Actions (Do) - Siemens Sinumerik 840D sl Programming Manual

Possible conditions
• Comparison of main run variables (analog/digital inputs/outputs, etc.)
• Boolean gating of comparison results
• Computation of real-time expressions
• Time/distance from beginning of block
• Distance from block end
• Measured values, measurement results
• Servo values
• Velocities, axis status
10.1.3

Actions (DO)

Function
In synchronized actions, you can program one or more actions. All actions programmed in a
block are active in the same interpolation cycle.
Syntax
DO <action1> <action2> ...
Significance
DO
<action>
The G codes can be programmed in synchronized actions for the actions/technology cycles.
The G code may specify a different G code from the condition for all actions in the block and
technology cycles. If technology cycles are contained in the action part, the G code remains
modally active for all actions until the next G code, even after the technology cycle has been
completed.
Only one G code of the G code group (G70, G71, G700, G710) may be programmed per
action section.
Example: Synchronized action with two actions
Program code
WHEN $AA_IM[Y]>=35.7 DO M135 $AC_PARAM=50
Job planning
Programming Manual, 02/2011, 6FC5398-2BP40-1BA0
Initiates an action or a technology cycle when the condition is satisfied.
Action started if the condition is fulfilled, e.g., assign variable, activate
axis coupling, set NCK outputs, output M, S and H functions, specify the
programmed G code, ...
Comments
; If the condition is fulfilled, M135 is output
Motion synchronous actions
at the PLC and the overide is set to 50%.
10.1 Basics
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