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K1: Mode group, channel, program operation, reset response

9.14 System settings for power-up, RESET/part-program end

Basic Functions

Function Manual, 09/2011, 6FC5397-0BP40-2BA0

633

9.14.1 Tool withdrawal after POWER OFF with orientation transformation

Function

If processing with tool orientation is interrupted (e.g. as a result of power failure), the transformation which was

previously active can be reselected after POWER ON to generate a frame towards the tool axis. The tool can

then be retracted in JOG mode by means of a retraction movement towards the tool axis.

Precondition

This procedures requires valid axis positions after POWER ON which are either delivered by absolute encoders

or by the function "Position restoration with POWER ON [Page 1220]".

Parameter assignment

Last active transformation should be kept after POWER ON

This functionality is activated using the MD setting:

MD20144 $MC_TRAFO_MODE_MASK, Bit1=1

In addition, the following bits must be set:

MD20110 $MC_RESET_MODE_MASK, bit0=1 and bit7=1

For the significance of MD20144 and 20110, see "System settings for power-up, RESET/part-program end and

part-program start [Page 628]".

NC language command WAITENC

For axes, which should be taken into account with WAITENC (see section "Programming") the following axis-

specific machine data must be set to "1":

MD34800 $MA_WAIT_ENC_VALID = 1

Programming

In the user program (…/_N_CMA_DIR/_N_PROG_EVENT_SPF) to be called event-controlled when powering up

(precondition: MD20108 bit3=1), the system must wait using the NC language command WAITENC until the

valid axis positions are available.

A frame that positions the tool axis in the direction of the X, Y or Z axis can then be generated using the NC

language commandTOROTX/TOROTY/TOROTZ.

Siemens SINUMERIK 828D Function Manual

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