VIPA 238-2BC00 - Digital Part - Counter - Additional Functions

Manual VIPA System 200V Chapter 5 238-2BC00 - Combination module
HB97E - SM-AIO - Rev. 12/32 5-31
Digital part - Counter - Additional functions
The additional functions listed in the following can be set for every counter
via the parameterization:
• Gate function
The gate function serves the start, stop and interruption of a counter
function
• Latch function
As soon as a positive edge is registered at the latch input, a recent
counter value is stored in the latch register.
• Comparison
You may set a comparison value that activates a digital output res.
throws a process alarm depending on the recent counter value.
• Hysteresis
By setting a hysteresis you may prevent a continuous toggling of an
output if the value of an encoder signal fluctuates around a comparison
value.
• Alarm
For the following events you may parameterize an alarm:
- status change of the HW gate
- Over- res. underrun
- Reaching a comparison value
- Loss of a counter pulse
The illustration shows how the additional functions influence the counter
behavior. The following pages give you a more detailed explanation of the
additional functions:
HW-Gate
Internal Gate
SW-Gate
Impulse evaluation
Impulse/Spur A Direction/Spur B
Compare value Counter value Latch
Latch
Load value
Compare
Hysteresis
Output
Process
alarm
R
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l
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a
s
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Overview
Schematic structure
Gate function