What is the meaning of PLC constant?

PLC constant is that we set a good time in the program, after running in the process does not change the number, as we set a timer time is 10s, then 10 is constant, relatively constant is variable, The variable can change the value.

For example, we can set the time of a certain timer to be the PLC’s memory channel DM100, and then we can give the DM100 different values during the running process. The constant has a decimal number (that is, every ten in one), and the binary number (the two used in the machine) is octal, hexadecimal, etc. There are 32 more digits you should ask, like 1111 is 4 digits.

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