dieselvette
Electrical
- Oct 6, 2006
- 26
Does anyone know of a way I can keep the status of my "programmable logic relay" (Siemens LOGO in this case) in memory indefinitely in the event of a power loss?
For example, as the program is running power is lost for a month. When the system is powered up again, I want the program to pick up right where it was when it left off.
Any way I can do this in the program? (With most PLC's, you can write to a memory chip periodically & then read from it upon power-up) I can't find a smart relay that allows me to do this. Only thing I can get it to do is start at a given spot in the program upon power-up.
Any way I can use something (other than the super-capacitor which most of them have) to keep the memory there?
Nic Van Engen
Electrical Technician
For example, as the program is running power is lost for a month. When the system is powered up again, I want the program to pick up right where it was when it left off.
Any way I can do this in the program? (With most PLC's, you can write to a memory chip periodically & then read from it upon power-up) I can't find a smart relay that allows me to do this. Only thing I can get it to do is start at a given spot in the program upon power-up.
Any way I can use something (other than the super-capacitor which most of them have) to keep the memory there?
Nic Van Engen
Electrical Technician
