Patent ID: 6714996
Filing Date: 2004-03-30
Classification: G05B,G06F

Abstract:
A reset controlling method of a programmable controller system, which comprises at least one CPU unit which carries out the control of the entire system and a plurality of I/O units that are operated under a control of the CPU unit, wherein the CPU unit writes a command for instructing a control CPU specified information for each I/O unit, each I/O unit decodes a command instructed by the CPU unit so as to determine whether or not it is information specified by the control CPU, and holds the corresponding information specified by the control CPU in the I/O unit, the CPU unit issues commands for instructing the reset control to all the I/O units, and each I/O unit decodes the command instructing its reset control, and when it has determined that the corresponding command is instructed from the CPU unit of the controlling end, it follows the reset controlling instruction so that the resetting operation of the specific I/O unit on the system specified by the CPU unit is controlled, the CPU unit being provided with two kinds of instructions for reset-controlling the control section of the I/O unit and for reset-controlling the output section of the I/O unit, with respect to instructions for issuing a reset to each of the I/O units.