ABB REM 54 Series, Technical Reference Manual

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1MRS750915-MUM
Machine Terminal
Technical Reference Manual, General
REM 54_
5.1.7.3. Pulse counters
Some specific digital inputs (refer to section “Digital inputs” on page 47) of the
terminal can be programmed either as digital inputs or as pulse counters. This
programming is done via the parameter
Input # mode
(in this parameter as well
as in others mentioned below, # denotes the input number).
When an input operates as a digital input, no counting is done but the pulse counter
value remains at the present value.
When an input operates as a pulse counter, the positive input transitions (0 -> 1) of
a filtered input are counted and the counter value of
Input # counter
increases
in the range 0... 2147483647. The pulse counters are updated with a period of 500
ms. The frequency range of a digital input parameterized to operate as a pulse
counter is 0...100 Hz.
dipo2_b
Fig. 5.1.7.3.-1 Principle of pulse counter function
The parameter
Input # preset
can be used to give a counter the start value.The
start value is loaded into the counter by:
• writing the desired start value to the parameter
Input # preset
,
• writing the value 1 to the parameter
Counter trigger
. Then all the updated
values of the
Input # preset
parameters are copied to the corresponding
Input # counter
parameters.
Writing the value 2 to the
Counter trigger
parameter copies all the
Input # preset
values to the corresponding
Input # counter
parameters.
Writing the value 0 clears all the counters.
Parameter Values Default
Input # preset 0..... 2147483647 0
Input # mode 1 = digital input
2 = counter 1
Counter trigger 0 = clear all counters
1 = load updated Input # preset values
2 = load all Input # preset values
Filtered
Input
Counter