What conditions do process designers need to provide for automation in order to complete the PLC design?

1. PID diagram 2. Explanation of control scheme (1) Control loop (2) Interlock conditions 3. Setting of interlock and alarm values

The automation requirements for PLCs as proposed by the process engineering team should be the same as those for systems such as DCS and PCS. The main elements include: 1) P&ID diagrams; 2) lists of monitoring, alarm, interlock, and control values for parameters such as temperature, pressure, flow rate, level, and displacement； 3) Control data sheets for valves such as shut-off valves and control valves ； 4) Interlock and control instructions or interlock logic diagrams. The above conditions are provided for the automation team to use during the detailed design phase in order to prepare PLC monitoring data sheets, PLC I/O tables, sequence control diagrams, timing control diagrams, interlock logic diagrams, diagrams of complex control circuits, instrument circuit diagrams, system configuration diagrams, etc. As for the PLC system design carried out by the instrumentation team, the relevant requirements specified in HGT 20700-2014 \"Specifications for Programmable Controller System Design\" can be referred to.