User manual

6 Detailed descriptions of I/O modules | Digital counter module UR20-1CNT-500
371Manual u-remote1432790000/08/12.2015
1-time counting / primary direction down
Upper
count limit
Load value
End value
Gate start Gate startAutomatic
gate stop
Automatic
gate stop
Counting value
0
Time
1-time counting, primary direction down.
– Down-counting starts at the load value.
– If the parameterised end value +1 is reached during
counting in the negative direction, the counter jumps
back to the load value at the next count pulse. The inter-
nal gate is automatically closed, the status bit "End value
reached" is set and a process alarm will be triggered if it
is parameterised.
– To restart counting, the internal gate must be reopened.
Counting starts again at the load value.
– Upon reaching the upper count limit the counter jumps to
the lower count limit to continue counting from there.
The status bit "Overflow performed" is set and a process
alarm will be triggered if it is parameterised. All status
bits remain set until they are reset with the bit "Reset sta-
tus bits" in the control word
Counting range
Limits Valid range of values
End value –2 147 483 648 (–2
31
) to [phone] (2
31
–2)
Upper count limit [phone] (2
31
–1)
Periodic counting / no primary direction
Upper
count limit
Lower
count limit
Load value
Zero
crossing
Overrun
Underrun
Gate start Gate stop
Counting value
0
Time
Periodic counting, no primary direction
– Counting (up or down) starts at the load value, the entire
counting range is used.
– Upon reaching a count limit, the counter jumps back to
the load value and starts counting again from there. The
status bit "Overflow performed" or "Underflow performed"
is set and a process alarm will be triggered if it is parame-
terised. All status bits remain set until they are reset with
the bit "Reset status bits" in the control word.
Periodic counting / primary direction up
Upper
count limit
Lower
count limit
Load value
Overrun
Underrun
Gate start Gate stop
Counting value
0
Time
Periodic counting, primary direction up.
– Up-counting starts at the load value.
– If the parameterised end value -1 is reached during count-
ing in the positive direction, the counter jumps back to
the load value at the next positive count pulse and contin-
ues counting from there. The status bit "End value rea-
ched" is set and a process alarm will be triggered if it is
parameterised.
– Upon reaching the lower count limit the counter jumps to
the upper count limit to continue counting from there.
The status bit "Underflow performed" is set and a process
alarm will be triggered if it is parameterised. All status
bits remain set until they are reset with the bit "Reset sta-
tus bits" in the control word.