Reduced maximum speed in security zone

In combination with the security zone of an axis the PLC can command a switchover to a reduced maximum path feed to the CNC. This value is independent of current active moving mode (G00 or G01). The security zone is defined within an upper and lower limit of the axis position. The reduced speed function is activated by the PLC signal if one axis is inside the security zone or moves into this zone. The reaction takes place in real time. This means that after an typically required deceleration phase, none of the axes moves faster than the maximum velocity (P-AXIS-00030 or P-AXIS-00503) of the corresponding security zone. Two security zones can be defined for each axis. These zones can overlap each other.

The deceleration ramp for adapting to the reduced speed is independent from the active path condition. If the axis is already in the security zone when the activation signal is received from the SPS, the CNC brakes at feedhold acceleration (P-AXIS-00024) is inactive. If the SPS signal is activated outside the zone, the CNC brakes at the G00 value (P-AXIS-00004) is inactive.