Radio Shack TRS-80 User manual

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!I LIMITED WARRANTY ~
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I improper or abnormaluse.
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Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
0 Special features 0 Equipment needed
Connections (Controller to Computer) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Loading the Operating Program ( Ca ssette Systems) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
O Model U~ 1 odel lll . Level 1Machines 0 Model I and Model 111. Level 11Machines0 Color
Computers
Loading the Operating Program (Disk Sy~tem ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
0 Model I0 Model lll
Operation . .......... . .................. . . . . . ............ .
0 Direct Command Mode 0 Programrrnng Mode 9
Special Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... .... . .. ..... 20
0 Using the Controller Progr.un wuh Other BASIC Program ~ 0 Savmg the Program on Disk
0 Shonened Controller Program
Module Installation and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .......... . .. . .... 28
0 Lamp Dimmer and Appliance Modules 0 Wall Module 0 Operational Notes 0 Local
Control
Commo n-Sen se Troublesh oo ti ng ... .. . . ................ .. . ... .. ...... ........ . ..... .. 34
0 Intermittent or Occasional Difficulties 0 P owe r Interruptions 0 Inter co m Systems

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Plug 'n Power Controller Owner's Manual:
Copyright«:> 1981 Tandy CorporJtion,
Fon Wonh. Tcita s 76102. U.S.A.
All rights n:servcd.
Reproduction or use, without eitpress written permission from l'dndy Corporation, of any por1ion of this manual, is
prohibited. While reasonable effons have been rakcn in the preparation of the manual to assure its accuracy, Tundy
Corporation assumes no liability resulting from any errors or omissions in this rnanua.I or from the use of the infor·
mation obtained herein.
Printed in the United States of America
JO 9 8 7 6 5 4 3 2

Introduction
Th e TR S- 80 Plu g 'n Powdr" Co ntro ll er is u co nveni e nt a nd easy-t o- use system w hi ch co nn ec ts to yo ur
TRS-80 computer and ca n be progra mm ed to co nt rol lig ht s and app li ances in your home or office.
The re is no special wi rin g. Comma nd signals a re se nt over t he ex is tin g el ec t rical w ire s.
Sp ecial Features
• Controls lights and small appliances by computer while you arc home oraway
• Turns lights on or off
• Dims or brigh tens lig h ts
• Tums on or offsuch appliances as fons, coffee pots. radios. and TV sets.
Equipment Needed
This TRS-80 Plug 'n Power system includes the Plug ·n Power Controller and cassette tapes containing
the necessary software. To operate this system. you will need any Model I. Model Ill, or Color
Computer, and one or more of the following (see Figure I ):
Ap pl ia nce M od ul e (R ad io Shack Ca tal og Number 61-2681)
La mp Di mm er Mo dule (C at. N o. 61-2682)
Wa ll Modul e (Cat. No. 61-2683)
The abo ve it ems arc not in c lud ed in t his pac kage and mu st be pu rchased separat ely. (l ns ta ll at io n of
th e Wa ll M od ul e requires kn ow ledge of electrical wi rin g p rac ti ces.)
3

\'Vall Module
C•t No. 26-2683
Figure 1. Plug 'n Power Control Modules
Lamp 01mme1
Modula
Cu . N o.61 ·2682
Connections (Controller to Computer)
Refer to Figure 2.
I. Connect th e CO MPt.:T ER cable on back of the Controller to the Cas se tt e or Tape co nn ector on the
rear ofyour Computer.
2. Connect a casse tt e player (CTJ<-80 or eq ui valent) to t he CASSETTE co nn ector on b ac k of th e
Controller.
3. Connect t he POWER cord from th e Controller to an elec tri cal AC outlet.
Refer to the Module Installation sec ti on for hook- up and in stallation notes fo r the control modules.
4

