G Function (Action); Action (Do) - Siemens SINUMERIK 828D Function Manual

Detailed description
2.2 Components of synchronized actions
2.2.5

G function (action)

Defined initial state
With regard to the part program sequence, synchronized actions can be executed at any
time depending on fulfillment of the condition. Therefore, it is advisable to define the required
measuring system (inch or metric) in the action part in a synchronized action. This generates
a defined initial position for the execution of the action, irrespective of the current part
program state.
G functions
The following G functions are permitted:
●
●
●
●
Validity
A G function programmed in the condition part also applies for the action part even if no G
function has been programmed in the action part itself.
A G function programmed in the action part only applies within the action part.
2.2.6

Action (DO)

The action part of a synchronized action is initiated with the keyword
One or more actions can be programmed in the action part. These are executed when the
appropriate condition is fulfilled. If several actions are programmed in one synchronized
action, they are all executed in the same interpolation cycle.
Example:
If the actual value of the Y axis is greater than or equal to 35.7, the auxiliary function M135 is
output on the PLC and, at the same time, digital output 1 = 1 is set.
Program code
WHEN $AA_IM[Y] >= 35.7 DO M135 $A_OUT[1]=1
Technology cycle
A technology cycle can be called as an action. See Section "Technology cycles (Page 119)".
16
(Inch dimensions for geometric specifications (lengths))
G70
(Metric dimensions for geometric specifications (lengths))
G71
(Inch dimensions for geometric and technological specifications (lengths, feedrate))
G700
(Metric dimensions for geometric and technological specifications (lengths,
G710
feedrate))
.
DO
Function Manual, 07/2012, 6FC5397-5BP40-3BA0
Synchronized actions