Digital PDFs

XX-80189-CA

1972

4 pages

Original

1.3MB

Document:	The PDP-14 Programmable Controller
Order Number:	XX-80189-CA
Revision:
Pages:	4
Original Filename:	http://bitsavers.org/pdf/dec/pdp14/PDP-14_Brochure_1972.pdf

OCR Text

THEPDP-14
PROGRAMMABLE
CONTROLLER
DIGITAL EQUIPMENT CORPORATION Industrial Control Products

WHAT IS THE PDP-14?
The PDP-14 is a solid-state programmable controller for
repetitive manufacturing operations. It accepts inputs
from two-state devices such as limit switches, push buttons or pressure switches and, in accordance with input
conditions and a predetermined control sequence, turns
on or off devices such as solenoids and motor starters.
To assure reliable operation. this control sequence is
stored 1n braid~-wfre Read only Memory that IS 1me_e rvious to external electrical interference.

WHY THE PDP- 14?
The PDP-14 is Truly General Purpose - It can control
almost any type of machinery.
The PDP-14 Allows Control System Standardization One basic system satisfies all control requirements. Only
the memory element changes from system to system.
The PDP-14 ls Designed For Industrial Environments-It
is mounted in a standard N EMA-12enclosureand requires
no cooling .

The PDP-14 Is Not Affected By Electrical Noise-Electrical interference is minimized by elecfromecbao1car
design techniques and a wired memory.
The PDP-14 Has No Moving Parts-It is immune to the
mechanical failures that plague electrical . mechanical
and fluid systems.
The PDP-14 ls Easy To In sta ll And Operate - No specialized knowledge of solid-state electronics or computer
programming is needed .
The PDP-14 is Easy To Maintai n- Wh en an engineer or
maintenance mechanic has become familiar with one
PDP-14 , he can repair and maintain all PDP-14 systems.
The PDP-14 ls Computer Compatible - Coupled with a
PDP-8 or PDP- 11 , the PDP-14 ca n provide interactive
computer control. monitoring , or both .

HARDWARE
Control Unit
• Tests inputs and sets outputs as instructed by memory.
• Checks on or off state of every output 50 times each
second (i n a typical application) .
• Communicateswith PDP-Sor POP-11 family computers
for monitoring and control.
Read Only Memory
• Basic controller contains 1,024 ( 1Kl 12-bit memory
words.
? • Easily alterable in the field .
il,, .11" .• Memory can be increased in increments of 1K up to
T'vv4K 12-bit words .

,}h

Interface Boxes
• Input boxes- Modular input box accepts either thirty'.
two standard 60 Hz 120 VAC or thirty-two 10-55 VDC
virt--inputs. Each POP-14 will accept a maximum of 8 boxes
(25 6 inputs).
Noise-immune K-Series modules are used for voltage
1
cond1t1oning Each input c1rcu1t is equipped with an
_{
indicator lamp Each input circuit also provides a reactive load to clean switch contacts

? •

• Output boxes - Modular output box provides either
• 15 standard 60 Hz 120 VAC or sixteen 10-250
VOC outputs. Each POP-14 will control 16 output
boxes (a total of 255 outputs). Outputs use no1seimmune K-Series modules which act as switches
turned on or off by POP-14 control. Each output circuit
is equipped with an indicator lamp. Input boxes can be
substituted for output boxes giving a total of 512 inputs.
• Storage modules- Provide 16 storage funct1ons (fl1pflop ) for counting, shifting. and other incremental
operations.

r(-

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and retentive memories

I 15V

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CONTROLLl:.D
EQUIPMENT

:.J
'0 #2

BOX

256
INPUTS

:0,

"rll

PDP -14
CONTROL
UNIT

"!"

' --

"O"
BOX

: READ
: ONLY
•MEMORY

255

BOX

OUTPUTS

"A"
BOX

Basic PDP-14 System

MEMORY DEVELOPMENT
The memory development technique of the PDP-14 is
designed for control engineers, not computer programmers. The memory aids CRT-14, SET-14, BOOL-14 and
SI M-14are program tapes written for the control engineer
and are provided with every PDP-14 system. These operate on a PDP-8 family computer and teletype and
enable the control engineer to convert his sequence of
operations into the Read Only Memory without using
computer programming techniques . The control
engineer merely uses either English statements, Boolean
equations or re lay ladder diagrams.
• CRT-14 -Allows the user to program a PDP-14 from
ladder diagrams with complete editing capability. He
can display the result and generate hard copy in ladder
diagram form . The CRT-14 provides the tape from
which the memory is made.
• SET 14 & BOOL-14 - Translate English statements
into POP-14 control statements and automatically
write all the necessary instructions. System documentation and hard copy used 1n debugging the control
sequence are also generated .
• SIM 14 -Checks out the control sequence before it
becomes operative (SIM off-line) . Enables the control
seq uence to operate the production equipment before
the memory element is finalized and inserted in the
control unit (SIM on -line) . Provides the debugged
paper tape from which the Read Only Memory is
prepared .

SELF - MAINTENANCE
• Lamps on each input and output indicate the presence
of voltage from the AC or DC field devices. This allows
quick isolation of a failure 1n either the control system
or the controlled equipment
• The 1/ 0 Interrogator Box (BT 14-A) tests the current
state of POP-14 inputs and outputs as seen by the
control unit. Allows maintenance of the POP-14 without
a computer .
DIA GNOSTIC MAINTE NANCE
Computer-based ( PDP-8 ) d1agnost1cs are provided to
completelyd1agnose input boxes. output boxes. memory ,
control unit. and accessories.