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6
PROFIBUS communication
6.7
Parameterising the counter
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Lenze · I/O system 1000 · Reference Manual · DMS 5.0 EN · 09/2016 · TD17
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6.7
Parameterising the counter
6.7.1
1 counter 32 bits, 24 V DC - EPM-S600
By integration of the GSE file VI010C19.gse you can specify all counter parameters via a hardware
configuration.
The following functions can be parameterised:
Counting functions
Description
Continuous counting
The counter counts from the loading value to the counting limit, then skips to the
opposite counting limit and continues to count from there.
Counting once
The counter counts once/periodically from the loading value in the specified
counting range.
Counting periodically
Signal evaluation
Description
Single rotary transducer
Connection to "A/pulse" input
Double rotary transducer
Quadruple rotary transducer Connection to input "A/pulse" and "B/direction"
Direction
Pulse at "A/pulse" input and direction at "B/direction" input
Additional functions
Description
Main counting direction
The main counting direction can be parameterised:
None:
The entire counting range is available.
Forwards:
Limitation of the counting range upwards. The counter counts from the
parameterised loading value in the positive direction to the parameterised final
value -1 and then skips to the loading value again with the encoder pulse that is
following.
Backwards:
Limitation of the counting range downwards. The counter counts from
the parameterised loading value in the negative direction to the parameterised final
value +1 and then skips to the loading value again with the encoder pulse that is
following.
Gate function
The gate function serves to start, stop, and interrupt a counting function. In the case
of this counter a differentiation between the internal gate (I-gate), hardware gate
(HW gate), and software gate (SW gate) is made.
• The I-gate is the AND logic operation of the software gate (SW gate) and the
hardware gate (HW gate).
• The SW gate is controlled via your user program (status word in the output area).
• The HW gate is controlled via the digital gate input.
The following response can be parameterised:
Cancelling gate function:
After closing the gate and opening it again, the counting
process continues from the loading value again.
Interrupting gate function:
After closing the gate and opening it again, the counting
process continues with the last current counter content.
Latch function
If a positive edge occurs at the latch input, the current count value is stored in the
latch register. The latch register is accessed via the input area. After a STOP-RUN
transition, latch is always 0.
Comparator
You can specify a comparison value which, depending on the count value, activates
the digital output or triggers a process alarm.
Hysteresis
By specification of a hysteresis you can for instance prevent the output from being
permanently switched if the value of an encoder signal fluctuates around the
comparison value.