Waiting for event (#WAIT FOR)
Syntax: |
#WAIT FOR <wait_condition> |
This command stops the decoding of the NC program until the arithmetical expression is fulfilled (TRUE or >0.5).
Programing Example
Waiting for an event
N10 #WAIT FOR V.E.EXT1 == 5 | (Decoding of NC program is stopped at this) (point until the value of the external variable) (is 5.) |
.... | |
N100 #WAIT FOR V.E.EXT2 | (Decoding of the NC program is stopped at this (Point until the value of the (external variable > is 0.5.) |
.... |
Attention
The controller look-ahead mechanisms may result is the state that a certain number of motion-relevant NC blocks programmed before #WAIT FOR are retained in the NC channel. If the retained motion blocks are relevant for generating the event itself, a deadlock is caused and execution of the NC program is stopped without any apparent reason.
By programming #FLUSH or #FLUSH CONTINUE directly before #WAIT FOR, the execution of all preceding motion blocks is forced and a deadlock is avoided.
Programing Example
Waiting for an event
.... | |
Nxx G01 X.. Y.. Z.. F.. | |
Nxx G01 X.. Y.. Z.. F.. | |
Nxx G01 X.. Y.. Z.. F.. | |
Nxx G01 X.. Y.. Z.. F.. | |
Nxx G01 X.. Y.. Z.. F.. | |
Nxx G01 X.. Y.. Z.. F.. | |
Nxx G01 X.. Y.. Z.. F.. | |
Nxx #FLUSH CONTINUE | ;Forced execution of all buffered motion blocks |
Nxx #WAIT FOR V.E.XX>123 | ;Forced execution of all buffered motion blocks |
.... | |