SBC PCD2.M5 Series - User Inputs and Outputs; Basics; PCD2.M5_ 24 VDC Interrupt Inputs

Hardware Manual for the PCD2.M5 Series│Document 26/856; Version EN 12│2014-07-24
Saia-Burgess Controls AG
User inputs and outputs
PCD2.M5_ Classic CPUs and expansion housings
3-53
3
3.17 User inputs and outputs
3.17.1 Basics
Becauseoftheinputltersandtheeffectofthecycletime,thedigitalinputmodules
are not suitable for immediate reaction to events or for rapid counting processes.
Whenapositiveedgeisdetectedattheuserinput,anassociatedXOBiscalled(e.g.
XOB20).ThecodeinthisXOBdeneshowtheunitshouldreacttotheevent.The
codeintheXOBcalledfromtheuserinputmustbekeptasbriefaspossibletoallow
enough time between the interrupts to process the rest of the user program.
ManyFBoxesareintendedforcyclicinvocationandsonotsuitableforuseinXOBs,
or only in a limited way.
Exception:theFBoxesintheGraftecfamily(standardlibrary)arewellsuited
3.17.2 PCD2.M5_24VDCinterruptinputs
Theinterruptinputs(alsocalleduserinputs)arelocatedonthemotherboardandcan
beconnectedviaa10-pole,plug-interminalblock(X6-terminals30to39).Source
operation is always used.
Pin Inputs XOB called in case of
a positive edge
Direct input
query
Outputs Direct output
query
39 IX0 XOB20 I 8100
38 IX1 XOB21 I 8101
37 IX2 XOB22 I 8102
36 IX3 XOB23 I 8103
35 IX4*
34 IX5*
33 out0 O 8104
32 out1 O 8105