Kenwood PWR 18-2 User manual

©PRINTEDINJAPANB63-0054-10(MC)
94/121110 987654321 93/1211109
PWR series
INSTRUCTIONMANUAL
(ForRemoteControlOperation)
KENWOODCORPORATION
KENWOOD

CONTENTS
1. OUTLINE3
2. FEATURES 3
3. SPECIFICATIONS4
4.PRECAUTIONSFORUSE...4
5.DIRECTIONSFORUSE7
1. MASTER Operation8
2. ComputerControl9
3. GP-IB Control12
4. RemoteControl...12
6.INFORMATION MESSAGE FORMATS13
7.TRANSMISSION CODES 14
8.PWRTRANSMISSION/RECEPTIONMethods15
9. MESSAGE STRUCTURE 19
10.FUNCTIONSBY COMMAND 20
1. LISTEN Function20
1) Output VoltageSet20
2) Output CurrentSet20
3) DelayTimeSet20
4) TrackingSet20
5) Settingof PRESET Parameters20
6) Output ON/OFF Set.... 21
7) Output Protect ON/OFF Set21
8) DisplaySet21
9) DisplayofDelayTime21
10) PRESET/VARIABLE Selection21
11) LOCAL Mode Set21
12) LOCAL LockoutSet22
13) Status Output Request22
2.TALK Function22
1) Output of Output Voltage,
Output Current,OperationStatus22
2) Output of Information on VARIABLE/
all PRESETS 23
3) Status Output forAll Keys 25
4) ID Information Output 26
3.SERVICE REQUEST Function26
1) ServiceRequestAllow/bisallow26
2) ConstantVoltage/ConstantCurrent
Mode Change Notification 26
3) Notification ofAlarm Mode or Output
Voltage with Error27
11. PARAMETER SET RANGES 27
12. REMOTE CONTROLE SAMPLE PROGRAMS 28
2

1. OUTLINE
2. FEATURES
The PWR Series isa fullyremote-controllable, multiple-output
DC constant-voltage/currentpowersupply.The series incor-
porates a LISTENER function,whichallowsremotecontrolof
all thefunctionsofthePW Series, anda TALKER function,
which allowsread-backofallpresetconditionsand output cur-
rent/voltage values.
Equipped witha computer-controlledmeasurementsystemand
numerous programmablefunctions,thePWR Series isa ver-
satile machinewhichisusefulfora widerangeofapplications.
Guidelines onInstructionManualUsage
The PWR series instructionmanualcomesintwo sets, one
forremotecontrolandtheotherforthepowersupply.
This instructionmanualisfortheformer. Refer totheother
manual forthepowersupply.
• Expansion to System-Level PowerSupplyvia
GP-IB Control
The PWRcanbecombinedwiththe GP-IB adapter (GP-620,
sold separately)toenableusewithautomationmeasurement
systems, andisequippedwitha LISTENER/TALKER function
thatenablescontrolofalltheunit'sfunctionsandenables read-
back ofall output voltage/current values. UsingIDrecognition,
allows constructionofhigh-security systems capableofcon-
trolling uptofourunits.
• Expansion toProgrammablePowerSupplyvia
Computer Control
The PWRcanbeconnectedtoanexternalcomputertoenable
functioningasa programmablepowersupply,forusein simu-
lationandother experiments. A systemcan easily byconstruct-
ed toenablecontrolofallthemachine'sfunctions,aswellas
read-back ofall output voltage/current values.
• MASTER ModeOperation
Withincorporationofthe built-in ONE CONTROL function, cen-
tralized controlofmultipleunitsispossible.Oneunitofa given
modelcanbeusedasthe MASTER tocontrol(underthe same
conditions)allthefunctionsofuptofour SLAVE unitsofthe
same model.
• ExternalRemoteControl
The PWRcanbeusedincombinationwiththe RT-63 Remote
controller(soldseparately)toenableremotecontrolofupto
fourunitsforfunctions such asswitchingofpreset values (out-
putvoltage)and ON/OFF switchingof output voltageandout-
putprotect.Inaddition,remotecontrolcanbeeffectedviathe
RT- 63usingexternalcontactsignalsandlogic signals.
3

