Siemens HydroRanger 200 HMI, Руководство по эксплуатации

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Communications
C.40 Communication troubleshooting
HydroRanger 200 HMI
346
Operating Instructions, 06/2018, A5E36281317-AC
C.40 Communication troubleshooting
C.40.1 General
1. Check the following:
–
There is power in the unit.
– The LCD is showing the relevant data.
2. Check the wiring pin outs and verify that the connection is correct.
3. Verify that the settings in the computer used to communicate with the unit match the
values in the set-up parameters listed below:
Parameter
Protocol (4.4.) (Page 268)
Device Address (4.2.) (Page 267)
Serial Baud Rate (4.5.) (Page 268)
Parity (4.6.) (Page 269)
Data Bits (4.7.) (Page 269)
Stop Bits (4.8.) (Page 269)
Modem Available (4.9.) (Page 269)
Modem Inactivity Timeout (4.10.) (Page 270)
4. Check that the port on the computer is correct. Sometimes, trying a different Modbus
driver will solve the problem.
C.40.2 Specific
1. The device is set to communicate via a modem but no communication is returning to the
master.
–
Check that the parameters are set up correctly and that the correct port is configured
– Verify the wiring diagram. Note that there is a difference between wiring directly to a
computer and wiring to a modem.
– Verify that the modem is set up correctly. Siemens has a series of application guides
that may help. Please contact your local Siemens representative for more information
on application guides.
2. A device parameter is set via remote communications, but the parameter remains
unchanged.
–
Some parameters can only be changed when the device is not scanning. Try putting
the device in PROGRAM mode, using the operating mode function.
– Try setting the parameter from the keypad. If it can not be set using the keypad, check
Write Protection (5.1.) (Page 271) and set it to 1954.