Mitsubishi FX3G-485-BD - Page 534

F-54
FX Series PLC User's Manual - Data Communication Edition
Non-Protocol Communication (RS/RS2 Instruction)
8 Creating Programs (RS2 Instruction)
8.1 Checking Contents of Related Devices
2. Word devices
Device
Name Description R/W
ch0
*1
ch1 ch2
D8062 D8063 D8438
Serial
communication
error code
When the serial communication error flag turns ON, this device
stores the corresponding error code.
R/W
D8370 D8400 D8420
Communication
format setting
This device sets the communication format. R/W
D8372 D8402 D8422
Amount of
remaining send
data
This device stores the amount of remaining send data. R
D8373 D8403 D8423
Amount of data
already received
This device stores the amount of data already received. R
D8375 D8405 D8425
Communication
parameter
display
This devices stores communication parameters set in the PLC. R
D8379 D8409 D8429
Time-out time
setting
This device sets the timeout time. R/W
D8380 D8410 D8430
Header 1 and
header 2
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.
R/W
D8381 D8411 D8431
Header 3 and
header 4
R/W
1 2 3 4Data
Header
Header ch0 ch1 ch2
Initial
value
1
D8380
(lowest-order
byte)
D8410
(lowest-order
byte)
D8430
(lowest-order
byte)
H02
(STX)
2
D8380
(highest-order
byte)
D8410
(highest-order
byte)
D8430
(highest-order
byte)
H00
3
D8381
(lowest-order
byte)
D8411
(lowest-order
byte)
D8431
(lowest-order
byte)
H00
4
D8381
(highest-order
byte)
D8411
(highest-order
byte)
D8431
(highest-order
byte)
H00