Xinje PLC programming Lessons

Soft Components :

There are many relays, timers and counters inside PLCs. They all have countless
NO (Normally ON) and NC (Normally Closed) contactors. Connecting these contactors with
the coils will make a sequential control circuit

• Input Relay ( X )  

1. Usage of the input relays

              The input relays are used to accept the external ON/OFF signal, we use X to state.

      2 .Address Specify Principle

              

• In each basic unit, specify the ID of input relay, output relay in the form of  X000~X007，X010~X017…,Y000~Y007，Y010~Y017… (octal form).
• The expansion module’s ID obeys the principle of channel 1 starts from X100/Y100, channel 2 starts from X200/Y200… 7 expansions can be connected in total

       

       3. Points to pay attention to when using:

•  For the input relay’s input filter, we use digital filter. Users can change the filter parameters via relate settings.
• PLCs are equipped with with more relays than are required for the input/output points, these can be utilized as auxiliary relays, program as normal contactors/coils.  

• Output Relay ( Y )  

1. Usage of the output relays

Output relays are the interface of drive external loads, represent with sign Y;     
      2. Address Assignment Principle      

•  In each basic unit，assign the ID of output relays in the form of Y000~Y007, Y010~Y017… this octal format.
• The ID of expansion obeys the principle of: channel 1 starts from Y100, channel 2 starts from Y200… 7 expansions could be connected totally  

• Auxiliary Relays ( M )
• Counter ( C )  
• Data Register ( D )
• FlashROM Register ( FD )  
• Constant ( B ) ( K ) ( H )  

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