Figu re 2. Controller Connections
5

Loading the Operating Program
(Cassette Systems)
Model I/Model III, Level I Machin es
I. Position t. he swit ch on top of t he Contro ll er to CASS. This allows nomial use of the cassette port for
loading programs from cassettes.
2. Insert the Level I/Color cassette into the recorder with the Level Is ide up. Rewind the tape and
prepare the recorder to be played. Be sure t he recorder's volume control is properly adjusted.
3. Power up or res et the syst em to BAS I C.
4. To load the cont.roller program type CLOAD (EHil]D. After the program is loaded, place the
Cont.roller's switch to C01'T. A clock format should appear on the screen: 00 :00. Refer to the
Operati on section before continuing.
Model I/Model III, Level Il Machines.
I. Position t he swi tch on top of the Contro ll er to CASS. Th is will allow cassette programs to be loaded
in the usual manner.
2. lnsert the Level II casseue into the recorder. For 16K RAM computers, u se the 16K side; with 32K
or 48K of RAM use the 32K side. Rewind the tape and prepare t he recorder. Be sure the reco r de r's
vo lum e co n tro l is pr ope rl y adj ust ed .
3. Power up or reset t he compu ter. Set th e approp ri ate memory si1 .e for th e program being u sed :
l 6K RAM -28670
32K RAM-45055
48 K RAM-45055
If us in g a Model rn comp ut er. t ype L when CASS? appears on th e screen.
6

4. Af t er the system is in Level II OA SIC or Model Ill BASIC. 1ype SYSTEM tElilEB). • ?w ill then be
displayed. Type L CEHIEID. and the !ape will begin loading. When loading is complete another •?
will be displayed. Position th e switch on the Con1roller to CONT. Type I (£HIEB) to execute th e
program.
5. A clock format should appear on the screen: 00 : 00. Refer to the Operation section before
continuing.
Color Computers
I. Position the sw it ch on top of the controller to CASS. This will allow nom1ul use of the cassette port
for loading cassette programs.
2 Insert the Level IJColor cassette into the recorder with the Color side up Re~md the tape and
prepare the recorder. Be sure the recorder's volume control is properly adjusted.
3. To load the Controller program;
For 4K computers type: For 16K computers type:
CLEAR 0 CEBlIID
CLOAOM CEBlIID
After the program has been loaded. OK will appear on the screen.
CLOAOM (IHIEJD
4. Posi ti on the controlle r' s switch to CONT and type EXEC tIHIE.ID to execute the program.
5. Aclock format should appear on the crcen: 00 : 00. Refer to th e Operation section before
continuing.
7

8
Loading the Operating Program (Disk Systems)
Model I
Use the TAPEDISK program 10 l ond 1h e Conrroller program into memory and then copy it into a
specified file on th e disk . To use TAPEDISK. co nn ec1 the recorder direcrly to the TRS·80 tape jack. not 10
th e Expan s ion l ni erface jack.
I. Pos iti on th e sw itch on top of th e Co nt ro ll er to CASS.
2. Insert th e Level acassette tape into the recorder. For 16K RA M computers. use the 16K '>idc of the
tape: with 32 Kor48K of RAM use the 32K s id e. Rewind 1h ~ tape and prepare t he recorder to be
played.
3. To load a nd execute TAPEDISK. type TAP ED ISKCUilm). TAl'hl>ISK will come up with th e prompt: ? .
To load the Controller program type C CEHIEID.
4. When th e tape ha s loaded. yo u arc ready to copy th e program from memory on to di sk. Type in the
following substituting th e dri\'e u ~ed for d.
For 16K ma c hines:
F LICHT /C MD : d 7 100 7010 7 12BtEHllID
For 32K and 48K machine s:
F LICHT /C MD: d B l00 0010 Bl 28 CEHIEID
Now type E CERiml to return to TRSDOS. After the Comroller pro grn rn is loaded 0 111 0 di sk, th e
program can be executed fr om TR Sl>OS by typing:
LI c HT CERIEID

Model ill
You will use the TAPh program 10 1ran <,fer in fo m 1a t io n from tape 10 di~k.
I. Po\ition the Cont rollcr\ 'wi tch 10 CASS.
2. Insert the diskeuc you wi'h 10 transfer the program 10 into Drive 0.
3. rypc TAPE < S= T • D=D l tE RIEJD . The ~crcen will di~play the prompt. CASS?. AllS\\er the prompt
by typing L. Do nol pre\\ an} otherkey.
4 Now in crt the Le\ •e l II ca\\elle tape into the recorder. For 16K R.\\1 computers. use the 16K side
of the tape: '' ith 32K and 48K ol R ·\\I u~e the 32K \ide. Rc" ind the tape and prepare the recorder.
When you arc ready pre" tE NT Eft).
5. A' the program i\ bc111g loaded. the file name. LIGHT. '""be dl\played on the \crccn. Aflcrthe
Controller program j, loaded on the disk. the program can be executed from rnsoos by typing
LIG HT CEHIIiD.
Operation
Dir ec t C omm a nd Mo de
Af ter the Controller program \lam execution. a request fo r you to e nt er the prese n1 t ime will be
made. All times should be entered in military time (24-hour clocl.. fom1at from 00:00 to 23:59).
l:.xamplcs:
12:22 am = 00:22
I:00 am = 01:00
8:00 am = 08:00 9

