Rockwell Automation 1404-M4_M5_M6_M8 Powermonitor 3000 User Manual, Firmware rev. 3.0 or LATER - Manual (Page 163)

Publication 1404-UM001F-EN-P - November 2009 163
Advanced Features Chapter 8
The data client sets up the read-back configuration with a table write
to the
Oscillograph Configuration/Read-back Data Select table, the
content of which is described above. As with other indexed reads,
DeviceNet and Ethernet optional communication support only manual
increment read-back mode so that the client must write a read-back
select message before each read of the results table. For all other
communication options, auto-increment all channels or
auto-increment current channel read-back mode provides the highest
communication throughput.
Waveform Data Points
The results table contains 20 data points for optional DeviceNet
communication or 50 data points for all other communication options.
Data points are numbered 1…20 or 1…50 in each read. The client
calculates each data point’s place in the waveform by using the
following formula:
The total number of data points is 4600 for capture type 0, 1, and 2
and 9200 for capture types 3, 4, and 5.
N
datapoint_oscillogram
N
block
1 – ( ) N
datapoint_this_read
+ =
N
datapoint_oscillogram
= the sequence number of the data point in the oscillogram channel
N
block
= the block number
N
datapoint_this_read
= the data point number (1…20 or 1…50) in the current read