terminator 3 and
terminator 4
Receiving sum
This device stores the received sum check value.
(receive 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.
Operation mode
This device stores the communication type being used.
display
12.4 Details of Related Devices (RS2 Instruction)
Description
12 Related Data
A
R/W
R
B
R/W
R
C
R
R
R/W
R/W
D
R/W
R/W
R/W
E
R
R
R
F
R
G
H
I
Apx.A
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