FX2N programm memory extension

[Yevgeny]

Is there any way of adding some ksteps for FX2N PLC? We have one installed on our technological line. And now we need to upgrade PLC programm adding several new regulators. But all 8ksteps are already used.

[Goody]

on a program of 8k there must be a lot of NOP's in there (thats No Operation) they are left in the program each time something is altered or deleted. Each one takes 1 step of memory. Depends on how much you need to free up. There are 16K eeproms. But I have recovered many 100's of steps by going through the program in list mode and deleting the NOP's - they often come in great contiguos swathes as you go through the program.

[Inntele]

Goody is right. But likely deletion of NOP commands may not solve this problem. Therefore you can use an external memory card or to look how to do the program shorter. An example, five years ago I did the program for steam boiler on FX2N, where whole program has occupied about 2K steps. If you interested in reduction program and wish to get consultation, you can talk with me directly. Good luck

[Sergei Troizky]

Be aware, that on some PLC models "memory extension card" does not add to existing memory, but replaces it. Edited March 3, 2010 by Sergei Troizky

[Crossbow]

FX-RAM-8 is an 8K RAM EXTENSION. All other memory cards only replace the internal memory. You could use FX-EEPROM-16 to have 16K of EEPROM. The 8K RAM is the only one which adds to base.

[Yevgeny]

Thank you all for replies! I suppose FX-RAM-8 or FX-EEPROM-16 is just what I need! The fact is that my friend is working on the project, not me. So I'm not sure if he is able to reduce program size by rewriting it or even delete NOPs. He is good in tuning regulators, not programming. So extension card suits him best. Thanks a lot for helping me!