Function description
Operating Manual PSSu E S INC 24V se(-T)
1001380-EN-04
25
I/O data
name
I/O data type I/O data element
Meaning
InputData
ST_I_INC
CurrentData:
DWORD
Current counter status in incre-
mental encoder or counter operat-
ing mode
LatchOrPeriod:
DWORD
Counter status after a latch or zero
pulse or period length
ZeroPulse: BOOL
FALSE: No zero pulse at input C
TRUE: Zero pulse at input C
LatchOrMeasure-
Done: BOOL
FALSE: Period length or contents
of latch memory not transferred
TRUE: Period length or contents of
latch memory transferred
SetCounterDONE:
BOOL
FALSE: Default counter status not
transferred
TRUE: Default counter status trans-
ferred
Underflow: BOOL
FALSE: No counter underflow
TRUE: Counter underflow
Overflow: BOOL
FALSE: No counter overflow
TRUE: Counter overflow
State1: BOOL
FALSE: Status input, Bit 1 (mes-
sage from encoder)
TRUE: Status input, Bit 1
State2: BOOL
FALSE: Status input, Bit 2
(1)
TRUE: Status input, Bit 2
(1)
When configuring the module, users can determine the evaluation method for the status
input: single, redundant or diverse. Transmitting the status via two bits enables simple fault
detection: Two redundant bits must always be the same, two diverse bits must always be
different, otherwise the transmission is faulty.