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FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
16 External FX Device – FNC 80 to FNC 89
16.8 FNC 87 – RS2 / Serial Communication 2
11
FNC30-FNC39
Rotation and
Shift
12
FNC40-FNC49
Data Operation
13
FNC50-FNC59
High Speed
Processing
14
FMC60-FNC69
Handy
Instruction
15
FNC70-FNC79
External FX I/O
Device
16
FNC80-FNC89
External FX
Device
17
FNC100-FNC109
Data
Transfer 2
18
FNC110-FNC139
Floating Point
19
FNC140-FNC149
Data
Operation 2
20
FNC150-FNC159
Positioning
Control
Cautions
→ For other cautions, refer to the Data Communication Edition.
• Do not drive two or more RS (FNC 80) and/or RS2 (FNC 87) instructions for the same port at the same time.
• It is not permitted to use an RS (FNC 80)/RS2 (FNC 87) instruction and an IVCK (FNC270)/IVDR (FNC271)/IVRD
(FNC272)/IVWR (FNC273)/IVBWR (FNC274)/FLCRT (FNC300)/FLDEL (FNC301)/FLWR (FNC302)/FLRD
(FNC303)/FLCMD (FNC304)/FLSTRD (FNC305) instruction for the same port.
• When using a header and terminator, set the data in the header and terminator to corresponding devices (D) before
executing the RS2 instruction. Do not change the values of the header and terminator while the RS2 instruction is
being executed.
Function Changes According to Versions
Compatible Versions
Item Function Summary
FX3G FX3U FX3UC
Ver. 1.00 or later Ver. 2.30 or later Ver. 2.30 or later
ch1
Data Set Ready (DSR) Flag
Turns the special device M8405 ON when
the DR (DSR) signal of ch1 is ON.
ch2
Data Set Ready (DSR) Flag
Turns the special device M8425 ON when
the DR (DSR) signal of ch2 is ON.