Functionality - Siemens SINUMERIK 840D sl Function Manual

H1: Manual travel and handwheel travel
4.10 Approaching a fixed point in JOG
4.10.2

Functionality

Procedure
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
Activation
The PLC sets the interface signal after the "Approach fixed point in JOG" function has been
selected:
DB31, ... DBX13.0-2 (JOG - Approach fixed point)
The number of the approaching fixed point is to output through Bit 0 - 2 binary code.
The NC confirms the activation with the interface signal as soon as the function is effective:
DB31, ... DBX75.0-2 (JOG - Approach fixed point)
Note
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.
Sequence
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)
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).
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Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions