Lenze I/O system 1000 System Manual - Manual (Page 160)

Product description
I/O compound modules − counter
One counter 32 bits, 24 V DC − EPM−S600
3
l
160 EDSIO1000 EN 7.0
Parameterisable functions
Counting functions Description
Counting
continuously 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 input "A/pulse" and "B/direction"
Double rotary
transducer
Quadruple rotary
transducer
Direction Pulse at input "A/pulse" and direction at "B/direction"
Additional functions Description
Main counting
direction The main counting direction can be parameterised:
None: The whole 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.
l The I−gate is the AND logic operation of the software gate (SW gate) and the hardware
gate (HW gate).
l The SW gate is controlled via your user program (status word in the output area).
l 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.
Process alarm The activation of a process alarm can be parameterised. A process alarm can be triggered
in the case of the following events:
l Hardware gate open
l Hardware gate closed
l Counting limit − overflow
l Counting limit − underflow
l Comparison value reached
l Final value reached
l Latch value reached
Diagnostic alarm If the diagnostic alarm is enabled in the parameter setting, it occurs if another process
alarm is triggered for the same event during a process alarm processing
.