Digital PDFs

XX-613C6-7D

May 1972

4 pages

Original

1.0MB

Document:	CRT-14 Control Relay Translator Brochure
Order Number:	XX-613C6-7D
Revision:
Pages:	4
Original Filename:	http://bitsavers.org/pdf/dec/pdp14/CRT-14_Control_Relay_Translator_Brochure_1972.pdf

OCR Text

CONTROL RELAY TRANSLATOR

INDUSTRIAL CONTROL PRODUCTS

412
+--[

402

8001 002

8002 001

]--[ / ]--------+---[ / ]------------------+---[

(106 0(14 001
+--[ / ]--[ ]--[ / ]---+

777

422 !

]--[ / ]---(

)-+

+--[ ]-------------+
+
003 174 171 172 J71 170 J67 J66
+--[ ]--[ ]--[ ]--[ ]--[ ]--[ ]--[ ]--[ ]---+
004 177
800J 401 777
+--[I]--[
]-------------+---[ ]--[ ]--------+
407
8004 174
+--[ ]--------+---[ ]---+

+--[

]--[

+
+

]---+

001
+--[

8001

002 020 021
8002 012
+--[ ]--[ ]--[ ]-----------------------+---[ ]---+
003
8001 011
+--[ ]-----------------------+---[ ]---+
004
8004 010
+--[ ]-------------+---[ ]---+
(105 8(105 (1~37
+--[

415 !

]-------------------------------------------+---------( )-+

)---+---[

]---+

+
+
+
+

006
+--[ ]---+

(112
+--[

]-------------------------------------------+---------( )-+
+
+--[ ]-------------------------------------------+
01:?.

014

+--[

8002 016

]-----------------------+---[

015

8001 021

8005 020

]---+---[

]---+

8004 021
]---+

+
(117
+--[ ]---------------------------------+

+--[

]---+---[

022
+--[ ]---+

]---+---[

+
020
+--[ ]-------------+

Programmable controllers have become widely used and
accepted in industry. As a result two basic methods have
developed for expressing the control sequence- boolean
equations and ladder diagrams. Digital Equipment
Corporation 's aim is to give the user the ability to
choose either method for implementing the PDP-14
Programmable Controller. The computer aided software
provided by Digital Equipment Corporation for use in
developing PDP- 14 programs in boolean equations is
well known . Digital now provides a new technique for
PDP- 14 program preparation . This development is
known as CRT- 14.
CRT- 14 allows the user to program a PDP- 14 from
ladder diagrams. The control engineer merely enters
information into a CRT terminal or Teletype keyboard
using familiar relay symbology. CRT- 14 provides the
user with the ability to completely edit his program ,
display the results, and generate hard copy of the
program in ladder diagram form . Once the user has
debugged his program , CRT- 14 provides a tape from
which the PDP- 14 Programmable Controller memory is
made. It's that easy.
CRT 14 F atures
1. Uses ladder diagrams to develop PDP-14 program .
2. Provides visual display of control circuits.
3. Provides hard-copy documentation of complete
program in ladder diagram form .
4. Complete editing capability included .
5. Visual verification of changes as they are made.
6 . Run equipment on -line before final memory
is prepared .
7. Provides the tape from which memory is made .
8 . No machine language required to program .
9. Operates on Teletype and/ or CRT terminal with
any PDP- 8 family computer.
10. Handles up to 255 outputs.
11 . Maximum of 110 input contacts , output contacts,
and branch point combinations per output.
12. Provided free of charge with PDP-14 system .
Design Rules
1. One output circuit may contain up to 10 lines, each
line containing a combination of 11 input contacts ,
output contacts and branch points.
2. The same contact may be used in as many circuits
as necessary.
3. All branch paths must return to L 1 (AC line or
DC Supply) .
4. All branch points (origin of a branch) must
be numbered.
5. All inputs wired to PDP- 14 terminals are numbered
0- 377 octal (no eight's or nine's) . All outputs wired
to PDP- 14 terminals are numbered 400- 777 octal
(no eight's or nine's) .

PROGRAMMING WITH CRT- 14
LADDER
DIAGRAM

WIRE TE RMINA L
ASSIGNMENTS

NUMBER BRANCH
PO INTS

ENTRY OF
LADDER DIAGRAM

INPUTS
LS,

IC•)-

TER MINAL #

LS,
LS,

OUTPUTS
1CR
2CR
3CR

TE RMINA L U
401
402
403

''"

YOU TYPE : DESCRIPTION OF ITEM
L1
(Reference AC line or DC supply)
- H-- 1
(N/O input #1)
B2
(Branch point 2)
L1
(Reference AC line or DC supply)
- 0- 401
(N/ O contact #401)
B2
(Branch point 2)
- H- 2
(N/ O input #2)
---l 1- 402
(N/O output #402)
B1
(Branch point 1)
L1
(Reference AC line or DC supply)
--jf- 403
(N/C output #403)
---1 1-3
(N/Oinput#3)
B1
(Branch point 1)
-( )-- 401
(Output driver401 - end of circuit)
)
(Carriage return)
(Display complete
ladder diagram)

KEYBOARD SYMBOLS

SYMBOL

L1
B
-I I--#--{)-

REPRESENTS
Ltn e 1 (AC line or DC supply )
Bran ch Point
Normally open contac t
Normally closed c onta ct
Output dri ve r (e nd of c irc uit )

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