Functionality - Siemens SINUMERIK Series Function Manual

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H1: Manual and handwheel travel

3.8 Approaching a fixed point in JOG

Functionality

Procedure in "Approaching fixed point in JOG"

● Selection of JOG mode

● Enabling the "Approach fixed point in JOG" function

● Traversing of the machine axis with traverse keys or handwheel

After selecting the "Approach fixed point in JOG" function, the PLC outputs the number of

the fixed point to be approached binary coded to the NC using the following bits:

DB31, ... DBX13.0-2 (JOG approach fixed point)

The NC confirms the activation with the interface signal as soon as the function is effective:

DB31, ... DBX75.0-2 (JOG approach fixed point active)

Activation is not possible:

• during an NCK reset

• In case of impending emergency stop

• During processing of an ASUP

No alarm message occurs. Delayed activation takes place after closure or after

acknowledgement of the active function.

The actual traversing is started with the traverse keys or the handwheel in the direction of

the approaching fixed point.

The selected machine axis traverses till it comes to an automatic standstill at the fixed point.

The corresponding NC/PLC interface signal is reported on reaching the fixed point with

"Exact stop fine":

DB31, ... DBX75.3-5 (JOG approach fixed point reached)

This display signal is also signaled if the axis reaches the fixed point position in the machine

coordinates system via other methods e.g. NC program, FC18 (for 840D sl) or synchronized

action on the setpoint side and comes to a standstill on the actual value side within the

"Exact stop fine" tolerance window (MD36010 $MA_STOP_LIMIT_FINE).

Function Manual, 03/2013, 6FC5397-1BP40-3BA1

Extended Functions

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