DS215KLDBG1AZZ03A DS200KLDBG1ABC When designing ladder diagrams with stepping instructions, it is important to pay attention to the setting of the plc initial status relays. The general plc status relays are divided into initial status relay, zero return status relay, general status relay, hold status relay and alarm status relay. The use of status relay is not limited, when the status relay is not used for step sequence control, it can also be used as an auxiliary relay.

DS215KLDBG1AZZ03A DS200KLDBG1ABC When programming with a ladder diagram, circuit blocks with many series connections should be placed as far up as possible, and circuit blocks with many parallel connections should be placed as far to the left as possible, so that it saves instructions and is beautiful. The use of the same numbered coil twice and more in the same programme is known as a double coil. Double coils are very likely to cause false action and should be avoided. Contacts should be drawn on the horizontal line, and branch lines that do not contain contacts should be placed in the vertical direction, not in the horizontal direction, so as to make it easier to read the diagrams and the graphics beautiful. Coils and command boxes cannot normally be connected directly to the left busbar, this can be done by special relays if required.

DS215KLDBG1AZZ03A DS200KLDBG1ABC After the programming is completed, the indoor simulation debugging should be carried out, which can be done with the help of analogue switches and output indicators on the plc outputs. Need analogue signal i/o, available potentiometer and multimeter with. Debugging, you can use peripheral equipment to simulate a variety of field switches and sensors state, and then observe the plc output logic is correct. The current plc products can be programmed on the pc, and direct simulation debugging.