Actual-To-Nominal Value Transfer - HEIDENHAIN iTNC 530 Technical Manual

Actual-to-nominal
value transfer
February 2002
During actual-to-nominal value transfer, the current position is saved as the
nominal position value. This becomes necessary, for example, if the axis has
been moved when the position control loop is open.
There are two ways to turn the actual position into the nominal position:
7
To transfer the actual position value in the MANUAL and ELECTRONIC
HANDWHEEL modes, set the corresponding bit in W1044.
7 To transfer the actual position in all operating modes, use Module 9145.
Warning
Ensure that actual-to-nominal value transfer does not occur continually,
since the position monitoring will not be able to detect any uncontrolled
machine movements. In this case no safe machine operation would be
possible.
W1044

Actual-to-nominal value transfer

Bits 0 to 8 correspond to axes 1 to 9
0: No actual-to-nominal value transfer
1: Actual-to-nominal value transfer
Module 9145 Actual-to-nominal value transfer
An actual-to-nominal value transfer for NC axes, or for PLC and NC axes
together, is possible only if the control is not active (M4176 = 0) or if there is
an M/S/T/T2/G strobe.
For a transfer only of PLC axes, the module can always be called.
For a transfer via M strobe, MP7440 bit 2 must not be set. For a transfer via
S/G strobe, MP3030 must not be set.
Call:
PS B/W/D/K <>axes bit-encoded>
CM 9145
Error detection:
Marker Value Meaning
M4203 0 Actual value was assumed as nominal value
1 Error code in W1022
W1022 2 Invalid axis number
21 Missing M/S/T/T2/G strobe in M4176 = 1
24 Module was called in a spawn job or submit job
The Control Loop
Set Reset
PLC PLC
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