Meaning #

Hi

I am using CQM1H CPU51 PLC. I am first time plc user. The program is written by someone else. I am trying to understand a mov(21) command. My problem is what is the meaning #. For example the command is MOV #11 DM900, the program moves #11 to DM900. What is #11 means? Is there memory location for #?

Any help is appriciated.

Thanks
Paranan

Hi
It indicates that the data is hex, or BCD in this case. For completeness, it could say #0011
Pp

Hello Paranan,

#11 simply means a constant - 11 Hexadecimal (17 Decimal).

#11 means 11 BCD inside a function that uses BCD as a base such as a timer or counter and 17 HEX in a function that uses HEX or decimal generally.