Contact Signal
Line
Contact
Signal Line
1
DI01
13
DI05
2 DI02
14
D106
3
DI03
15
DI07
4
DI04
16 DI08
5
EOI
(24)
17 REN(24)
6
DAV
18
Gnd (6)
7
NRFD
19
Gnd(7)
8
NDAC
20 Gnd (8)
9
IFC
21 Gnd(9)
10 SRQ 22 Gnd
(10)
11
ATN
23 Gnd
(11)
12 SHIELD
24 Gnd
(LOGIC)
Note: Gnd (n) refers to the signal ground return of the
referenced contact.
EOI
and
REN
return on contact 24.
When addressed
as
a
TALKER,
the interface outputs gain and
reset
set-
tings, front panel settings (including Remote/Local status),
set
point and
display temperature in the form of five string variables. After each one of
the variables
is
output, delimiters DELM1 and DELM2
are
transmitted. After
the fifth variable, the
last
delimiter has the
EOI
line
set
for end.
NOTE:
In programming for an input from the
DRC8-IEEE
interface five
string
variables must be used
(or
read into the computer) or the interface
will
hang up, waiting to output
all
of the data. In outputting data to an
array, the array must have enough elements to allow the input of
all
five
variables from the
DRC8-IEEE
interface (in this
case
the number of elements
is
27). Since there
are
five
sets
of delimiters output, and most computers
use these delimiters to terminate string variables, the need for five string
variables
arises.
An
example of
a
transmission
is
as
follows:
FUNCTION
FORMAT
FOR
DATA
FORMAT LIMITS
(X)
Gain
X(DELM1) (DELM2)
0-9,
A-F
Reset
X(DELM1) (DELM2)
0-9,
A-F
Front Panel
XXX(DELM1) (DELM2)
0-9,
A-F
Set Point
XXX.X(DELM1)
(DELM2) numerics only
Temperature XXXX.XX(DELMl) (DELM2) numerics only
Figure
3.3
DRC-84C-IEEE Panel Layout
-28-
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