Sharp Computer Monitor Sharp PN-L802B LCD Monitor User Manual

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32
E
Controlling the Monitor with a PC (RS-232C)
YoucancontrolthismonitorfromaPCviaRS-232C(COM
port)onthePC.
You can also connect multiple monitors via a daisy chain by
usingaPC.ByassigningIDnumberstoeachmonitor(see
page33),youcanmakeinputmodeselection/adjustmentor
cancheckthestatusofaspecicmonitor.
Precautions when the PN-ZB01 (optional) is attached
• TocontrolthemonitorviaRS-232C,setRS-232C/LAN
SELECTtoRS-232C.
• YoucannotuseRS-232CandLANcontrolsimultaneously.
PC connection
n
One-to-one connection with a PC
ConnectwithRS-232straightcablebetweenthePC’sCOM
port(RS-232Cconnector)andtheRS-232Cinputterminalon
the monitor.
RS-232 straight cable
(commercially available)
To COM port
PC
RS-232C input terminal
n
Daisy chain connection…
Advanced operation
ConnectwithRS-232straightcablebetweenthePC’sCOM
port(RS-232Cconnector)andtheRS-232Cinputterminalon
therstmonitor.
Next,connectRS-232straightcabletotherstmonitor’s
RS-232Coutputterminalandtothesecondmonitor’s
RS-232Cinputterminal.Connectinthesamewaytothethird
andsubsequentmonitors.
Upto25monitorscanbeconnected.(Dependingonthe
length of the cable used and the surrounding environment.)
To COM port
RS-232 straight cables
(commercially available)
PC
First monitor
Second monitor
RS-232C
input terminal
RS-232C
output terminal
Communication conditions
SettheRS-232CcommunicationsettingsonthePCtomatch
the monitor’s communication settings as follows:
Baudrate *
Stop bit
1bit
Datalength 8 bits Flowcontrol None
Parity bit None
*SettothesamebaudrateastheBAUDRATEsettingof
SETUPmenu.(Initialsetting:38400bps)
*Whenconnectingmultiplemonitorsinadaisychain,setall
monitorstothesameBAUDRATE.
Communication procedure
n
Command format
WhenacommandissentfromthePCtothemonitor,the
monitor operates according to the received command and
sendsaresponsemessagetothePC.
C1 C2 C3 C4 P1 P2 P3 P4
Return code
Command field
(4 prescribed
alphanumerical characters
)
Parameter field
(4 character string comprised of:
0-9, +, -, space, ?)
Example:VOLM0030
VOLM
30
* Besuretoinput4charactersfortheparameter.Padwith
spaces (“
”) if necessary.
(“
”isareturncode(0D
H
,0A
H
or0D
H
))
Wrong :VOLM30
Right :VOLM 30
Wheninputtinganegativevalue,specifyanumericalvaluein
three digits.
Example:AUTR-005
DonotusespacesforMPOS,DATE,andSC01through
SC08.Specifyparametersusingaspeciednumberof
characters.
Example:MPOS010097
Ifacommandhas“R”listedfor“DIRECTION”inthe
“RS-232Ccommandtable”onpage36,thecurrentvaluecan
be returned by using “?” as the parameter.
Example:
VOLM???? ←
FromPCtomonitor(Howmuch
is current volume setting?).
30 ←
FrommonitortoPC(Current
volumesetting:30).
* IfanIDnumber(seepage33)hasbeenassigned
(Forexample,IDnumber=1).
VOLM
? ←
FromPCtomonitor.
30 001 ←
FrommonitortoPC.

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