1. Operation preparation of PLC programmer

The mode switch of the programmer is placed in the “program” position, and the basic unit is placed in the “stop” position, so that the PLC is in the programming state. Before inputting the program, clear the original stored program, and then input the ladder diagram of Figure 2 into the programmable control ram.

How to use PLC programmer

Figure 1

How to use PLC programmer

Figure 2

The key operation sequence of the programmer is as follows:

How to use PLC programmer

2. If there are errors in the program, use the program to read out and find out. Modify, delete, insert function, modify the program.

3. If the program is correct, put the programmer mode switch in “monitor” position. The basic unit is placed in “run”. The PLC is running. Observe and record the following four situations.

(1) X400 on, observe Y430. Y431 output indicator light on and off.

(2) Disconnect X400 and observe Y430. Y431 output indicator light on and off.

(3) Use the monitoring function to monitor the working conditions of Y430, y431, t450 and t451 respectively.

(4) In the monitoring mode, the setting value of timer t451 is changed to 30s. Observe the change of t451.

Leave a Reply

Your email address will not be published. Required fields are marked *