3. SPECIFICATIONS
4. PRECAUTIONS FORUSE
Datatransmis-
sion speed
9600 bit/sec,error within 5%
Datacode
structure
startbit1 bit
databit7 bit
paritybit1 bit
stopbit1 bit
Paritymethod even parity
Max.lengthof
controlcord 1.5m
Max.numberof
controllable
machines
4units
Signal method
single-pass NRZ0:5V
1:0V
Please keepthefollowinginmindwhenreadingthis
manual. Thismanualwaswrittenforusewithallfour
models ofthePWR Series. However, since theremaybe
commands thatdonotapplytotheparticularPWR Ser-
ies modelyouare using, checktheentrytotherightof
each commandtoconfirmforwhichmodelsthecom-
mandisapplicable.
Model name Abbreviation
PWR 18-2
(18-2)
PWR 36-1
(36-1)
PWR 18-1T
(18-T)
PWR 18-1.80.
(18-Q)
*Whenconnectingthemachinetocontrolunitssuchascom-
puters,orwheninterconnecting multiple unitsofthemachine
with eachother,useonlytheconnectingcordsprovided.
* Since thetemperatureoftheheatsinkcanbecomequite
highdependinguponthemachine'sstateofoperation,do
notallowtheprovidedconnectingcordstocomeincontact
with theheatsink.
*Whenconnecting multiple machines,erroneousconnection
ofthe REMOTE INterminal with themachine'sINterminal
can bea cause ofmachinebreakdown.Besuretoconnect
onlyINandOUTterminalstoeachother.
4

* Whencontrollingthisunitwitha high-speedcomputer,etc.,
thewaitingtimebetweenelectricvoltage/currentshouldbe
about50mstotransmitthem successively. Withoutthe
waitingtime,commandsmaynotbecarriedout(commands
may drop).
EXPLANATION OF TERMINOLOGY
o MASTER Unit:A PWR Series unit used asthecontrollerto
controlotherPWR Series units.
• ThePWRunitthat carries the ADDRESS
NO. "0" during MASTER mode
operation.
• Theterminaldevice used in RS-232
control.
• Controlling GP-IB
GP-620 (GP-IB adapter)
• RemoteControl
RT-63 (RemoteController)
o SLAVE Unit:A PWR Series unitthatiscontrolledbya
MASTER unit.
These unitscarry ADDRESS NO.'sother
than"0".
o REMOTE State:Thestateinwhicha SLAVE unitcannotbe
operated bythe usual operating keys be-
cause itisbeingcontrolledbya MASTER
unit.
o LOCAL State:Thestateinwhicha PWRunitcanbe con-
trolledviaitsowncontrol keys.
5

EXPLANATION OF REMOTE CONNECTOR
'OUT" Side
© FRAME GND
©
© PW-BUS
© SignalGND
©
©
• Terminals1,3 and4 ofthe REMOTE connectorare
connected internally(insidethePWRunit)toOUTter-
minals 1,3 and4,respectively.
• Usetheprovidedcordsforconnectiontothe REMOTE
connector.
When switchingfromtheremotecontrolmodetothelo-
cal mode,anysettingmadeintheformerbecomes car-
riedontothelatter.However,anysettingmadepriorto
switchingtotheremotecontrolmodebecomesvoid.
* Neither PWR18-2 or PWR36-1 areequippedwiththe
DELAY function.However,ifthesetwounitsareused
as slaves underthecontrolofsignalsfromsome
master unit (PWR with DELAY functionorcomputer)
itbecomespossibletosetthedelaytimethrough such
master unit.
* Take notethatwhenswitchingfromtheremotecon-
trol modetothelocalmode,any DELAY timesetting
made intheformerbecomescarriedontothelatter.
6
"IN" Side
0 FRAME GND:ConnectedtothePWRunit'sframeand
totheGNDterminal.
(2) TXD: The PWR's signaltransmissionterminal.
(3) PW-BUS: Thesignalreception/transmissionterminal
forcommunicationbetweenPWRunits.
© SignalGND:Thegroundfor RXD, TXD, PW-BUS, and
+ 5 V.
© RXD:The PWR's signalreceptionterminal.
(6) + 5 V:GeneratedinsidethePWRunit.Theout-
putcurrentis200mAmax.

