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34),youcanmakeinputmodeselection/adjustmentor
cancheckthestatusofaspecicmonitor.
Precautions when the PN-ZB02 (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

nOne-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

nDaisy 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.)
RS-232 straight cables
(commercially available)
First monitor Second monitor
PC
To COM port
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

nCommand 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(0DH,0AHor0DH))
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37,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.