Chapter 12 Troubleshooting
1
About MC_CamIn Instruction
MC_CamIn Execution Process
The MC_CamIn execution process figure:
Slave axis position
Master axis position
MC_CamIn Execution Process
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Stage 1: Trigger and execute the MC_CamIn instruction.
Stage 2: Wait for the start of the engagement.
Stage 3: The slave axis starts to perform the engagement action as the master axis reaches the
position where the engagement starts.
Stage 4: The engagement is ongoing.
Stage 5: The master axis and slave axis achieve the synchronization as the engagement is
completed.
Stage 6: The master axis and slave axis are in the synchronous motion.
Stage 1: Trigger and execute the MC_CamIn instruction.
The MC_CamIn instruction is executed at this time and then the slave will enter the state of
waiting for the start of the engagement immediately.
NOTE: If ActivationPosition=0 and ActivationMode=0 (relative axis position), the slave axis
will move from current speed to SYNC speed. Except in the case above, the slave axis will
stop moving immediately! All set input parameters of the MC_CamIn instruction will be read
and retained for use in the execution.
Stage 2: Wait for the start of the engagement.
The slave axis waits for the timing for performing the engagement action in the standstill state.
The time to start the engagement is when the master axis passes the position specified by the
parameter ActivationPosition. In different circumstances, the period of time the slave axis
waits for is different. If the master axis is at the position specified by ActivationPosition as the
MC_CamIn instruction is executed, the slave axis starts the engagement action immediately.
If the master axis never reaches the position specified by ActivationPosition, the slave axis will
never start to perform the engagement action and the cam synchronization will never come
true. The parameters ActivationPosition and ActivationMode are used at this stage.
Stage 3: The slave axis starts to perform the engagement action when the master axis
passes the position specified by ActivationPosition. The parameters, MasterAbsolute,
SlaveAbsolute, MasterOffset, SlaveOffset, MasterScaling and SlaveScaling will work at the
moment for making sure of the corresponding relationship between the master axis position
and slave axis position and the cam phase.
Stage 4: The engagement is ongoing.
The slave axis performs the engagement in the way specified by the StartMode parameter.
Besides StartMode, the parameters Velocity, Acceleration and Deceleration also works at this
stage. The motion features about velocity, acceleration/ deceleration of the slave axis are
determined by these parameters in the engagement.
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