5. DIRECTIONSFORUSE
1. MASTEROperation
During MASTER Operation,the MASTER unitoperatesin
TALK ONLY mode,andthe SLAVE unitsoperatein LISTEN
ONLY mode.
Therefore, thereshouldbenointermixingofmachinetypes,
and machinesofallthesamemodelshouldbe used.
©Interconnectingmachineswiththeconnecting cords.
Turn thepowerswitchesofallthemachinesto "OFF" and,us-
ingtheconnectingcordsprovided,connectthemachinesas
shown below.BesuretoconnectonlyINterminalstoOUTter-
minals, andneverconnectINtoIN.
(DDesignatingthe MASTER Unit.
1) Turnthe POWER switchofPWR# 1 to"ON"whiledepress-
ingtheA key.WhentheV.Adisplayappearsasshowninthe
diagrambelow, release theA key.
2) After POWER ON,thedisplaywillcontinuetoappearasabove
forabout3 seconds, afterwhichitwillappearasshownbelow.
Addr A Inthe
case ofa
default
parameter
TheADDRESS NO.ordinarilywillhaveaninitialvalueof
"1", unlessitispresetpreviouslytoa differentvalue.In
this case, theinitialvalueofthe ADDRESS NO.willbethe
preset value.
Up to5 machinesofthesamemodelcanbeconnected.
Ifmorethan5 machinesareconnected,controlmaybe-
comeimpossibletoachieve.
3) The ADDRESS NO.ofthe MASTER unitissetto"0"viaro-
taryencoder.The ADDRESS NO.is decreased byrotatingthe
encoder totheleftandincreasedbyrotatingtothe right. The
ADDRESS NO.canbeset fromto anyvaluefrom"0" to"26".
7
Master"0"
Slave "1"
Slave "2"
Slave "3"
Slave "A"

AddrA 0 v AddrA XV
Whenthe ADDRESS NO.issetto"0",theKEY LOCK LED
will light upgreen.
4) WhentheA keyisdepressed,the unit willleavetheAD-
DRESS settingmodeandreturntothestatedescribedin
CD,whichoccursbeforethe POWER isturnedto "OFF",
andanyofthesettingscanbechanged.The KEYLOCK LED
lightsupgreen,indicatingthatthis unit isthe MASTER unit.
TheMASTER unit canbeanyoneoftheunitsconnect-
edbytheconnectingcords,but NEVERASSIGN MORE
THAN ONEUNITAS THEMASTER UNITasthiscanlead
tooperationfailure.
(3) Designatingthe SLAVE units.
1) Asintheprocedurefordesignatingthe MASTER unit, when
designatinga SLAVE unit, turn the POWER switchto"ON"
whiledepressingtheA key,andsetthe ADDRESS NO.us-
ingtherotaryencoder.Whensetting SLAVE unit address-
es, usethenumbers from 1 to26,butdonotuse"0".
2) WhentheA keyis depressed, the unit willreturntothestate
describedin (T), whichoccursbeforethe POWER isturned
to "OFF".
3) Setthe ADDRESS NO.'softheother SLAVE unitsinthe
same way.
TheADDRESS NO.ofeach slave unit canbeselected
from amongthenumbers1 through 26.However,to
avoidconfusion,assigna unique ADDRESS NO.toeach
ofthe slave units.
(4) Initialsettingofslaveunit
Set allthesettingsofallthe SLAVE unitstomatchthoseof
the MASTER unit.
Informationonchangedsettingswillbesenttothe
SLAVE unitsviathe MASTER unit. Operationfailuremay
thereforeresultifthesettingsofthe MASTER and
SLAVES donotmatch.
8
Donotspecify"0"

