West Control Solutions CI 45 - Manual (Page 25)

Displays
With configuration for O
2
measurement (see above), the oxygen content is displayed as process value with the selected
unit (see above) on line 1. Max. 4 characters can be displayed.
With display range overflow, “
EEEE” is displayed .
Example: the ppm range is selected, but the value is a % value.
When exceeding the display span start, 0 is displayed.
+
Tip: the unit can be displayed on line 2.
6.8 Counter (optional)
Digital input di1 can be configured as a counter input (dependent on ordering code).
The function operating as a pulse counter is set as
• Up counter ( ConF / Cn.Fr / I.Fnc = 1, 2 )
• Down counter ( ConF / Cn.Fr / I.Fnc = 3, 4 )
• Active edge is configurable
g
The counter state is updated continuously in the background with the sample & hold function activated
(
r p. ) .
a
The counter state is not stored permanently. It is reset to the counter start value (Cnt.S) after supply
voltage switch-on.
Up counter function
• The counter starts with start value Cnt.S,
adjustable via
ConF / Cn.Fr / Cnt.S.
• With every edge at input di1, the counter is incremented by 1.
• A counter end value can be defined via ConF / Cn.Fr / Cnt.E.
Pulses in excess are not counted.
With the counter end value switched off, incrementing is done up to
the max. coun ter value.
g
Please, note that the counter end value must be higher than the
counter start value (Cnt.E > Cnt.S).
Down counter
• The counter starts at counter start value Cnt.S,
adjustable via
ConF / Cn.Fr / Cnt.S.
• The counter is decremented by 1 with every edge at input di1.
• The counter end value can be defined via ConF / Cn.Fr /
Cnt.E.
Pulses in excess are not counted.
With the counter end value switched off, decrementing is done down
to 0.
Functions
UNIFLEX CI 45 Counter (optional) 25
Cnt.S
Cnt.E
cnt
Cnt.E = off
Cnt.S
Cnt.E
cnt
Cnt.E = off
20.95
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