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Chapter 5 Message of Abnormal Operations
5.1 Common malfunction analysis
5.1.1 Power meter dosen't work after it's electrified
5.1.2 Voltage or current reading in incorrect
5.1.3 Power or power factor reading is incorrect,
but voltage and current are correct
5.1.4 RS-485 communication is unusual
• Make sure voltage and other wiring is correct, voltage should be in the future functional
range.
• Turn off meter and restart.
• Check the wiring mode settings match the actual wiring mode.
• Check the voltage potential transformer (PT) and current transformer (CT) variable ratio
are set correctly.
• Check the GND is correctly grounded.
• Check the voltage potential transformer (PT) and current transformer (CT) are intact.
• Compare the voltage and current input of the inter-wiring and wiring diagram to check
whether the phase relationship is correct.
• Check the communication baud rate, ID and communication protocol setings of the upper
machine are consistent with the meter.
• Please check whether the data bit, stop bit, check bit settings are consistent with the host
computer.
• Check if RS-485 converter is working.
• Check whether there is any problem with the entire communication line (short circuit,
open circuit, grounding, whether the shield wire is correctly grounded at single-end, etc.).
• Turn off the meter and host computer, and then restart.
• For long communication lines, it is recommended that a matching resistance of about 120
ohms be connected in parallel at the end of the communication line.
Содержание AEM-DRB
Страница 11: ...7 Setting UI interface tree ...
Страница 12: ...8 2 4 Physical Dimensions Rear view Unit mm ...