© Settingremotecondition
Operate the MASTER unittoachievethedesiredsettings.
When informationonchangedsettingsissenttothe SLAVE
unitsviathe MASTER unit,allofthe SLAVE unitsgo into the
REMOTE modeandthefollowing occurs:
• TheKEY LOCK LEDlightsuporange.
• TheV/Aand DELAYLEDs gooff.
• Thesettingsofallthe SLAVE unitschangetomatchthose
ofthe MASTER unit.
Ifthe MASTER unitisusedtoattemptremoteofa SLAVE
unitwhilethe SLAVE unitisintheAddressSetmode,
the SLAVE unitwill cease tooperateandwillnolonger
accept inputfromitscontrol keys. Avoidusingthesetup
inthisway.However,ifthisconditionshouldresult,turn
offthe SLAVE unit'spowerswitchandturntheunitON
again whilepressingthe VARIABLE key.The SLAVE unit
willreturntoitsinitialstate.
(§) Switcha SLAVE unitfromtheremotemodetothe LOCAL
mode.
When theKEY LOCK LEDofa SLAVE unitislitupingreen,
theunitisinthe REMOTE mode.Inthismode,ifthekeylock
key is pressed, theKEY LOCK LEDgoesoffandtheunit
switches fromthe REMOTE modetothe LOCAL mode.The
settings oftheunitcanthenbechangedusingthecontrolson
thatunit.
Ifthe MASTER unitisoperatingatanytimeafterswitch-
inga SLAVE unitfromthe REMOTE tothe LOCAL mode,
the SLAVE unitwillreturntothe REMOTE mode.
(Z) Ifthe VARIABLE keyis pressed whiletheMEMORYLEDis
lit,the VARIABLE LEDwillblinkforabout3 seconds.
While the VARIABLE LEDisblinking,theset ADDRESS NO.
willbedisplayedontheV/Adisplay LED. The ADDRESS NO.
settingcannotbechangedatthistime.
2. ComputerControl
RS-232C Control
© Connect the machines using theprovided connecting cords.
Turn the POWER switchesofalltheunitsto "OFF" andcon-
nect theunitsasshowninthediagrambelow.
9
Slave"1" Slave
"2"
Slave "3" Slave "4"

Unlike in MASTER operation,machinesofdifferenttypes
can beconnected.However,themaximumnumberof
machines connectedshouldbelimitedtofour.
©Setthe ADDRESS NO.'softhe SLAVE units.
Set the ADDRESS NO.'softhe slave unitsinthesameway
as for MASTER operation.
Each ofthe ADDRESS NO.'sshouldbesettoa valuefrom
"1"to"26". Rememberthatoperationfailurewillresult
ifmorethantwomachineshavethesame ADDRESS
NO., orifanyofthe ADDRESS NO.'sissetto"0".
®ConnectthePWRpowersupplytothePCorotherterminal
device (MASTERunit).
RS-232C
Terminal Device
(Computeretc.)
1) Connecttheremotecontroller (PWR1 remoteconnectorIN)
withthemasterunit,usingtheconnectingcordwhichcomes
includedwiththePWR series powersupplyunit.
Use theoptional modular/D-SUB conversionconnector (TA-60)
forthe RS-232C connectoronthemasterunit.
Refer tothediagramshownbelowfortheconnectionbetween
the RS-232C connectorandPWR1remoteconnectorIN.
Connection diagramofTA-60
TerminalDevicePWR
RS232-C connector REMOTE INconnector
© MASTER unitframe
GND
©BA
©BB
© MASTER unitsignal
GND
©CA
©CC
®CF
©PWRframeGND
©RXD
©TXD
©PWRsignalGND
©NC
©NC
©CB
©CD
When connectingthe MASTER unittothe PWR, besure
thatthe POWER switchesof both unitsaresetto "OFF".
10

providedcable< drain
Use aftercuttingthe
leadingend.@ (green)
and © (blue)arenot
used. Useinsucha way
thattheotherarenot
shorted.
Use INremoteterminals©~©andOUTterminals©,@
floatedfromtheremoteIN© andOUT© terminals(from
theframeGNDterminalsonthemasterand Slave units).
Withoutthisprocedure,thePWRmaynotfunctioncor-
rectly.
©Settingtheremotecondition.
Send a controlsignalfromtheterminaldevice (MASTER unit)
tothePWR.
When aninformationmessageissentfromthe MASTER unit
toa PWRunit,thePWRunitreceivingthemessagewillswitch
fromthe LOCAL modetothe REMOTE mode,andtheKEY
LOCK LEDwill light uporange.
PWR unitsthatdonotreceiveinformation messages fromthe
MASTER unitwillremaininthe LOCAL mode,andtheirKEY
LOCK LEDs willremainunchanged.Fordetails,pleaseseethe
informationmessageformatsdescribedinthenextsection.
When a SLAVE unitinthe LOCAL mode receives both
an "LC1" and "LL1" commandfromthe MASTER unit
as aninformation message, the SLAVE unitwillnot
switch tothe REMOTE mode,butwillremainintheLO-
CAL mode.
11
2) Connectthe RS-232C connectorasshownbelow.
short short
RS-232C
connector yellow
Ired
iblack

