Basic Operation Of Fp∑ Positioning Unit - Panasonic FPG Series Technical Manual

Fanctions of FP Σ Positioning Unit
1.2.2 Basic Operation of FP∑ Positioning Unit
Control proceeds by turning ON and OFF the shared memory and input/output flag.
① Determining the necessary data.
The types of data written to the positioning unit include control codes, the startup speed, the target
speed, the acceleration/deceleration time, and the position command value. The types and number
of required data varies depending on the objective. Programming is set up so that these data values
may be written to any desired data register.
② Transferring to the shared memory.
The data stored in the data registers is sent to the positioning unit by means of the F151 instruction,
where it waits for further instructions. The memory area which receives that transferred
data is called the "shared memory" of the positioning unit. This area is used for various types of
control, including E point control, P point control, JOG operation, JOG positioning operation, home
return(home search), and pulser input operation, and a separate shared memory area is provided for
each of the axes.
③ Initiating control operations.
In order to execute the data waiting in the positioning unit, the startup flag of the various
operation modes are turned ON. The abovementioned-programming example shows this process for
Y100. Y100 is the number of the flags that starts up the E point control of the first axis when
the unit is installed in slot 0. Separate flags are provided for each of the axes, for E point
control, P point control, home return, JOG operation, JOG positioning operation and other types of
control.
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FPΣPositioning Unit