ES441.1 - User’s Guide 41
ETAS Functional Description
5.7 Counter
5.7.1 Measurement Modes
In the calibration software, parameters and measurement modes can be selected
for event counting for every measurement channel:
• Counter modes with freely configurable parameters
– Type of event to be counted (edges or cycles)
– Evaluation of the signal at the measurement channel regardless of sig-
nals at other measurement channels or
– Evaluation of the signal at the measurement channel depending on
any other measurement channel of the module which is assigned to
the measurement channel as a qualifying channel (trigger channel)
• Counter modes with parameters which can be configured with restrictions
These measurement modes of the ES441.1 in its function as a counter can be
divided into four groups:
“Standard without Qualifying Signal” Counter Mode
The signal at the measurement channel is counted regardless of signals at other
measurement channels (see section 5.7.2 on page 42). All counter parameters
can be configured freely in the calibration software.
“Standard with Qualifying Signal” Counter Mode
Every measurement channel can be assigned any other measurement channel of
the module as a qualifying channel (trigger channel) in the counter mode “Stan-
dard with qualifying signal”. Depending on the configuration in the calibration
software, the input signal of the qualifying channel is evaluated and measure-
ment controlled at the assigned measurement channel (see section 5.7.3
on page 44). All counter parameters can be configured freely in the calibration
software.
“Up/Down” Counter Mode
The counter of every measurement channel can be assigned the input signals of
any other measurement channel of the module in “Up/Down” counter mode in
addition to the input signals of its own measurement channel. The signal edges
of these two measurement channels are analyzed and the counter state incre-
mented or decremented (see section 5.7.4 on page 48). Some counter parame-
ters can be configured freely in the calibration software.
“X1”, “X2” and “X4” Counter Modes
Every measurement channel can be assigned any other measurement channel of
the module as a qualifying channel (trigger channel) in the counter modes “X1”,
“X2” and “X4”. Some counter parameters are set by default when using the
counter modes “X1”, “X2” and “X4” and cannot be changed in the calibration
software. Depending on the selected counter mode, the input signal of the qual-
ifying channel is evaluated and measurement controlled at the assigned mea-
surement channel (see section 5.7.5 on page 49).
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