Software verifying method of process controller

TL;DR: In this article, the authors propose a technique to verify software easily without connecting a special device, by setting data for verification and checking operated data from a man-machine interface device.

Abstract: PURPOSE:To verify software easily without connecting a special device, by setting data for verification and checking operated data from a man-machine interface device. CONSTITUTION:In case of verification of software, connections among input control parts 28, output control parts 29, and control blocks 30 are made ineffective, and input/output data of individual control blocks are not transferred. In this state, data of a control block in a main memory is read out by the indication from a man-machine interface device 25, and data of an input data part 36, an output data part 37, a function decription language classification storage part 38, and a function description part 39 are described in the form of a control block 35 on a screen 34 of a CRT. A processing according with the description part 39 is performed after a certain input pattern is written in the data part 36 by the device 25, and the result is written in the data part 37 and is displayed on the screen 34. This processing result is read by the device 25 to discriminate whether it is a prescribed pattern or not. This operation is performed for all blocks.