ANIMAL HOUSE ENVIRONMENT CONTROL SYSTEM WITH MULTIPLE LEVELS OF REDUNDANCY

A climate control system (20) is operated by receiving climate information from climate control input devices (21A-C) at one or more plugin modules (29A-C). The climate information is communicated from the plugin modules (29A-C) to a main control unit (27), which determines operating instructions for climate output devices (23A-C) and air inlets (25A-C). When it is detected that the main control unit (27) is not operational, the control system (20) switches to a standby control unit (37) if so equipped. The climate information is then communicated from the plugin modules (21A-C) to the standby control unit (37). The standby control unit (37) determines operating instructions for the climate output devices (23A-C) and air inlets (25A-C) based on the climate information. When it is detected that the standby control unit (37) is also not operational, the plugin modules (29A-C) switch to an autonomous mode such that operating instructions for the climate output devices (23A-C) and air inlets (25A-C) are determined by the plugin modules (29A-C). Figure 1