104 Rockwell Automation Publication 1426-UM001J-EN-P - August 2019
Chapter 5 Power Quality Monitoring
Status
The Status.Alarms Data Table, on page 348, provides the following tags for
monitoring of sags and swells. A sag or swell indication continues until 90
seconds has elapsed after all phase voltages return to the threshold, providing a
more reliable indication of sags and swells when these tags are logged at a
1-minute interval.
• Sag_Indication_Detected
• Swell_Indication_Detected
Sags and swells are also recorded in the alarm log with alarm type = 4 and
alarm code = 1 for sag, 2 for swell. In the M6 and M8 models, sags and swells,
their trip points, and references to their associated waveform records are also
recorded in the Power Quality log.
Related Functions
• Basic Metering setup
• Power Quality setup
•Waveform Recording
• Power Quality Log
Waveform Recording (M6
and M8 model)
The power monitor can capture and record waveforms of all current and voltage
channels.
Setup
Basic metering setup is required. These configuration parameters are found in the
Configuration.PowerQuality tab:
• Capture_Pre_Event_Cycles - pre-event cycles for waveform capture,
range = 5 (default)…10 cycles
• Capture_Post_Event_Cycles - post-event cycles for waveform capture,
range = 2…30 cycles, default 15
These configuration parameters are found in the
Configuration.Communications_Native tab, and specify the synchronized
waveform broadcast parameters:
• WSB_Mode - waveform synchronization broadcast mode. The options are
the following:
– 0 = Disable (default)
– 1 = Enable
• WSB_Port - specified UDP port for WSB feature,
range = 1001 (default)…1009
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