| 摘要 |
PROBLEM TO BE SOLVED: To provide a programmable controller that can trace a signal address without acquiring unnecessary sampling data upon execution of an SFC, and allows a state of a signal change along an execution flow of the SFC to be visually recognized and checked.SOLUTION: A programmable controller of the present invention has a function configured to: store a signal address of a sampling object in association with steps consisting of a control program described in an SFC language; when executing the control program, detect a step in active state by monitoring an establishment of a transition condition of the active state of the step; acquire a sampling execution parameter from a step sampling parameter storage unit on the basis of the step of the active state detected by a step transition condition establishment monitor unit; and sample a state of the signal address serving as the sampling object; and record the acquired parameter as sampling data on the step of the active state.SELECTED DRAWING: Figure 1 |