© Switchfromthe REMOTE modetothe LOCAL mode
IftheKEY LOCK keyispressedwhilethePWRisinthe RE-
MOTE modeandthe KEY LOCK LED islituporange,thePWR
willswitchfromthe REMOTE modetothe LOCAL mode. Fur-
thermore,thePWRcanbechangedfromthe REMOTE tothe
LOCAL modeviatheterminaldevice (MASTER unit).However,
when thePWRisinthe LOCALLOCKOUT mode,itcannotbe
switched fromthe REMOTE tothe LOCAL mode.Fordetails,
please seetheinformation message formatsdescribedinthe
next section.
Aftera SLAVE unitinthe LOCAL mode receives an "LL1"
commandfromthe MASTER unitasaninformation mes-
sage, LOCAL/REMOTE switchingofthe SLAVE unit can-
notbeachievedusingitsKEY LOCK keyifthe SLAVE
is beingusedinthe REMOTE mode.
3. GP-IB Control
Using the GP-IB adapter (GP-620: optional)enables GP-IB con-
trol of4 PWR (slave) unitsby1 GP-620 (master)unit.
All PWR functionscanbecontrolled.A listener/talkerfunction
bywhichthe output voltageandelectriccurrentcanberead
outisincluded.
Refer tothe GP-620 operationmanualfordetails.
4.RemoteControl
Using theremotecontroller (RT-63: optional)enablessimul-
taneous remotecontrolofupto4 PWR (slave) units. This in-
cludes their output, ON/OFF of output protect,preset(output
value), andswitching.
Remote controlbyexternalsourcecontactsignalsandlogic
signals is also enabledviathe RT-63.
Refer to RT-63 instructionmanualfordetails.
12

6.INFORMATION MESSAGE FORMATS
Precautions RegardingRS-232CControlledPWR
Transmission/Reception Pathways
WiththePWR,one unit (MASTER unit)canbeusedtocontrol
upto4 otherunits.Whenthe MASTER unit isusedtocontrol
onlyoneother unit, itisconnectedtotheother unit bytwo sig-
nal pathways,oneforreceptionandonefortransmission.
Whenthe MASTER unit isusedtocontrol from 2-4otherunits,
the unit connecteddirectlytothe MASTER unit (the"first"unit)
is connectedbytwopathwaysasdescribedabove.Thesecond
PWR andanyothersareconnectedtothefirstPWRbya com-
monreception/transmissionpathwaythat passes viathefirst
machine's signallevelconversionamp.
Therefore, whenthereisanSRQreply from a PWRtothe
MASTER unit duringmessagetransmission from the
MASTER unit tothePWR,orwhentherearesimultane-
ous SRQreplies from multiple PWRs tothe MASTER unit,
signal collisionwilloccuroneachofthetransmissionpaths
andthe PWRs willnotoperate.Topreventthistypeofoper-
ationfailure,managethePWRreception/transmissionpath-
ways viathe CSMA/CD (carriersence multiple
accese/collision detection)method.
Block DiagramofPWRReception/Transmission
Pathways
SLAVE 1
MASTER
UNIT
REMOTE
OUT
PW-BUS
PWR CPUtrans-
1mission/reception
terminal
REMOTE
IN
PW-BUS
REMOTE
OUT
PW-BUS
REMOTE
OUT
PW-BUS
Please refertoChapterfora referenceprogramwhich uses
the CSMA/CD Method (Carrier Sense Multiple Access/Col-
lisionDetectionMethod).
The symboldenotesthe flow ofsignals. 13
signal levelconversionamp
signal level
conversion amp
REMOTE
IN
TXD
REMOTE
IN
^RXD
REMOTE
IN
PW-BUS
REMOTE
IN
PW-BUS
SLAVE 2
PWR CPUtrans-
imission/reception
terminal
SLAVE 3
PWR CPUtrans-
> mission/reception
terminal
SLAVE 4
PWR CPUtrans-
'mission/reception
terminal

