Lenze I/O system 1000 - Page 139

5 CANopen communication
5.10 Parameterising the counter
139
Lenze · I/O system 1000 · Reference Manual · DMS 5.0 EN · 09/2016 · TD17
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Further information:Product description
( 15)
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.
Process alarm The activation of a process alarm can be parameterised. A process alarm can be triggered in
the case of the following events:
•Open hardware gate
• Closed hardware gate
• Counter limit overflow
• Counter limit underflow
• Comparison value reached
• Final value reached
•Latch value reached
Diagnosealarm 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.
Diagnostic function Diagnostic functions are provided by the modules.
Diagnostic
information
The diagnostic information describes the diagnostic contents that can be read out of a
module. Diagnostic information is not automatically sent by the module but must be read
out actively via SDO access.