Schneider Electric 840 USE 106 0 manual 160

Additional Guidelines for IEC Hot Standby

Programmed The only problem with logic programmed like that is, for every open pin there is as Logic, Continued much memory allocated as its data type requires. In this case there are 13 bytes of

unused memory allocated. To reduce those 13 bytes to just 1 byte means connecting a constant to every open pin that makes the logic work as if the pin was open. This is always equivalent to zero, or FALSE in this case.

Therefore, the logic should look like the diagram below.

160 840 USE 106 00 January 2003