5.4 Positioning Control5-255.4.6 J-point Control (JOG Positioning: Speed Changes)• In the J-point control, the speed can be changed while controlling the speed after the start.• After starting the J-point control, the unit operates at the speed specified in the positioningparameters of Configurator PMX.• The speed changes when the J-point control speed change flag (Y840 to Y843) turns on.(Note 1): In the system registers no. 400 and 401, select "J-point positioning start input ofpulse output CH*" of the channel to perform the J-point control. Operation diagramt [ms]f [Hz]100ms50ms20,000Hz1,000Hz10,000HzApprox. 50 ms 250ms100000pulses150 ms15,000HzJ-point speedchangeJ-point speedchange contactJ-point positioningstart contactInstructionstart conditionBusy signalOperationdone signalTable 1 Table 2 Operations of each contact• The BUSY flags (X808 to X80B) will turn on when the operation starts and turn off when theoperation is completed.• The operation done flags (X810 to X813) will turn on when the JOG operation is completed,and it will be held until the next positioning control, JOG operation, or home return operationstarts.• The target speed will be changed when the J-point speed change contacts (Y840 to Y843)turn on. The change will be enabled at the edge where the contact turns on.• Positioning control will start when J-point positioning start contacts (X0, X1, X3, X4) turn on. Characteristics of acceleration/deceleration zone when changing speeds• The speed of speed change zone changes for each scan when changing the speed in the J-point control. The speed variation is obtained by the following formula.(J-point table target speed - Startup speed) / (J-point table acceleration time or J-point tabledeceleration time)
