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1MRS750881-MUM
5.4.2.4.
Remote Monitoring and Control Unit
Technical Reference Manual
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 parameter
increases in the range 0... 2147483647. The pulse counters are updated with a period
of 500 ms.The frequency range of a digital input parametrized to operate as a pulse
counter is 0.....100 Hz.
Filtered
Input
Counter
Fig. 5.4.2.3.-1 Principle of pulse counter function
Counter settings
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
All the updated values of the Input # preset parameters are then copied to the
corresponding Input # counter parameters.
Writing the value 2 to the Counter trigger parameter copies all the Input #
preset parameter values to the corresponding Input # counter parameters.
Writing the value 0 clears all the counters.
Table 5.4.2.3-1 Counter setting parameters
Parameter
Input # preset
Input # mode
Counter trigger
Oscillation suppression
Oscillation suppression is used to reduce the load from the system when, for some
unrecognized reason, a digital input starts oscillating. A digital input is regarded as
oscillating if the number of valid status changes (= number of events after filtering)
during 1second is greater than the set value Input osc. level (Oscillation
level). During oscillation, the digital input is blocked (status is invalid) and an event
is generated. The state of the input does not change when it is blocked, that is, its
state depends on the condition before blocking.
Values
0..... 2147483647
1 = digital input
2 = counter
0 = clear all counters
1 = load updated
Input # preset
2 = load all
Input # preset
REC 523
Dipo_b
Default
0
1
values
values
37
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