To that end, Shenzhen Coolmay Technology Co., Ltd. If the internal output relay status to '1', then the output relay contact closure, after the output terminal drive external load.Īll the state of the output device to keep a scan cycle. In the output refresh stage, the PLC will output the output variable in the image area into the output latch, and then produced by the latch through the output module to control the output of this cycle. Program execution phase of the operation result is placed into the output image area, and not to the output port. The state will change as the program execution process. Then the corresponding operations and operations as a result, deposited in the output image register again.įor the output image register, each element ( The execution of a program, when instructions relating to both input and output state, PLC can 'read' from the input image register corresponding to the input terminal state, 'read' from the output image register corresponding components ( In the process of execution of user programs, PLC controller in accordance with the principle of ladder diagram program scans, generally speaking, the PLC controller from left to right, from top to bottom of the steps one by one program execution.īut met jump instruction program, to jump the decision process according to jump condition meets the address. In general, the input signal is greater than the width of a scan cycle, otherwise may cause the loss of signal. Visible, PLC in the execution procedure and process the data, not directly use the scene at the time of the input signal, and using the sampling data from the input to the image area. In program execution stage and output refresh stage, the input image memory isolation with the outside world, its content remains the same, until the next scan input scan stage of the cycle is refreshed to read in the input signal. Way at this stage, PLC to scan read all the input terminal of the input signal, and the state of input into the corresponding register the input image.Īt this point, the input image register was brushed off. The process of becoming a team starts again.PLC execution process is divided into three stages, namely the input sampling stage, program execution phase, the output refresh stage, PLC scanning process: ( In this stage, the team begins anew as old members move on and new members are added. Reforming: All teams eventually lose and then add members.Performing: The team has its goals, working roles, and norms members can solve problems openly and honestly, plan new programs, and communicate with each other and the rest of the staff.Team is meshing together and becoming more cohesive and creative as openĪnd honest conflict gets resolved into productive working The team starts to establish the norms for working together, being Caring and honest acceptance of differences will foster better planning.

Natural part of developing trust and open dialogue about issues. Storming: The development of open, honest discussion of differences that can produce group conflicts. This stage is a.During this stage, team members are friendly and often will not disagree with each other’s ideas. Forming: The development of mutual acceptance during early meetings and activities.Taking the time to frequently assess where a team is in its quest towards effectiveness, and allowing the necessary focused discussion to ask why and to plan how, provides a context for its progression without risking “getting stuck” in one phase of what is a natural development.īass and Avolio (1994) identified five common stages that team members go through on their way to working together PLC teams, like any other shared-responsibility gathering, go through stages of development.

Plc process 3 stages