ES441.1 - User’s Guide 49
ETAS Functional Description
5.7.5 “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 qualifying
channel is evaluated and measurement controlled at the assigned measurement
channel.
In this mode, the ES441.1 can count edges with the following additional mea-
surement modes:
Up-/down-counter with control of the count direction in acc. with
• the edges of the qualifying signal (counter mode “X1”),
• the edges of the qualifying signal (counter mode “X2”), and
• the edges of the qualifying signal with analysis of the qualifying signal
(counter mode “X4”).
When to use the counter modes “X1”, “X2” and “X4”
• Coding/encoding digital signals
• Use in digital control circuits with movement control and digital data input
systems
• Quadrature functions
• Linear or rotary incremental quadrature encoder
• Digital potentiometers
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