Delta DPM-C530A - 8 Messages of Abnormal Operations

72
Messages of Abnormal Operations
Under abnormal communications, the power meter can send out messages via Modbus (codes shown
below), informing the reason why the main station experienced abnormal situation.
Abnormal Message Code Name Description
0x01 Illegal Function Illegal functional code
0x02 Illegal Data Address Address of data read or written is illegal
0x03 Illegal Data Value
Illegal data format
(such as incorrect data length)
0x04 Slave Device Failure Slave device fails to follow commands
Based on start/stop status for the 29 types of alarm settings (register location 0x3E~0xFF) under
abnormal situations, the power meter records the type and time of the alarm occurred in the register
location 0x0A01~0x0ACF. The types of alarms and their descriptions are as follows:
Alarm
Number
Alarm Type Description
1 Over-current Average current is higher than alert value
2 Low current Average current is lower than alert value
3 Over natural current Natural current is higher than alert value
4 Over line voltage Average line voltage is higher than alert value
5 Low line voltage Average line voltage is lower than alert value
6 Over phase voltage Average phase voltage is higher than alert value
7 Low phase voltage Average phase voltage is lower than alert value
8 Over-voltage imbalance Rate of voltage imbalance is higher than alert value
9 Over-current imbalance Rate of current imbalance is lower than alert value
10 Over active power Total active power is higher than alert value
11 Over reactive power Total reactive power is higher than alert value
12 Over apparent power Total apparent power is higher than alert value
13 Active power factor (leading) Power factor under leading load is lower than alert value
14 Active power factor (lagging) Power factor under lagging load is lower than alert value
15 Displacement power factor (leading)
Displacement power factor under leading load is lower
than alert value
16 Displacement power factor (lagging)
Displacement power factor under lagging load is lower
than alert value
17 Over current demand Current demand is higher than alert value