PLC programming often need to use different commands to obtain different information on the switch
this is plc programming examples1. Get information on the rising edge
2. Get information falling edge
3. Get level information
this is plc programming examples
1. Get information on the rising edge
To obtain information on the rising edge of the input signal by the transition instruction, contacts and trigger rising edge pulse
2. Get information falling edge
To obtain information on falling edge the input signal drops by contact and falling edge pulse trigger
3. Get level information
If the button corresponding to the input port is normally open, the program can be obtained through a high level of information normally open contact, normally closed contact information to obtain Low level
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