Mitsubishi FX3U-232-BD User Manual page 519

FX Series PLC User's Manual - Data Communication Edition
Non-Protocol Communication (RS/RS2 Instruction)
12.2.16 Operation mode display [D8419]
This device stores the communication type being used.
1. Detailed contents
This device stores the code of the communication type currently being used by the communication port.
The table below shows the contents of the codes.
Code
0
2
3
4
5
6
7
2. Cautions on use
This device stores "4" while RS instruction is driven or when the RS instruction is not changed over to another
mode.
12.3 Related Devices (RS2 Instruction)
1. Bit devices
Device
ch1 ch2
M8063 M8438 Serial communication error
M8401 M8421 Sending wait flag
M8402 M8422 Sending request
M8403 M8423 Receiving complete flag
M8404 M8424 Carrier detection flag
*1 M8405 M8425 Data set ready (DSR) flag
M8409 M8429 Time-out check flag
R: Read only
R/W: Read or Write
*1. Available in Ver.2.30 or later of FX
Programming communication
Protocol dedicated to computer link
N:N Network
RS instruction
RS2 instruction
Parallel link
Inverter instruction
Name
or FX
3U
Description
Description
This device turns ON when a communication error occurs.
When this device (serial communication error) turns ON,
D8063 or D8438 stores the corresponding error code.
This device remains ON while the PLC is waiting to send.
When this device is set to ON, the PLC starts to send.
This device turns ON when receiving is completed.
While this device (receiving complete flag) is ON, the PLC
cannot receive any receive data.
This device turns ON in synchronization with the CD (DCD)
signal.
This device turns ON in synchronization with the DR (DSR)
signal.
This device turns ON when data receiving is suspended and
the next set of receive data is not given within the time set by
the time-out time setting device.
PLC
3UC
12 Related Data
12.3 Related Devices (RS2 Instruction)
R/W
R
R
R/W
R/W
R
R
R/W
F-81
A
B
C
D
E
F
G
H
I
Apx.