Why are FB parameters defined as register and not as constant?

FAQ #100033

Some of the parameters of the FB's for programming the H-Modules are defined as registers that have to be loaded before the call of the FB.

 

A constant can have a value up to 16383 (

14 bit). Unlike a constant, a register can hold a 31 bit value (signed). Since the values of the parameters can be up to 31 bits, it is required to use registers to hand over the parameters to the FB

 

Categories

PCD2 / Hxxx

PCD3 / Hxxx

PCD4 / Hxxx

Last update: 29.05.2015 09:17

First release: 08.06.2004 14:05

Views: 10610

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