MesCom
– Workshop Manual – D6000/i14/V10
© Dycon Ltd 2014
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43
7.4.4 Timer
On
Off
Hysteresis
Bottom
Threshold
Input
V
a
lue
0v
3.0v
Off
On
Off
On
Off
On
Off
On
Off
D
ec
re
as
ed
to
Ov
er
flow
Low
Threshold
C
ounte
r V
a
lu
e
0
65535
Inc
re
as
e to T
hr
es
hol
d
Can be used to time how long an input is in the specified state. This input uses the digital
input method to determine the input state whenever the input is sampled, and it is in the
specified state, the sample counter is increased. The Input value increases by 1 for each
accumulated second the input is in the specified state.
The timer input requires two thresholds but due to the universal nature of the MesCom point
system all 4 thresholds need to be configured. The first threshold is used for digital input
filter the second is the timer threshold. Two labels are used the first for Overflow events and
second for Threshold events.
9876 POINT Input3 TYPE 2
9876 POINT Input3 COUNT on
9876 POINT Input3 THRES 0.5 #65531 3.0 3.0
9876 POINT Input3 LEVELS Overflow Threshold na na na
9876 POINT Input3 DEBOUNCE 20
Where the first value is the digital input threshold and the second value is the timer
threshold, # signifies a raw count value and not a scaled voltage value.
Should an increment cause the value to reach the threshold value, then a fault alarm can be
created. Additional when the counter reaches the overflow value a restore alarm can be
created. See diagram, black dot overflow (restore), white dot moving threshold (fault).
9876 POINT Input3 ALARM both
Hysteresis can be applied the same as digital inputs:
9876 POINT Input2 HYST 0.1
