Capture type properties, Ee the capture type properties – Rockwell Automation 1404-M4_M5_M6_M8 Powermonitor 3000 User Manual, Firmware rev. 3.0 or LATER User Manual

Page 161

Publication 1404-UM001F-EN-P - November 2009

161

Advanced Features Chapter 8

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Capture clear status: Read-only bitfield that indicates which
capture numbers are clear. Bit 0 (LSB) corresponds to capture 1,
bit 1 to capture 2 and so on. For each bit, 1 indicates clear, 0
indicates not clear.

•

Capture ready status: read-only bitfield that indicates which
capture numbers contain captures that are ready to read. Same
bit correspondence as above. For each bit, 1 indicates the
capture is ready, 0 indicates no capture or not yet ready. If a
client reads a capture that is not ready, -1 is returned for all data
points.

Block Number

The block number and the total number of data reads required to read
an entire capture depend on the communication option and the
capture type.

See the

Capture Type Properties

table.

The block number range is 1 to the number of Data reads required
listed in the table.

Capture Type

The properties associated with the capture type options are listed in
the

Capture Type Properties

table.

You may select a capture type that best suits your application
requirements. A higher sample rate provides a more accurate
representation of the waveform when higher-order harmonics and
transients are present. Higher data resolution provides more accuracy
of each data point. Capture type 5 combines low sampling rate and
low resolution, but captures almost 7 seconds of waveform at 60 Hz.

Capture Type Properties

Capture
Type

Sampling
Rate

Data
Resolution

Samples per
Cycle at 60 / 50
Hz

Total Cycles per
Channel at 60 / 50
Hz

Capture
Duration
(seconds)

Data Reads Required

DeviceNet

Other Comms

5.4 kHz

13-bit
w/sign

90 / 108

51.1 / 42.6

0.85

230

2.7 kHz

45 / 54

102.2 / 85.2

1.70

1.35 kHz

22.5 / 27

204.4 / 170.3

3.40