Parameterising 2/4xcounter module
Measuring the pulse width, fref programmable (mode 20)
12
Parameter setting
12.4
12.4.11
l
12.4-29
EDSPM-TXXX-3.0-04/2004
12.4.11 Measuring the pulse width, f
ref
programmable (mode 20)
1
2
3
4
5
6
7
8
9
10 GND
+24VDC
In1 (RES)
In2 (PULSE)
In3 (DIR)
Out0
In4 (RES)
In5 (PULSE)
In6 (DIR)
Out1
Counter 0
Counter 1
epm-t075
Fig. 12.4-37 Terminal assignment of the 2/4xcounter in the mode 20
The pulse widths of the signal at the input IN2 / IN5 (PULSE) are measured with a
programmabletimebase(f
ref
,seefigure“Counter access”).
The measuring process starts with a HIGH-LOW edge at input IN2 / IN5 (PULSE)
and ends with the LOW-HIGH edge.
A LOW-HIGH edge of the measured signal stores the pulse width with the unit
1/f
ref
. This result can be found and read out in the data output range until the next
result appears.
The counting direction is determined via the signal level at input IN3 / IN6 (DIR).
Upcounter: LOW level
Downcounter: HIGH level
During the counting process, a LOW level must be applied to input IN1 / IN4 (RES).
A HIGH level deletes the counter.
Output OUT0 / OUT1 has no function.
Terminal assignment
PULSE signal
DIR signal
RES signal
OUT signal
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