Mitsubishi Electric FX3U-232-BD User Manual page 610

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
F-60
Name
ch2
Serial
When the serial communication error flag turns ON, this device
communication
stores the corresponding error code.
error code
Communication
This device sets the communication format.
format setting
Amount of
remaining send This device stores the amount of remaining send data.
data
Amount of data
This device stores the amount of data already received.
already received
Communication
parameter This devices stores communication parameters set in the PLC.
display
Time-out time
This device sets the timeout time.
setting
These devices set the headers 1 to 4.
Header 1 and
header 2
Header 3 and
header 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.
Description
Header
1 2 3 4
Header ch0
D8380 D8410
1 (lowest-order (lowest-order
byte) byte)
D8380 D8410
2 (highest-order (highest-order
byte) byte)
D8381 D8411
3 (lowest-order (lowest-order
byte) byte)
D8381 D8411
4 (highest-order (highest-order
byte) byte)
8 Creating Programs (RS2 Instruction)
8.1 Checking Contents of Related Devices
Data
ch1 ch2
D8430
(lowest-order
(STX)
byte)
D8430
(highest-order
byte)
D8431
(lowest-order
byte)
D8431
(highest-order
byte)
R/W
R/W
R/W
R
R
R
R/W
R/W
Initial
value
H02
H00
H00
R/W
H00