7.TRANSMISSION CODES
PWR transmissionandreceptionishandlesusing 7-unit ASCII
codes. PLease refertothe following ASCII codechart.
b7
b6
b5 \ \ \ \ \ \ \
b4~b1 0
1 2
3
4
5 6 7
0000
0
NUL TC7(DLE)
SP 0
@
P P
0001 1 TCKSOH) DC1
I
1 A
Q a
q
0010 2 TC2(STX) DC2 2
B R
b r
0011 3 TC3(ETX) DC3
#
3
C S
c s
0100
4 TC4(E0T) DC4
$ 4
D
T
d t
0101 5
TC5(ENQ) TC8(NAK)
%
•5
E
U e
u
0110 6 TC6(ACK) TC9(SYN) &
6
F
V
f V
0111 7
BEL TC10(ETB)
'
7
G w g w
1000 8 FEO(BS)
CAN ( 8 H
X h
X
1001 9 FEKHT)
EM ) 9
I Y i y
1010 A FE2(LF) SUB
*
J z
J
z
1011 B FE3(VT) ESC
+ ;
K
[
k (
1100 C FE4(FF) IS4(FS)
< L
\
I I
1101 D FE5(CR) IS3(GS)
-
=
M
]
m
)
1110
E
SO IS2(RS)
>
N n ~
1111 F
SI ISKUS)
/ ? 0 — o
DEL
14

8.PWRTRANSMISSION/RECEPTION Methods
1) Information messagessent from the MASTER unit toa
SLAVE unit should begin with a transmission control charac-
ter that indicatesthestartofthemessage, followed byan
addresscharacter,a commandcharacter,a transmission
control character that indicatestheendofthemessageand,
finally,a block checkcharacter.
Multiple commandcharacterscanbesent,anda comma
(,) isusedasthe delimiter betweencommands.An infor-
mation messagesent from the MASTER unit toa PWRcan
havea maximum length of255characters, including the
spaces betweencharacters.
*Broadcast Mode
The MASTER unit cansend information messagesforallthe
SLAVE units.Addresscharactersusethenumbersymbol
(#).
Donot transmit "ST"command information datainthe
"Broadcast" mode asthisresultsincollisionofsignals
(garbledsignals).
EXAMPLE: Tosent OUTPUT information tothe SLAVE unit
having ADDRESS NO. "1":
ExplanationofBlockCheckCharacter
The block checkcharacter,whichconsistsof2 bytes,iscom-
puted from the bottom 8 bits ofthebinarysum obtained by
adding together thevaluesofthe ASCII codesforthe7 bits
from theaddresscharactertothe"endofmessage"charac-
ter.Thehexadecimalrepresentationofthisbinarysumiscon-
vertedto ASCII to obtain the block checkcharacter.
EXAMPLE:
15
-Blockcheckcharacter
Transmission control char-
actertoindicate"endof
•message"
Commandcharacters
-Addresscharacters
Transmission control char-
actertoindicate"startof
message"
ASCII
hexa-
decimal

Now, turnthe OUTPUT PROTECT ofthe ADDRESS NO.1 unit
to "OFF" andthe OUTPUT to"ON".
EXAMPLE: All slave units (when sendinginformationtoturn
the #2 OUTPUT to "ON").
SLAVE unitswillignoreanyinformation messages that con-
tain grammatical orrange errors. Spaces enteredwithinthe
command characters aretreatedasgrammatical errors.
When aninformation messages exceeds theratedvoltage,
current, or delay timeofa SLAVE unit,the SLAVE unitwill
be settoeitherthemaximumorminimumrated value.
When information messages are sent formthe MASTER
unittoa SLAVE unit,be sure thatno message is sent from
theSLAVE unittothe MASTER unit (SLAVE information
message).
2) Whenaninformation message is sent fromthe MASTER unit
toa SLAVE unit,the SLAVE unitwill answer bysending
either anaffirmativeor negative signal tothe MASTER unit.
If the SLAVE unithas received theinformation address ac-
curately, the SLAVE unitwilltransmittothe MASTER unit
a transmissioncontrol character indicatinganaffirmative
response, andan address character. Ifthe SLAVE unithas
not received theinformation address accurately, the SLAVE
unitwilljtransmittothe MASTER unita transmission con-
trol character indicatinga negative response, andan address
character.
The affirmativeornegative response sent froma SLAVE
unittothe MASTER unitisaninformation message by
which the SALVE unitindicateswhetherornotithasac-
curately received theinformation message sent toitbythe
MASTER unit. Therefore, even ifaninformation message
16
From MASTER unitto SLAVE unit
.Positive response from SLAVE unitto
MASTER unit
Address character
Transmission control character
indicating affirmative response
Negative response from SLAVE unitto
MASTER unit
Address character
Transmission control character
indicating negative response
EXAMPLE:

