Abstract: Normally the equipment operation and data acquisition of measurement points of the steel pipe finishing line are realized via some visual software. However currently-used control software for the measurement point is in most cases programmed with the event drive technique, which requires that the site measurement signals must be accurate. The time circulating program, a common industrial visual software may be used to build up a main control circulation to obtain a "status drive" programming method. Since the site signals are used in a "first fetch, then execute"mode in the main control circulation, the site-signal fault-tolerant capacity of the control program as made with the said programming method is significantly enhanced, and moreover the program itself is able to realize the overall monitoring of the site signals.