Festo Контроллер двигателя SFC-ST - Manual (Page 69)

4. Parametrizing blocks
4−15
Festo P.BE−SFC−DC−PB−S7−E N en 0604NH
4.4.4 Implementation
The block PRM_DB−FILE cannot function on its own, only in
combination with one of the transfer blocks can it transfer a
list of parameters. Some of the inputs or outputs must thereĆ
fore be linked directly with each other.
RD_WR_DB−FILE <−> PRM_...
_PNU OUTPUT −−> _PNU INPUT
_Subindex OUTPUT −−> _Subindex INPUT
_Length_RD OUTPUT −−> _Length INPUT
_Value_WR OUTPUT −−> _Value_WR INPUT
_Done_RD_WR INPUT <−− _Done_RD_WR OUTPUT
_Fault_RD_WR INPUT <−− _Fault_RD_WR OUTPUT
_Value_RD INPUT <−− _Value_RD OUTPUT
Tab. 4/9: Wiring table
4.4.5 Restriction
Function block RD_WR_DB−File uses internally the system
function SFC24. With this function the source and target DB
can be tested and their length defined. However, this function
is not implemented in controllers of an earlier date. The block
cannot therefrore be used there in this form.