FP
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User's Manual
11.10 No RS232C Communication
271
11.10 No RS232C Communication
A communication error can be detected when monitoring the special relays for serial
communication.
•
Check whether the RD terminal of a connected device is connected to the SD terminal
of the communication cassette, and that SD is connected to RD. Make sure SG is
connected.
•
Check that link areas do not overlap.
When using FPG-COM1:
Data cannot be sent unless the pin CS (Clear to Send) is on. When connecting to a three-wire
port, short-circuit the RS and CS pins.
•
Check if the CS signal is TRUE. If the LED COM.2 R on the CPU is off, the CS signal
is FALSE.
•
RS (Request to Send) can be controlled by the SYS1 instruction.
Summary of Contents for FPS Series
Page 7: ......
Page 17: ......
Page 18: ...Chapter 1 Safety Measures...
Page 21: ......
Page 22: ...Chapter 2 Overview...
Page 32: ...Chapter 3 CPU Types...
Page 47: ...CPU Types FP User s Manual 30 LD Body...
Page 51: ...CPU Types FP User s Manual 34 POU Header and LD Body...
Page 55: ...CPU Types FP User s Manual 38 LD Body...
Page 57: ......
Page 58: ...Chapter 4 Expansion...
Page 73: ......
Page 74: ...Chapter 5 I O Allocation...
Page 81: ......
Page 82: ...Chapter 6 Installation and Wiring...
Page 115: ......
Page 116: ...Chapter 7 High Speed Counter and Pulse Output...
Page 169: ......
Page 170: ...Chapter 8 Communication...
Page 227: ...Communication FP User s Manual 210 LD Body ST Body...
Page 233: ...Communication FP User s Manual 216 POU Header LD Body...
Page 236: ...FP User s Manual 8 6 Program Controlled Communication 219 POU Header LD Body 1 2...
Page 237: ...Communication FP User s Manual 220 2 2 ST Body...
Page 266: ...Chapter 9 Security Functions...
Page 273: ......
Page 274: ...Chapter 10 Other Functions...
Page 277: ......
Page 278: ...Chapter 11 Troubleshooting...
Page 289: ......
Page 290: ...Chapter 12 Appendix...