SEQUENCE PROGRAM PROCESSOR USED FOR TRACING OF SEQUENCE PROGRAM

A program editor includes a compile unit that analyzes an address of an instruction between a trace start position and a trace end position set in a sequence program by a program editing unit, inserts a transfer instruction about transferring a signal value to a tracing memory, and converts the sequence program to an object code of the sequence program containing a sampling address table in which the analyzed address is set and an execution program. A programmable controller includes: a sampling address setting unit that sets a sampling address in the tracing memory on the basis of the sampling address table in the object code of the sequence program; and a code execution unit that executes the object code of the sequence program and stores the signal value in the tracing memory in accordance with the transfer instruction.