Mitsubishi Electric FX3G SERIES Programming Manual page 478

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
Cautions
• 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
FX3G
Ver. 1.00 or later
476
Compatible Versions
FX3U FX3UC
Ver. 2.30 or later Ver. 2.30 or later
16 External FX Device – FNC 80 to FNC 89
16.8 FNC 87 – RS2 / Serial Communication 2
→ For other cautions, refer to the Data Communication Edition.
Item
ch1
Data Set Ready (DSR) Flag
ch2
Data Set Ready (DSR) Flag
Function Summary
Turns the special device M8405 ON when
the DR (DSR) signal of ch1 is ON.
Turns the special device M8425 ON when
the DR (DSR) signal of ch2 is ON.