33 E
Controlling the Monitor with a PC (RS-232C)
nResponse code formatWhen a command has been executed correctly
O K Return code
(0DH, 0AH)
A response is returned after a command is executed.
* IfanIDnumberhasbeenassigned
O K SPC 0 0 1
ID number of respondin
g
monitor
Space (20H) Return code
(0DH, 0AH)
When a command has not been executed
R R E Return code
(0DH, 0AH)
* IfanIDnumberhasbeenassigned
R R E SPC 0 0 1
ID n
u
m
be
r
Space (20H) Return code
(0DH, 0AH)
TIPS
• “ERR”isreturnedwhenthereisnorelevantcommandor
when the command cannot be used in the current state of
the monitor.
•Ifcommunicationhasnotbeenestablishedforreasons
suchasabadconnectionbetweenthePCandmonitor,
nothingisreturned(notevenERR).
•“ERR”maybereturnedwhenacommandcannotbe
received correctly due to interference from the surrounding
environment.
Please ensure that the system or software retries the
command if this occurs.
•IfnomonitorhasbeenassignedthedesignatedIDnumber
(e.g.ifthecommandIDSL0002 is used, but no monitor
withIDnumber:2isfound),noresponseisreturned.
If execution of the command is taking some time
I W T A Return code
(0DH, 0AH)
Whenthefollowingcommandsareused,“WAIT”isreturned.
Inthiscase,avaluewillbereturnedifyouwaitawhile.Donot
send any command during this period.
NoIDnumberisattachedtoWAITresponse.
• CommandswhichreturnWAIT:
1. Whenrepeatercontrolisused
2. WhenanIDSLorIDLKcommandisused
3. Whenoneofthefollowingcommandsisused:RSET,
INPS,ASNC,WIDE,PXSL,POWR,AGIN,MWIN,
MWIP,MWPP
When control via RS-232C is locked (to prevent use)
using the operation lock function (see page 31)
E C D K O L Return code
(0DH, 0AH)
When RS-232C/LAN SELECT is set to LAN
U N S E L E C T E D
Return code
(0DH, 0AH)
• AfterOKorERRisreturned,youmustsendthefollowing
commands.
Tosetatimeoutforthecommandresponse,specify10
seconds or longer.
Whenconnectingmultiplemonitorsinadaisychain,setthe
timeout to at least the product of the monitor’s position from
thecomputermultipliedby10seconds.
Example)3rdmonitorfromcomputer:30secondsorlonger.
• Provideanintervalof100msormorebetweenthe
command response and the transmission of the next
command.
VOLM0020
OK
INPS0001
WAIT
OK
Interval of 100 ms or more
TIPS
• WhenexecutingALLRESET,setthetimeoutperiodto30
seconds or longer.
• WhenturningthepoweronwhilethePOWERONDELAY
functionisinuse,setthetimeoutperiodtothePOWERON
DELAYperiod+10secondsorlonger.
Advanced operation
This section explains commands for daisy chain connection.
The basic communication procedure is the same as in the
“One-to-oneconnectionwithaPC”section.
nID numbersYoucanassignauniqueIDnumbertoeachmonitor(see
page 26). This allows you to control a particular monitor in a
daisy chain of monitors.
YoucanassignIDnumberseitherfromthemenuscreenor
fromthePCusingRS-232cable.
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ID number: 1 ID number: 2 ID number: 3 ID number: 4
If monitors are connected as shown above, you can
execute commands like “Set the volume of the monitor with
ID4to20”.
Whencontrollingmonitorslinkedinadaisychainby
designatingIDnumbers,youshouldbasicallyavoidany
duplicationofIDnumbers.
IDnumbersdonothavetobeassignedinascendingorder
startingfromthePC.Theycanalsobeconnectedasshown
below.
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ID number: 3 ID number: 2 ID number: 4 ID number: 1