Honeywell 51304485-150 Digital Input Processor

The DIVICE block is a type of multi input multi output point that provides an operation control panel for discrete devices such as motors, pumps, and on/off valves. The states of the two DC points used, S0 being the stopped state and S1 being the running state, are connected to two outputs and two inputs. The output start signal (S1) of 12A01 is DO point 12A01T, and the output stop signal (S0) is DO point 12A01P; The feedback input signal DI points are 12A01I and 12A01F, both of which are 1, indicating that 12A01 is running. When 12A01I is 0 and 12A01P is 1, it indicates that it has stopped.
The allowable condition for starting 12A01 is that PI (1) is 1, which means that all three conditions are met: the liquid level gauge is not low, the oil pressure is not low, and the oil pump has been started. When the liquid level is low, 12A01- ANDA.OUT is 1, causing 12A01P action to stop 12A01.
The powerful functional modules and superior performance of the PKS control system ensure that the device can operate smoothly within the predetermined time according to the design plan. Since its introduction in December 2004, the PKS system has been operating stably without any impact on production due to issues with the DCS system itself. Moreover, due to its superior performance such as openness, flexibility, and ease of operation, the system can independently perform configuration operations at some process points according to production needs, such as adding or modifying control schemes or changing interlocking relationships, and can be modified online without affecting normal production.