Function block library
7-71
 SHB9300CRV EN 2.0
Input CDATA-DFIN: Generation of X position from a digital frequency
The digital frequency at CDATA-DFIN is integrated into the X position. With this control mode, the
controller must besynchronised to the master value, if necessary (for description of synchronization
of master drive and cam profiler see below).
With CDATA-XRESET = HIGH
l
the integrator is set to position X = 0 and remains there, (CDATA-XPOS = 0)
l
a HIGH signal is output at CDATA-X0
l
value adjusted at CDATA-XOFFS are not effective on the output side and are not processed
as X position.
l
the cycle is set to the first profile for automatic cam processing (C1311).
Synchronization of X position to the machine
The TP initiator enables that the cam drive can be continuously synchronized to the position of the
machine master phase. Slipping material or not integer cycle length can lead to a remaining phase
difference between master and cam drive. This difference is detected by TP. It is compensated by
an appropriate cam drive acceleration.
Note!
Design note:
The TP should be positioned such that accelerations do not occur in the event of synchronism. By
this accelerations (positive or negative) occuring during the compensation phase can be reduced
to a minimum (e.g. during standstill).
Select the TP position at the input CDATA-TP-POS. This input is connected to the code C1476/16
(factory setting).
Touch probe (TP) - correction of X position
The TP initiator (positive signal) must be applied to terminal X5/ input E5.
Stop!
The terminal might be assigned differently in the controller, see function block DIGIN.
The input CDATA-X-TP/E5 must be assigned to HIGH
Note!
The TP initiators can be subject to delay times when they respond. These delay times cause a
speed-dependent phase offset, which are mainly disturbing at high speed. Enter the correction
value for the phase offset in x.xxx[ms] under C0430/5.
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