Subaru impreza 2017 - Republic of South Africa Models

BLOCK
CountType
INPUT
RESET
ERROR
OVERFLOW
LIMIT1 … 4
CounterLimit1...4
MaxValue
OnMaxValue
InitialValue
VALUE
Operation
Counter
Overflow
Detection
Limit
Check
Error
Detection
IEC12000625_1_en.vsd
IEC12000625 V1 EN-US
Figure 230: Logic diagram
The counter can be initialized to count from a settable non-zero value after reset of
the function. The function has also a maximum counted value check. The three
possibilities after reaching the maximum counted value are:
• Stops counting and activates a steady overflow indication for the next count
• Rolls over to zero and activates a steady overflow indication for the next count
• Rolls over to zero and activates a pulsed overflow indication for the next count
The pulsed overflow output lasts up to the first count after rolling over to zero, as
illustrated in figure
231.
IEC12000626_1_en.vsd
Max value +3
®
Max value -1
®
Max value
®
Max value +1
®
Max value +2
®
Max value -1
®
Max value
®
0
®
1 2
...
...
...
...
Overflow indication
Actual value
Counted value
IEC12000626 V1 EN-US
Figure 231: Overflow indication when OnMaxValue is set to rollover pulsed
The Error output is activated as an indicator of setting the counter limits and/or
initial value setting(s) greater than the maximum value. The counter stops counting
the input and all the outputs except the error output remains at zero state. The error
condition remains until the correct settings for counter limits and/or initial value
setting(s) are applied.
Section 11 1MRK 505 384-UEN A
Monitoring
484 Breaker protection REQ650 2.2 IEC
Technical manual