sent from MASTER to SLAVE containsgrammaticalor
range errors,the SLAVE unitwillsendanaffirmative
response tothe MASTER aslongastherelationshipbe-
tweentheblockcheckcharacterandtheother charac-
ters iscorrect. Likewise, evenifallthecharactersinthe
informationmessageareaccurate,the SLAVE unitwill
send a negativeresponsetothe MASTER unitifthe rela-
tionshipbetweentheblockcheckcharacterandtheother
characters isnotcorrect.
Inthe case wherethe SLAVE unittransmitsa negative
response tothe MASTER unit,the SLAVE unitdoesnot
doanything,butcontinuestooperateinthesamestate
as beforetheinformationmessagewasreceived.
However, evenifthe SLAVE unithastransmittedanaf-
firmativeresponse,iftherearegrammaticalorrangeer-
rors withintheinformation message, the SALVE unitwill
ignorethemessageandwillcontinuetooperateinthe
same stateasbeforethemessagewasreceived.
When sendinga multicommand(multiplecommand)via
information message, ifoneofthecommandcharacters
inthemulticommandcontainsa grammaticalerror,the
SLAVE unitwillignorethatonecommandcharacter.
However, the SLAVE unitwillexecutetheinstructions
containedintheothercommandcharacters.
Onlyinthebroadcastmode,however,a SLAVE unitwill
notsenda positiveoraffirmativeresponsetothe
MASTER afterreceivinganinformation message.
When aninformationmessagehasbeensentfrom
MASTER to SLAVE, thereisnoaffirmativeornegative
response sentfromthe SLAVE tothe MASTER. When
sendinga secondinformation message from MASTER to
SLAVE, wait until atleast500msaftertransmissionof
thefirstmessagehasbeencompleted.Ifnot,signalcol-
lisionmayoccuralongthePWRtransmissionpathway.
3) Aftera SLAVE unithasreceivedaninformationmessage
fromthe MASTER unitandtransmittedanaffirmative
response tothe MASTER unit,the SALVE unitexecutesthe
instructionscontainedintheinformation message.
4) Whenthe MASTER unit sends a SLAVE unitaninformation
message requestingthe TALK (statusoutput)function,and
the SLAVE unit answers withanaffirmativeresponse,the
SLAVE unitthen sends the MASTER unitaninformation
message consistingof:a transmissioncontrolcharacterto
indicatethestartofthe message, anaddresscharacter,a
message character,a transmissioncontrolcharactertoin-
dicatetheendofthemessageand,finally,a blockcheck
character.
17

EXAMPLE: Whattypeof PWR Series modelistheunitwhich
is beingcontrolledunderthe ADDRESS NO. "1" ?
The contentsofthe message sent fromthe SLAVE tothe
MASTER indicatethatthe SLAVE unitbeingcontrolledunder
ADDRESS NO.1 isa PWR18-1'. 8Q.
If annoaffirmativeornegative response is sent fromthe
MASTER unittothe SLAVE unit,the SLAVE unitwill send
its information message a totaloftwotimestothe
MASTER unit.
When sendinga MASTER-to-SLAVE information mes-
sage containinginstructionsforthe TALK function,do
so ina {"no service requests allowed" state} as signal
collision mayotherwise occur onthePWR recep-
tion/transmission pathway.
18
From MASTER unitto
SLAVE unit
Affirmative response from
SLAVE unitto MASTER unit
Information mes-
sage from SLAVE
to MASTER
-Block check character
Transmission control character
toindicate"endof message"
-Message characters
Address charater
Transmission control character
toindicate"startof message"
5) After transmission ofa SLAVE-to-MASTER information mes-
sage has finished, send anaffirmativeornegative response
fromthe MASTER unittothe SLAVE within500ms.
EXAMPLE:
From SLAVE to MASTER
From MASTER to SLAVE
If a negative response is sent, the SLAVE unitwill send itsin-
formation message tothe MASTER oncemore.
EXAMPLE:
From SLAVE to MASTER
From MASTER to SLAVE
From SLAVE to MASTER