12:()() pm = 12:00 (noon)
3:00 pm = 15:00
8:00 pm = 20:00
12:00 am = 00:00 (mid nighl)
Af1 er yo u e nl er the li me, lh e program w ill a ss um e l he direct command mode. In lh is mode, devices
may be cont ro ll ed di rec tl y fr om lh c keyboard.
No t e: If yo u make a mis take entering t he lime . the only way tu wrrccl it is co reload the program. If
the clock docs not start counting, make sure that the Controller's switch is in the corrr position.
The direcl command display is shown in Figure 3.
In this mode ofcontrol. the commands which may be used are:
House Code
Leners A through Ps clecc and display the house code of the module you wish to control.
Uni1 Code
Numbers I through 16 select the individual control module whose house code was previously
entered. After a unit is selec1ed. a cursor > will appear co the left of chat unic number un t il another
unit code or a CLR command (see below) is cniered.
Un i1 Commands
The fo ll ow in g com ma n ds te ll 1h e selecled mod ul e whacto do. Pr ess (EHilB) a ft er each co mm and.
ON
Completely turns on t he selected module ifpreviously ·'off.''
O FF
Compleccly tum) uff c he selected module.
10

Figure 3. Direct Command Mode
DIM! -DIMS
The level of int ensity of a lamp connected to a Lamp Dimmer Module or Wall Module may be
reduced from 10 (''oN" full intensity) to (''ot ·F") . If th e select ed m od ule is on at th e time of1 he
comma11d, the level of in1ensi1y will be redu ced by the value ofthe OIM command. If the li g ht is off it
wi ll first be tumed on to full intensity ( 10) and then reduced by the va lu e of the DIM command. The
DIMI through Dl M9 commands will n ot work with Appliance Modules. See Figure 4.
11

Figure 4. Typical display after the commands 2 ~ oI Ma cam.ID .
BR 1-BR9
The level of imensity of a lamp connec1ed 10 a Dimmer or Wall Module may be increased from 0
(" OF F" ) 10 IO ("ON" fu ll in1 ens i1 y) . If lh e selec1ed m od u le is off a1 1he ti me of 1h e co mm and. 1h e
unit will be 1um ed on 10 f ull in1en si 1y (1 0) rega rdl ess of lh e 1rn va lu e. If the selec1ed module is on a nd
!h e in1en si 1y was red uced by a DIM comm and . 1he level wi ll be increa se d by the value of 1he UR
command. See Figure 5.
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Figure 5. Typical display after the commands z C£HITID 6R2 CtfITEID.
The llRt through RR<i commands can only be u..cd with Dimmer and Wall Modules. These command~
will not work with Appliance Module'
CLR
Tums offall modutcs in the displayed house code and remove~ the cursor. deselecting the previously
~clec r ccl cnnrrol module .
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ALL
Turn s on a ll Dimm er and Wall M od ul es in th e di splayed house code which were prcviou~ly "ol'F."
The sta tu s uf mo<lules previously on at any intensity (i.e. ON. I through 9) will not be affected. The
ALL command cannot be used witJ1 Appliance Modules.
@
To e nt er the programming mode orgo back to th e direct command mode. type (i1 (ERIEJD.
0
T ype O tEHIIID to exit from the Con troller program and go back to Level II or Model Ill BASIC. Disk
BASIC nnd/orrnsoo~. Th is command will work with Model I/Model Ill. Leve l JI computers only.
( See "Special Applications" for information on use.)
HE LP
Di sp la ys a li st of a ll unit co mm an ds. This command will work with Model I/Model Ill. Level I/ II
computers only. A li st of comm!lnds will also be displayed on these computers if an invalid command
is emered.
Programming Mode
In the programming mode. modules may be programmed to execute unit command~ at a
predetermined time. Up to 32 command lines may be entered in advance on Level I computers. up to
45 command lines on Level II computers. and up to 30 lines on the Color Computer. To enter the
programming mode type @ cmIEJD. The programming mode displ ay i~ ~ hown in Figure 6.
· This display will differ slightly on the Color Computer. The commands used in the programming
mode arc listed and defined as follows:
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Fi gure 6. Programming Mode
I (Insert Command Line)
To enter a command line 1ypc I (EHilB). A cur..or will 1hen prompl 1he entry of lime (h/J:mm) .
hou se code (A-P). unil code (1-16). and command code (o~ . oFr. DIM 1·9. llR 1·9. ALL. or ct . R). Press
CEHIE1D afler 1yping in each entry. Afler 1he la~I column has been entered. anolher cursor 1 will appear
on 1he nexl lin e. 'fypc I CEHIEID 10 add anoihcr command line. lo insert a co mmand line so mewhere
15

