Siemens 7 manual Data Transfer, To th e S e rM u x O b je c t a re in d ic a te d

Multiplexer Driver Developer’s Guide

7.4 Data Transfer

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7.4Data Transfer

7.4.1Block Flow Diagram for Data Received by the Module

S e rM u x fu n c tio n s s e q u e n c e , if c h a ra c te rs fro m th e p h ys ic a l D e vic e
	to th e S e rM u x O b je c t a re in d ic a te d
		W rIn d ic a te R e a d B u ffe r
re t	y e s	a ll b yte s
		s c a n n e d ?
		n o
		P ro c e s s C h a r
				n o
		F ra m e va lid ?
		ye s
		D e m u xIn d ic a te F ra m e
		A d d re s s ! = D L C I 0		y e s
				S e rP o rtIn d ic a te F ra m e
		& & U IH -F ra m e ?		o th e r p o rts th a n 0
		n o
		U IH -F ra m e ?	y e s
				s e a rc h th e n e xt C o n tro l C o m m a n d
				in th e
		n o		In fo rm a tio n fie ld
				a ll U IH -C o n tro l	ye s
				C o m m a n d s s c a n n e d ?
				S e rP o rt0 S c a n U IH C onnotro l s e e
S e rP o rt0 In d ic a te F ra m e ()		n o		s h e e t 2 ,
				c h e c k a U IH -C o n tro lF ra m e
				re tu rn S e n d P o rt
		U A -F ra m e		ye s
		o r		S e rP o rt0 C o n firm R e q u e s t
		D M -F ra m e ?
		n o
		S A B M o r
		D IS C F ra m e
		n o t v a lid
		(M a s te r)
		S e n d P o rt= =
		T R U E ?
		S e rM u xS e n d (), m u s t
	c a ll if re c e ive a F C -B it= 0 , th e n
		s ta rt th e s e n d in g
		1

Figure 6: Block flow diagram for data received by the module

Mux_Drv_DevGuide_v07	Page 30 of 36	2006-9-27
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