Program-Dependent External Read-In Enable (G99) - Siemens WF 723 C Programming Manual

Programming of Traversing Blocks
4.11.9

Program-dependent external read-in enable (G99)

With the "Program-dependent external read-in enable" function, a stop and subsequent
continuation of program execution can be realized through a rapid input. The rapid input must
be programmed with the "Program-dependent external read-in enable" function.
The rapid input for the "Program-dependent external read-in enable"
function must be programmed in the master axis.
The parameterization of the rapid inputs is described in the Description of
Functions, chapter "Rapid inputs/outputs".
Programming:
N10 G90 G77 X100.000 FX4000.00
N15 G99 X200.000
N20 X300.000
N10 N15
Fx
E
Flying block change from N10 to N15.
In the braking point of N15, the axis starts braking, as G99 inquired the rapid input,
which at that time has not yet been selected.
The rapid input is selected. Program execution changes into block N20, and the axis
accelerates again.
If the rapid input has been selected already in the braking point of N15, a flying block
change will take place.
If the rapid input has not been selected, the axis will be braked to standstill and
remain in position X200.000, indicating PEH. The selection of the rapid input causes
program execution to continue.
4 – 38
N20
©
Siemens AG 1997 All Rights Reserved
04.97
t
t
6ZB5 440-0VU02
WF 723 C (Programming Guide)