Well the OP never came back - so here's my take on it....
He said he wanted a 1mS pulse generator, in the plc, inbuilt.
Yes, an accurate 1mS pulse can be generated, in the PLC, inbuilt, there is a perfectly good inbuilt clock that can be used to generate such a "pulse".
But now we have no further information - like...
what is the pulse going to be used for?
is it going to drive an output?
how accurate does it need to be?
Yet another example of not providing enough detail in the question, which leads people up paths that probably shouldn't be walked upon.
md.abdullah, if you read this, tell us exactly what you are trying to do, why you need this 1mS "pulse", what is it going to control, how critical the timing is, and anything else you can think of, and we can help you.
Without knowing more about the application, you have had replies that may be totally irrelevant to your problem.