S7-400H Redundant Configration

alijuda · Mar 22, 2017

Dear Friends
I needs your help , Please Is necessary to copy all S7 Program in both PLC , Master & Slave or only in Rack-0- PLC ?
Best Regards
Ali

fredz0003 · Mar 22, 2017

Hi alijuda, you could have gotten this information from the manual please read before asking simple configuration questions. To answer your question yes, you will usually have one s7 program that will need to be downloaded to both master and slave.

Have a look here on this manual too. https://cache.industry.siemens.com/dl/files/851/22586851/att_63242/v1/S7-400_Systembersicht_e.pdf

alijuda · Mar 22, 2017

Many Thanks fredz0003 , My point as below and attached pic.
Master CPU have "S7-Program & Connections" under their tree
Slave CPU have only "Connections " under their tree
Is that normal for Redundant works

rgua · Mar 23, 2017

Yes, is normal. Two H cpus form a single station. The PG uses one program only. when you transfer the program will be loaded in both.

fredz0003 · Mar 23, 2017

alijuda said:
Many Thanks fredz0003 , My point as below and attached pic.
Master CPU have "S7-Program & Connections" under their tree
Slave CPU have only "Connections " under their tree
Is that normal for Redundant works

Yes it is normal. However @rjua mentioned when you transfer it loads on both CPU's. In my experience when I've downloaded projects to both CPU's you have to download one at a time.

I could be wrong maybe other projects are setup different, but that's just my experience.

alijuda · Mar 25, 2017

Many Thank @rjua & @fredz0003 for help

S7-400H Redundant Configration

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