Speed limit look ahead (speed_limit_look_ahead.*)

Depending on technology it can be necessary that the CNC informs the PLC about changes in velocity. In this case, if velocity will fall below a speed limit the CNC generates a logic signal „Speed limit detected” (SLD).

Speed limit look ahead (speed_limit_look_ahead.*) 1:
Fig. 2-7: Timing example of speed limit look ahead

Extract from channel parameters list: 

speed_limit_look_ahead .f_enable 1 0: disabled 1: enabled 
speed_limit_look_ahead .v_limit 750 [0.1%] of programmed speed 
speed_limit_look_ahead .f_time 1 unit of following parameters 
speed_limit_look_ahead .dist_to_corner 5000 [0.1µm or µs] 
speed_limit_look_ahead .dist_from_corner 6000 [0.1µm or µs] 
speed_limit_look_ahead .f_override_weight_v_limit 0 0: disabled 1: enabled
Further Information