Rockwell Automation EK-44750C Enwatch Unit - Manual (Page 17)

Rockwell Automation Publication GMSI10-IN001A-EN-P - May 2013
Enwatch Unit 17
Enwatch Measurement
Capabilities This section lists the measurement capabilities of the Enwatch unit.
Table 2 - Enwatch measurement capabilities
Product Feature Capability
Signal Control Raw input signal
Integrated input signal via HP filter
Hp filter input signal
gSE 200 Hz input signal
gSE 5000 Hz input signal
Bias Voltage
Combining measurements in the Enwatch driver The Enwatch driver can combine measurements at the same location in the Emonitor software. The following items must to
be the same to combine measurements.
Signal route control (Integrate/non integrate/gSE/Raw)
Tachometer on/off
gSE time constant
Sample rate/maximum frequency
Phase lock loop
Number of averages
Measurement filter
Number of lines
How does the Enwatch driver choose the high-pass
filter? X=2 x FMAX/lines
If X > 5.3 then set to 23.8
else if X > 2.67 set to 5.3
else if X > 0.36 set to 2.67
else if the Smart HP filter is on in the Emonitor software, then set to 2.67, otherwise set to 0.36
Note: The Smart HP filter in the Emonitor software does not use 0.36Hz HP filter.
Trigger usage Sample on trigger (the first version of Enwatch always uses this option)
Sample on post-trigger
Sample on pre-trigger
Tachometer usage Use tachometer for PLL (phase loop locked)
Autorange Always on, maximum input ±10 V
Integrator reset control Reset before first sampling of a measurement
Sampling rate 64 to 51200 Hz by 1
Number of synchronous time averages 1, 2, 4, 8, 32... 32768
FMAX Sampling Rate FMAX Sampling Rate
25 64 2000 5120
50 128 3200 8192
100 256 4000 10240
200 512 5000 12800
400 1024 6400 16384
500 1280 8000 20480
800 2048 10000 25600
1000 2560 16000 40960
1600 4096 20000 51200