HBM MX440B - Page 183

Functions and outputs
Quantum
X
I3031-14.0 HBM: public 183
The maximum data rate of the input and output quantities
is 1200 Hz (< 1 ms of computation time). The computed
output signals can be scaled and output as filtered ana
log voltages by the same module. The computed signals
can also be distributed (isochronously) to the IEEE1394b
FireWire bus in real time and output via CAN bus or
EthrCAT® (MX471B: CAN bus. MX878B: EtherCAT®
bus).
Scaling of the input and output quantities must always be
noted.
An EXCEL compensation matrix can be copied directly to
the matrix parameterization (Ctrl + C, Ctrl + V).
Function for Root Mean Square (RMS) calculation
RMS is computed from one of the module’s 4 analog
input channels according to the formula:
RMS +
1
T
*
ŕ
T
0
f(x)
2
dx
Ǹ
Where f(x) denotes the input channel signal and T the
time window (in ms).
Keep in mind the following notes when working with RMS
channels:
S The maximum sampling rate is 4800 (2400) Hz
S The output (sampling) rate of the RMS channel must
not be higher than the sampling rate of the input chan
nel.
S Filters set for the MX878B/879B do not apply to RMS
channels. These channels are always unfiltered. How
ever, the input signal is filtered.