What is the opcode of the sequence control section start instruction?

The operation code of the sequence control section start instruction is SCR; sequence control is an open-loop control method that controls in time sequence or logical sequence. It is characterized by inspection, judgment, and control in a predetermined order. The SCR instruction defines the beginning of a sequence control program segment.

The operating environment of this tutorial: Windows 10 system, DELL G3 computer.

What is the opcode of the sequence control section start instruction?

The opcode of the sequence control section start instruction is SCR.

Sequential control is an open-loop control method that controls in chronological or logical order. It is characterized by the process of inspection, judgment, and control in a predetermined order. The sequence control system consists of sequence control devices, detection components, actuators and controlled industrial objects. The sequence control device, also known as the sequence controller, includes operation signal processing, logic processing, fault display, alarm and comparison detection. Sequence controllers include fixed sequence controllers, matrix sequence controllers, table program controllers and programmable programmable controllers. Mainly used in the control of processes such as machinery, chemical industry, material handling and transportation, as well as manipulators and production automatic lines.

Sequential control system is a widely used industrial control system. In the field of mechatronics, it is mainly used for automated machine operation and manufacturing process control. Sequential control adopts switch control mode, and the turning on or off of the output variable is a function of a series of input switching conditions. According to whether the switching condition is a time function or an event function, the sequential control system is divided into two types: time-driven and event-driven.

Sequential control system Sequential control refers to the control of controlling actions one after another in a preset sequence. Mature programmable controllers are often used to complete sequential control. In the mechanical manufacturing automation control system, sequence control has gone through three stages: fixed-program relay control, combined logic sequence control and computer programmable controller.

Sequential Control Loading Instruction (SCR)

##LSCR S0.0

This instruction defines a sequential control The beginning of the program section, S0.0 is the start bit of this section.

Extended knowledge

Sequential control switching command (SCRT)

Sequential control relay command

SCRT S0.1

This instruction is used to specify the next program segment to be started and to switch between this program segment and another program segment. . S0.1 is the flag bit of the next program segment.

When executing this instruction, on the one hand, S0.1 of the next section is set so that the next program section can start working. On the other hand, S0.0 of this section is reset at the same time so that this program section stops working.

Sequence control end command (SCRE)

Sequence control relay command

SCRE

This instruction is used to end this program segment. A sequence control program section must be ended with this instruction.

For more related knowledge, please visit the

FAQ column!

The above is the detailed content of What is the opcode of the sequence control section start instruction?. For more information, please follow other related articles on the PHP Chinese website!