Lenze EVS93xx CrossCutter - Manual (Page 256)

Cross Cutter
Appendix
 Prepared Solution Servo PLC / ECSxA 1.1 EN 6-88
Outputs (Variable type: VAR_OUTPUT)
Name Data type Value/Meaning
bTpReceivedOut_b BOOL Display of a valid print-mark pulse (print-mark pulse inside the tolerance window): A FALSE-
TRUE edge indicates a valid print-mark signal.
Note: The associated last-scan value for a valid print mark corresponds to the value at input
dnActIncLastScan_p. This makes it possible to evaluate the print-mark signal on a touch-probe-
specific basis.
Indicates whether a tolerance window has been defined by an initial print-mark pulse at input
bTpReceivedIn_b:
FALSE The tolerance window has not yet been defined (the position of the tolerance
window will be defined by the first print-mark pulse detected at input
bTpReceivedIn_b).
bTpWindowActive_b BOOL
TRUE The position of the tolerance window is known – all subsequent print-mark pulses
are checked in respect of their position inside the tolerance window and output to
bTpReceivedOut_b if applicable.
Display bit for error pulses: bNoTpInWindowDetected_b BOOL
FALSE =>
TRUE
No print-mark pulses have been detected in the tolerance window. The
state of the output will not change until the tolerance window opens
again.
Display bit for the open tolerance window:
FALSE The tolerance window is closed: A print-mark pulse at input bTpReceivedIn_b will
be blocked and not output to output bTpReceivedOut_b.
bTpWindowOpen_b BOOL
TRUE The tolerance window is open: A print-mark pulse at input bTpReceivedIn_b will
be output to output bTpReceivedOut_b.
Note: The output will be TRUE for at least one cycle, even if the tolerance
window opens and closes again within a task cycle.
dnTpDistance_p DINT Distance between two valid print-mark pulses in [incr.]:
This output can be used for control and monitoring, e.g. in order to:
• Identify inaccuracies or diffusions affecting the application of print marks.
• Set the print-mark distance as a reference value for the setpoint distance (input signal
dnCycleLength_p).
Status of the Tp_Window function block:
2 The first print mark is expected at input bTpReceivedIn_b to define the position of
the tolerance window.
0 Normal operation: Incoming print-mark pulses at input bTpReceivedIn_b are
checked in respect of their position inside the tolerance window and output to
output bTpReceivedOut_b if applicable.
-2 The width of the tolerance window (input dnTpWindowSize_p) is outside the
permitted range 2 … (dnCycleLength_p – 1).
nStatus INT
-4 The function block is reset by input bReset_b = TRUE.
Internal (Variable type: VAR)
Name Data type Meaning
dnTpPosition_p DINT Position of the tolerance window: The variable indicates the centre of the tolerance window in
the cycle. The value is calculated by dividing dnCycleLength_p by 2.
dnLowerWindowLimit_p
dnUpperWindowLimit_p
DINT Upper/lower limit of the tolerance window: The variables are calculated as follows:
dnLowerWindowLimit_p =
dnTpPosition_p - dnTpWindowSize_p/2
dnUpperWindowLimit_p = dnTpPosition_p + dnTpWindowSize_p/2.
dnOut_p DINT Control variable: This position value is derived by integrating the speed input nIn_v and runs in
the value range 0 … (dnCycleLength_p – 1), thereby mapping a cycle (setpoint distance
between two valid print marks). It combines with the dnLowerWindowLimit_p and
dnUpperWindowLimit_p variables to generate the bTpWindowOpen_b output variable.