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B R A NCH CI RCU IT MON ITOR I NG
I N S TA L L AT I O N A N D CO M M I SS I O N I N G I N S T R U C T I O N S
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ASPMETER split core
Troubleshooting
Problem
Solution
Product is not communicating
over Modbus daisy chain
• Check the unit Modbus address to ensure that each device on the daisy chain has a unique address.
• Check parity.
• Check the communications wiring.
• Check that the daisy chain is properly terminated.
RX LED is solid
• Check for reversed polarity on Modbus communications.
• Check for sufficient biasing on the Modbus bus. Modbus physical specification calls for 450–650 Ω biasing.
This is usually provided by the master.
The main board has a fast flashing
amber light
• Verify ribbon cable connectors are inserted in the correct orientation.
• If cables are correct, reset main board to re-initialize product.
The main board has a slow flashing
amber light
• One or more channels is clipping. This can be caused by a signal greater than 100 A or 277 V L-N, or by a signal
with high THD near the gain stage switching points (1.5 A and 10 A).
The main board has a flashing
green light
• Everything is wired properly, and the main board has power.
The main board has a flashing
or solid red light
• Light may be red briefly while device powers up.
• If light is red for more the 60 sec., device has encountered a diagnostic event. Contact technical support.
Split-core product is reading zero
for some values
• Device was unable to read split-core adapter boards on power up. Verify adapter boards are connected.
• Verify ribbon cable connectors are inserted in the correct orientation.
• Reset main board to re-initialize product.
Power factor reading is not
as expected
• Verify voltage taps are connected in appropriate phase rotation.
• Verify phase rotation of breakers (firmware rev. 1.012 or higher allows for custom rotation if needed).
Current reading is not as expected,
or reading is on different CT number
than expected
• Verify ribbon cable is fully seated and in the correct orientation.
Current is reading zero, even when
small currents are still flowing
through circuit
• The product cuts off at 50 mA and will set the reporting register to 0 mA for currents near or below this range.
Configuration tool “NetConfig”
returns Modbus error on read/write
• Verify use of the latest release of configuration tool “NetConfig” because older versions may not support
all features in current product firmware. Latest version is available on the website http://www.veris.com/
modbus_downloads.aspx
For troubleshooting or service-related questions, contact ABB at 800-782-8061 or at [email protected]