Panasonic AFP7MC16EC, User Manual

Page: 288 / 504

Supplementary Functions
13-2
13.1 Software Limit
The system is designed to mechanically set the limit (+) and limit (-) to restrict the moving
range of a motor.
Separately from the mechanical limits (+) and (-), the software limit is a function to add the
limits on software for the absolute coordinate managed within the unit. As the software limit is
a function for the protection of motors and servo amplifiers, it is recommended to set them to
the values within the range of the mechanical limits (+) and (-) as below.
Table
(-) side
(+) side
Limit (+)
Ball screw
Limit (-)
Lower limit value of
software limit Upper limit value
of software limit
When exceeding the setting range of the software limit (upper and lower limit values), an error
occurs, and the deceleration stop is executed. It is necessary to clear the error and move the
motor into the range of the software limit using an operation such as JOG operation after the
stop.
Table
(-) side (+) side
Lower limit value of
software limit
The table can move within the setting
range of the software limit.
Whether the software limit is set to be available or not can be specified individually for the
positioning control, JOG operation and home return each. For example, it is possible to set
the limit software to be invalid only in the home return operation.