Siemens HydroRanger 200 Instruction Manual download pdf (Page 121)

7ML19981FCO1 HydroRanger 200 – INSTRUCTION MANUAL Page 107

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Error Handling

Communication Troubleshooting

Generally

1. Check the following:

• There is power at the unit

• The LCD is showing the relevant data

• The device can be programmed using the hand programmer

2. Check the wiring pin outs and verify that the connection is correct.

3. Verify that values in the set-up parameters (P770 to P779) match the settings in the

computer used to communicate with the unit.

4. Check that the port on the computer is correct. Sometimes trying a different Modbus

driver will solve the problem. An easy stand-alone driver called ModScan32 is

available from Win-Tech at www.win-tech.com. This driver is helpful for testing

communications.

Specifically

1. The HydroRanger 200 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.

Milltronics has a series of Application Guides that may help. Please contact your

local Siemens Milltronics representative for more information on Application

Guides.

2. A HydroRanger 200 parameter is set via remote communications, but the parameter

remains unchanged.

• Some parameters can only be changed when the Milltronics device is not

scanning. Try putting the Milltronics 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 the lock parameter and set it to 1954.

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Siemens HydroRanger 200 Instruction Manual Page 121