AVOCOR AVF- 6500 Series, Руководство по установке и эксплуатации

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6. Exte rna l C o ntro l
In a d d itio n to using the d isp la y ke yp a d o r re mo te c o ntro l unit, yo u c a n c o ntro l the d isp la y using a se ria l (RS-232)
link to se nd ASC II c o mma nd s a nd re c e ive re sp o nse s to tho se c o mma nd s.
Yo u a lso use d isc re te infra re d (IR) c o ntro l c o d e s to p ro g ra m a third -p a rty re mo te c o ntro l unit. Fo r mo re info rma tio n,
re fe r to Using Disc re te IR C o d e s o n p a g e 64.
Se ria l C o m m unic a tio ns
The d isp la y use s a simp le te xt-b a se d c o ntro l p ro to c o l to ta ke re q ue sts fro m c o ntro l d e vic e s a nd to p ro vid e
re sp o nse s to suc h d e vic e s. This se c tio n d e sc rib e s ho w to se nd c o ntro l me ssa g e s o ve r a se ria l link b e tw e e n the
d isp la y a nd a n a uto ma tio n/ c o ntro l syste m o r a PC running a te rmina l e mula tio n p ro g ra m suc h a s Wind o ws
®
Hyp e rTe rmina l o r Te ra Te rm.
RS- 232 C o nne c tio n a nd Po rt C o nfig ura tio n
C o nne c t yo ur c o ntro l syste m o r PC to the RS-232 inp ut o f the d isp la y a s sho w n in Fig ure 3-2.
C o nfig ure the RS-232 c o ntro lle r o r PC se ria l p o rt a s fo llo ws: no p a rity, 8 d a ta b its, 1 sto p b it a nd no flo w c o ntro l.
Se t the b a ud ra te to 115200, to ma tc h tha t o f the d isp la y RS-232 p o rt.
C o m m a nd a nd Re sp o nse Fo rm a t
C o mma nd s se nt fro m a n a uto ma tio n/ c o ntro l syste m o r PC to the d isp la y must ha ve the fo llo wing fo rma t:
[STX] [IDT] [TYPE] [C MD] ([VALUE] o r [REPLY]) [ETX] [C R]
Whe re :
• [STX] ind ic a te s the sta rt o f the c o mma nd d a ta (a lwa ys 07).
• [IDT] is the d isp la y ID (a lw a ys 01).
• [TYPE] is the c o mma nd typ e :
 00 = re turn to ho st (re sp o nse fro m the LC D p a ne l)
 01 = re a d / a c tio n
 02 = write
• [VALUE] is the p a ra me te r se tting fo r the c o mma nd .
• [REPLY] is the p a ra me te r se tting fo r the c o mma nd , a c kno wle d g e d b y the d isp la y in its re sp o nse to a
c o mma nd .
• [ETX] ind ic a te s the e nd o f the c o mma nd d a ta (a lwa ys 08).
• [C R] is the ASC II c a rria g e re turn ke y (0x0D).