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Appendix G—Troubleshooting
TROUBLESHOOTING COMMUNICATION ISSUES
When the baud rate on the ViewPoint Communications screen and the PowerScout do not match,
communication fails and a Communication Error message displays in the Status field:
“Unable to establish connection with meter, please check settings and try again.”
The following headings provide possible solutions for communication errors. You can connect via USB or
to get the RS485 back to a known state.
Baud Rate Communications Error
(RS-485 only)
To correct a baud rate communications error, use the following steps:
1) In ViewPoint, set the Modbus Base Address Switches field to 00.
2) On the PowerScout, set the address switches to 00
.
3) P
ower up the meter. With both settings at 00, ViewPoint and the PowerScout will communicate at a
9600 baud rate regardless of a baud rate mismatch. Communications is established.
4) Next, select the desired baud rate in ViewPoint from the Baud Rate drop-down list. This
synchronizes the baud rates between ViewPoint and the PowerScout
.
5) C
lick Connect in ViewPoint to reconfirm communications.
Port Error
If the PC COM Port drop-down list does not contain a RS-485 port, the RS-485 adapter driver is not
installed or the device is not connected to the computer’s USB port. Check that the adapter is connected
to a live USB port or move the USB cable to another USB port.
Firmware Update Fails
When the firmware update fails, select a slower baud rate and retry the update.
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