Using Eprom In Plc

[RODELF]

HI
I AM THE USER OF SIEMENS SIMATIC S5 115U .I WANT TO RUN PLC FROM EPROM.BUT I ENCOUNTER WITH SOME PROBLEMS:
1) THE ANALOG CARD CAN NOT CREAT THE REFERENCE VOLTAGE FOR SPEED VARIATION OF MOTOR.( BUT IN RUNNING WITHOUT EPROM THIS PROBLEM DOES NOT OCCURE ).
2)HOW CAN I COPY ALL THE EPROM TO RAM OF CPU?

THANKS.

 

[RRobbins]

The problem is: you are trying to read and write the value that is stored on the eprom. The value has to be in memory. To read a program from the eprom can be done with a "Prommer". It will alow you to read the prom to a laptop and modify it, put it in the CPU, monitor, etc. As far as removing the eprom and leaving the program running, you could do what I have seen others do, while the CPU is running, and power ON, pull the eprom out. DON"T put it back with the power on.