Document History - Shandong Renke Control Technology RS-FX-N01 User Manual

5.1 device can not connect to a PLC or PC
possible reason:
1) computer has multiple COM ports, port selection is not correct.
2) device address error, or there is a duplicate device address (factory default all 1).
3) The baud rate, parity, data bits, stop bits error.
4) The master polling interval and response wait time is too short, it is required more
than 200ms provided.
5) 485 has turned off, or A, B line reversed.
6) the number of devices or the wiring too long, to be near the power supply,
plus booster 485, while increasing 120 Ω termination resistor.
7) USB drive switch 485 is not installed or damaged.
8) equipment damage.
6. Contact
Shandong RenKe Control Technology Co.,Ltd.
Post code：250101
Tel：+86-531-58720832
Fax：+86-531-67805165
Website address: www.temperaturehumiditysensor.com

7. Document History

V1.0 documents created.
8. Dimensions
Shandong RenKe Control Technology Co.,Ltd.
Manual wind transmitter (485 type)
11 www.temperaturehumiditysensor.com