9. MESSAGE STRUCTURE
Address SettingRanges
TheMASTER unit and SLAVE unit machineaddressescanbe
set tonumbers from "0"to"26"which,inthemessagead-
dresses, correspondtothe"@"characterortoa letter from
"A" to"Z", asshowninthe following table.
Machine Machineaddress Messageaddress
MASTER unit
0
@
SLAVE unit
1 A
SALVE unit
26 Z
One MASTER unit canbeusedto control upto four
SLAVE units.However,if more than five SLAVE units
areused together, thesystemmaynotoperate.
In information messagessent from the MASTER unit to SLAVE
units,designatethe SLAVE unitsusingthemessageaddresses.
CONTROL (LISTENFunction)
MASTER end:
ENQ destination address,commandETXBCC1 BCC2
SLAVE end:
ACK self-addressorNAKself-address
MONITORING (TALKFunction)
MASTER end:
ENQ destination addresscommandETXBCC1 BCC2
SLAVE end:
ACK self-addressorNAKself-address
ENQ destination addressmessageETXBCC1 BCC2
Controllerend:
ACK self-addressorNAKself-address
SERVICEREQUESTS
Can begeneratedatthe SLAVE end only whenthe controller
is allowing servicerequests.
SLAVE end:
ENQ distination addressmessageETXBCC1 BCC2
MASTER end:
ACK self-addressorNAKself-address
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10.FUNCTIONS BY COMMAND
Abbreviations: (18-2) = PWR 18-2 (36-1) = PWR36-1
(18-T) = PWR 18-1T (18-Q) = PWR 18-1. 8Q
**** = Insertparameter
1. LISTEN Function
1)OutputVoltage Set
Command : Setting positive tracking voltage VA **** (18-21(36-1 )(18-T)(18-Q)
Settingnegativetrackingvoltage VB **** (18-2)(36-1)(18-T)(18-Q)
Settingpositivenon-trackingvoltage VC* * ** (18-T)(18-Q)
Settingnegativenon-trackingvoltageVD ** * * (18-Q)
Effect : Sets variable reference voltage to messagevalue.
2)OutputCurrent Set
Command : Settingpositivetrackingcurrent AA **** (18-2)136-1 )(18-T)(18-Q)
Settingnegativetrackingcurrent AB **** (18-2)(36-1) (18-T) {18-Q)
Settingpositivenon-trackingcurrent AC**** (18-T) (18-Q)
Settingnegativenon-trackingcurrentAD * * * * (18-Q)
Effect : Sets variable reference current to messagevalue.
3)DelayTime Set
Command : Plus set / non-trackingbefore \ TA* *** (18-T)(18-Q)
V trackingafter J
Minusset / trackingbefore \ TB* * * * (18-T) (18-Q)
\non-trackingafter/
Effect : Sets variabledelay time to messagevalue.
The DELAY time can be set for PWR 18-2and PWR36-1 as well. The output
for these can function as tracking output.
4)Tracking Set
Command : TR0/TR1 (18-2)(36-1)(18-T)(18-Q)
Effect : Selects tracking ON ortracking OFF.
"0" turnstracking off and "1" turnstrackingon.
The tracking minus value follows the present tracking puis value. Corresponds
with the TRACKING keyonthe panel.
5)Setting of PRESET Parameters
Command: Voltage Set
PRESET 1
Settingpositivetrackingvoltage VE * ** * (18-21(36-1 )(18-T)(18-Q)
Settingnegativetrackingvoltage VF **** (18-2)(36-1)(18-T)(18-Q)
Settingpositivenon-trackingvoltage VG * *** (18-T) (18-Q)
Settingnegativenon-trackingvoltage VH ** * * (18-Q)
PRESET 2
Settingpositivetrackingvoltage VJ * * * * (18-2)(36-1)(18-T)(18-Q)
Settingnegativetrackingvoltage VK **** (18-2)(36-1)(18-T)(18-Q)
Settingpositivenon-trackingvoltage VL** * * (18-T)(18-Q)
Settingnegativenon-trackingvoltage VM * * ** (18-Q)
PRESET 3
Settingpositivetrackingvoltage VN **** (18-2)(36-1)(18-T)(18-Q)
Setting negative trackingvoltage VP » ** * (18-2)(36-1)(18-T)(18-Q)
Settingpositivenon-trackingvoltage VQ* * * * (18-TM18-Q)
Settingnegativenon-trackingvoltage VR * * ** (18-Q)
Current Set
PRESET 1
Settingpositivetrackingcurrent AE** * * (18-2)(36-1)(18-T)(18-Q)
Settingnegativetrackingcurrent AF** * * (18-2){36-1)(18-T)(18-Q)
Settingpositivenon-trackingcurrent AG* * ** (18-TM18-Q)
Settingnegativenon-trackingcurrentAH**** (18-Q)
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