Panasonic FPG-PP21

FP∑ Positioning Unit Confirming the Unit Settings and Design Contents
4-13
4.5 Internal Absolute Counter
4.5.1 How the Internal Absolute Counter Works
How the internal absolute counter works
-The positioning unit is equipped with a function that counts the number of pulses output.
-The counted value of each axis is stored in the shared memory area of the positioning unit.
-The stored value is read by the user program, enabling the position data (absolute value) to be
discerned. This is used in functions such as teaching during JOG operation.
-Using the comparison relay output function, external output can be obtained in response to the count
value, through the user program.
How the internal absolute counter operates
-When the power supply is turned OFF, the counter value is set to zero (0).
-When the table returns to the home position by a home return, the counter value automatically becomes
zero (0).
-The counter value is counted as an absolute value, based on the pulse output value.
-The value stored in the shared memory can be read using the F150 instruction in the user
program.
-The counter value can be overwritten using the F151 instruction in the user program.
Overwriting should be done while the operation is stopped.