A sequence controller for a machine tool and a method of preparing and executing sequence program for sequence controller used in machine tool control

摘要

A sequence controller executes sequence control of a machine tool through a sequence program by executing a subroutine program. A function command specifying a subroutine (ROT SUB 6) is divided into control condition data (RNO, DIR, POS, ACT) and operational parameters (Number of rotational positionings, present position address etc.). A memory holds the control condition data (RNO, DIR, POS, ACT). In response to a command the control condition data is read from the memory to a register. Under control of the subroutine program the control condition data is read from the register and the operational parameters are read. The result of. execution of the subroutine program is stored in the memory and the machine tool is controlled in dependence upon that result.;The subroutine program thus includes command (RD or. RD. STK) for reading the control condition data from the register, and operational parameter data. Sequence control involving the subroutine program can be represented in a sequence diagram in which a function command for the subroutine is divided into control conditions (RNO, DIR, POS, ACT) and parameters (number of rotational positionings present position address etc.).