Troubleshooting; Generally; Specifically - Siemens Milltronics BW500 Operating Lnstructions

Troubleshooting

Generally

1. First check to see that:
• There is power at the unit
• The LCD is showing something
• The device can be programmed using the fixed keypad.
2. Then, check the wiring pin outs and verify that the connection is correct.
3. Next, go over the setup parameter P770 to P779 and verify that these values match
the settings in the computer that you are using to communicate with it.
4. Finally, if you should check that the port you are using on the computer. 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. We have
found that this driver has been very useful to test communications.

Specifically

Q1: I tried to set a Siemens Milltronics device parameter, but the parameter remains
unchanged.
A1: a.
b.
Page 148 Milltronics BW500 and BW500/L - OPERATING INSTRUCTIONS 7ML19985DK05
Try setting the parameter from the keypad. If it can't be set using the
keypad, check the lock parameter (P000) and
Check to ensure that the SW1 (certification switch) is not in the
certification position.