Instructions

Detailed descriptions of I/O modules | Digital counter module UR20-2CNT-100
159Manual u-remote1432790000/03/02.2014
Operating principle when counter value = comparison value
Counting value
Hysteresis = 0
Hysteresis = 3
1
2 3
4 7
5
6
Comparison
value
1 Counter value = comparison value ➝ comparison bit is set and hysteresis
activated
2 Leaving the hysteresis range ➝ comparison bit is reset and counter value <
comparison value
3 Counter value = comparison value ➝ comparison bit is set and hysteresis
activated
4 Comparison bit is reset because the hysteresis range is left and counter
value > comparison value
5 Counter value = comparison value ➝ output is set and hysteresis activated
6 Counter value = comparison value and hysteresis active ➝ comparison bit
remains set
7 Leaving the hysteresis range and counter value > comparison value ➝
comparison bit is reset
Hysteresis becomes active when the comparison condition
is reached. The comparison result remains unchanged dur-
ing active hysteresis until the counter value leaves the set
hysteresis range. After leaving the hysteresis range, hyster-
esis is reactivated only upon reaching the comparison condi-
tion again.
Diagnosticsandalarm
Overview
Trigger Processalarm Diagnosticalarm parametrizable
Overow
✓ -
✓
Underow
✓ -
✓
Comparision value
✓ -
✓
End value
✓ -
✓
Diagnostics buffer
overow
- ✓
-
Process alarm lost
- ✓
Process alarm data
In order to react to asynchronous events, there is the option
of activating process alarms. Linear program ow is inter-
rupted by the process alarm and it branches to a specic
interrupt routine depending on the master system. At this
place it is possible to respond appropriately to the process
alarm.
ProcessalarmdataUR20-2CNT-100
Byte Bit Funktion
B0
X0.0 - 0.1 reserved
X0.2 Counter 0 : Overow, underow or end value reached
X0.3 Counter 0: Comparison value reached
X0.4 - 0.5 reserved
X0.6 Counter 1 : Overow, underow or end value reached
X0.7 Counter 1: Comparison value reached
B1
X1.0 Status Counter 0: Input channel 0 A (trace A)
X1.1 Status Counter 0: Input channel 0 B (trace B)
X1.2 Status Counter 1: Input channel 0 A (trace A)
X1.3 Status Counter 1: Input channel 0 B (trace B)
X1.4 - 1.7 reserved
B2
16 Bit Zeitstempel 0 ... 65535µs, rotierend
B3
Diagnostic data
A diagnostic alarm for the module can be activated through
parametrizing.
Upon triggering of a diagnostic alarm, the diagnostic data
from the module is made available for diagnosis
incoming
. As
soon as the causes of the triggering of a diagnostic alarm
are no longer present, an automatic diagnostic alarm
outgoing
is
activated.
If a diagnostic alarm
incoming
is triggered for a channel due to
a process alarm going missing, all events up until the corre-
sponding diagnostic alarm
outgoing
are lost.
Within this period of time (1st diagnostic alarm
incoming
until
the last diagnostic alarm
outgoing
), the module's dome LED
lights up.