in th e seq uen ce o th er 1h an after the last line e ni ered, cype I line CEHIEID (where line = line number
at which th e lin e is to be in se rted ). As before, lh c c ur sor > wi ll prompt for th e com mand lin e
information.
The computer will resequence th e command lin e numbers in the form of 1,2,3 e tc. Each command in
the programming mode is exec uted in order of it s line number. After th e last lin e number is excc ut1.:J
the sequence wi ll repeat.
R line (Replace Command Line)
This command is similar to th e t line command except the new command line replaces th e line
indicated.
E line (Execute Command Line)
This comma nd changes the "NEXT LINE TO llE F.XECUTF.D' • to the line indicated by line.
D line (Delete Command Line)
Will dclcie the indicated command line.
L (List)
Type L CfilITilD to li st th e co mmand code lin es ;11 page one.
P (Page)
Type P CffiiIID to list th e next page of command code lines. To return lO the first page. type L CEHI.m>.
@
To return to the direct com mand mod e. type @ mllEJD.
16

CLEAR
Pressing~ will cancel a command line if 1hc line has nol been eompleiely typed and entered.
Note: If an l, l /i11e, D li11e. or R li11e command is e!llcred, lh e "NEXT LINETO BE EXECUTED" will be
se1 to OI. Use 1h e E line command to cha11gc the Execu tion I inc to the desired line number.
IL is important to understand that the programming mode will function only when in th e program
mode display. If you go bm;k to thi.:: direct couummd moui.::, lhc duck will kccp "licking" bu1 no
command lines wi ll be executed and the "NEXT LINE TO oE EXECUTED' ' will 1101 change.
IL is possible to e xe cute commands for approximately 18 different modules at the same time. This
number will vary. depending upon commands entered. ON, OFF, O.R and ALL execute in
approximately 0.5 seco nd s; the DIM and OR commands. 0.5 to 2 seconds, depending upon value
given. An example of three modules to be executed ai the same time is shown in Figure 7. The
program lines arc executed in numeri cal orde r. therefore. the program lines to be executed at the
same time mu st be grouped together and placed in the desired ~c quence.
You can program your control modules for several days at a lim e. (Note: In this case. tum your
display's bright11ess control all the way down. TI1is will pre\' Cnt permanent ·' shadows" from
forming on the screen.)
If you want th e same routine al the sarnc time everyday, just type in the order of commands once.
Remember that the Controlleronly understands military tim e. See example in Figure 8. This routine
will start every morning at 7:00 a.m. and end every night at IU:OO p.m. Aflcr line 06 is executed. the
next lin e to be executed will be line 01.
You can program several <lay s at a time with different routine s. An example ofa three-day cycle is
shown in Fig ur e 9. In the example. the first day starts at line 01 at 7:00 a.m. and ends at line 04 that
same day at 10:30p.m. Linc 05 starts the next dily at 6:00 p.111. and ends 1hc day at 10:00 p.m. The
third day starts at lin e 07 al 7:00 a.m. and line 08 ends the day's rou tin e at 8:00 a.m. The routine
starts over again m line 01 the next time the cloc'.k reads 07:00. 17

Figure 7. To Activate Three Modules Simultaneously
Sec Fi gure 10 for o ne more examp le of a three day cycle, but th is time no modules will be opera ted
the seco nd day. Le t's say you're going out of town the morning of the firs t day and do not want any
li ghts on un til the third ni g ht when you arrive home. Figure 10 shows h ow you would do that.
The fir st d ay sta rt s at l in e 01 and ends at lin e 03 with a ll modules off. The next lines to b1: 1:xcc ut ed
are 04 and 05. Be cau se we don't wa nt any lights on th e seco nd day. we must put in "dummy"
commands, that is. commands that don't rel.ult in any action but take up space in th e controller's
18