Publication 1404-UM001D-EN-E - October 2004
Advanced Features 8-21
• Voltage: three RMS voltage results that express line-to-line (delta
wiring modes) or line-to-neutral (all other wiring modes) for the
current Cycle number. Range 0.0 to 999.0 * 10
21
• Current: four RMS current results (L1, L2, L3, L4) for the current
Cycle number. Range 0.0 to 999.0 * 10
21
• Trigger channel: indicates which channel caused the transient
capture. 1=V1, 2=I1, 3=V2, 4=I2, 5=V3, 6=I3, 7=I4
• Index at trigger: the value of the transient index at the time of
the capture. Range -999.0 * 10
3
to 999.0 * 10
3
• Voltage and Current trigger thresholds: at the time of the
transient capture. Range 0.0 to 999.0 * 10
3
• Capture ID: unique identifier that increments by 1s to 30,000 and
then rolls over to 0
Read this data table using an indexed read method. Select the
Read-back Mode, Capture and Cycle by writing to Table A.43.
Reading Transient Capture Data
The data client sets up the read-back configuration with a table write
to Table A.45 Transient Capture Clear/Read-Back Data Select.
Transient capture data is not available via Modbus communications.
This read/write table of 13 integer elements contains the following
• Password: required for Clear command, use -1 for read-back
selections
• DeviceNet unique write identifier
• Capture number: selects one of 6 captures or returns the last
capture number selected. Range: 0 = most recent capture
initiated via communications, 1 through 6 = capture #1 through
#6, default 1.
• Channel number: selects a channel number or returns the last
channel number selected. Range: 1 = V1, 2 = I1, 3 = V2, 4 = I2, 5
= V3, 6 = I3, 7 = I4, default 1.
• Block number: selects a data block for the next read or returns
the last block selected. Range depends on communications type.
See below. Default 1.
• Read-back mode: selects a read-back mode or returns the last
mode selected. Range 0 to 2, default 0. See below.
• Clear command: clears one or all captures. Always returns 0.
See below
• Reserved elements: must be zero (0) on a write, returns 0.
Allen-Bradley HMIs
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