Number Of Channels - Allen-Bradley Rockwell Automation 857 User Manual

Number of Channels

At the maximum, there can be 12 recordings, and the maximum
selection of channels in one recording is also 12 (limited in
waveform recording). The digital inputs reserve one channel
(includes all the inputs). Also the digital outputs reserve one channel
(includes all the outputs). If digital inputs and outputs are recorded,
there will be still 10 channels left for analogue waveforms.
Table 4.3 – Disturbance Recorder Parameters
Parameter Value
Mode
Saturated
Overflow
SR
32/cycle
16/cycle
8/cycle
1/10ms
1/20ms
1/200ms
1/1s
1/5s
1/10s
1/15s
1/30s
1/1min
Time
PreTrig
MaxLen
Status
–
Run
Trig
FULL
ManTrig
–
Trig
ReadyRec n/m
Set = An editable parameter (password needed)
This is the fundamental frequency rms value of one cycle updated every 10 ms.
This is the fundamental frequency rms value of one cycle updated every 20 ms.
Supporting Functions
Unit Description
Behaviour in memory full situation:
No more recordings are accepted
The oldest recorder will be
overwritten
Sample rate
Waveform
Waveform
Waveform
One cycle value
One cycle value
Average
Average
Average
Average
Average
Average
Average
s Recording length
% Amount of recording data before
the trig moment
s Maximum time setting.
This value depends on sample
rate, number and type of the
selected channels and the
configured recording length.
Status of recording
Not active
Waiting a triggering
Recording
Memory is full in saturated mode
Manual triggering
n = Available recordings
m = maximum number of
recordings
The value of 'm' depends on
sample rate, number and type of
the selected channels and the
configured recording length.
857-UM001A-EN-P – July 2009
4-3
Note
Set
Set
Set
Set
Set