Mitsubishi FX3U Series Programming Manual

468
FX3G/FX3U/FX3GC/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
16 External FX Device – FNC 80 to FNC 89
16.8 FNC 87 – RS2 / Serial Communication 2
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) to IVMC (FNC275)",
"FLCRT (FNC300) to 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 FX3GC FX3UC
Ver. 1.00
or later
Ver. 2.30
or later
Ver. 1.40
or later
Ver. 2.30
or later
ch1
Data Set Ready (DSR) Flag
Turns M8405 ON when the DR (DSR)
signal of ch1 is ON.
ch2
Data Set Ready (DSR) Flag
Turns M8425 ON when the DR (DSR)
signal of ch2 is ON.

Mitsubishi FX3U Series Specifications

General

Model	FX3U Series
Program Memory	64k steps
Execution Speed	0.065 μs/basic instruction
Type	PLC (Programmable Logic Controller)
Power Supply	100-240V AC
I/O Points	Up to 384
Communication	USB
Expansion	Supported via expansion modules
High-Speed Counters	Up to 6 channels
Analog Input/Output	Available via expansion modules
Temperature Range	0 to 55°C
Programming Language	Ladder Logic, Structured Text
Built-in Functions	PID control
Humidity	5 to 95% (non-condensing)