User manual

6 Detailed descriptions of I/O modules | Digital counter module UR20-1CNT-100-1DO
341Manual u-remote1432790000/08/12.2015
Endless counting
Upper
count limit
Lower
count limit
Load value
Gate start Gate stop
Time
Counting value
0
Overrun
Underrun
Continous counting
– Counting starts at the load value, the entire counting
range is used.
– If the upper count limit is reached during up-counting, an
additional counting pulse in the positive direction leads to
a jump to the lower count limit. Counting continues from
there.
– If the lower count limit is reached during down-counting,
an additional counting pulse in the negative direction
leads to a jump to the upper count limit. Counting conti-
nues from there.
– Upon exceeding the upper or lower counting limit, the
status bit “Overflow performed” or “Underflow perfor-
med” is set and a process alarm is triggered if it is para-
meterised. The status bits remain set until they are reset
with the bit “Reset status bits” in the control word.
1-time counting / no primary direction
Upper
count limit
Lower
count limit
Load value
Gate start Gate startAutomatic
gate stop
Automatic
gate stop
Counting value
0
Overrun
Underrun
Time
1-time counting, interrupted counting
Upper
count limit
Lower
count limit
Load value
Gate start Gate startAutomatic
gate stop
Automatic
gate stop
Counting value
0
Overrun
Underrun
Time
1-time counting, cancelled counting
– Counting (up and down) starts at the load value, the
entire counting range is used.
– Upon exceeding the upper or lower count limit, the coun-
ter jumps to the other count limit respectively. The inter-
nal gate is automatically closed, the status bit “Overflow
performed” or “Underflow performed” is set and apro-
cess alarm will be triggered if it is parameterised.
– To restart counting, the internal gate must be reopened.
Depending on the parameters set, counting continues
from the current counting value (“Interrupt counting”) or
it starts again from the load value (“Cancel counting”).