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When
eitherlthe DC112 or RF modem options
are
specifie{
the
time limit on the call (without
a
correct respdnse) specified in Parameter 3
is
timed
from
tile
start of
the instruction and must
include
the
daling
time.
lf
the
correct response is not received within the
time
specified in Parameter
3,
the 21X will
continue
to
rtake calls.
The
2'1X
will repeat the
calls
at
the
f{st
intervalspecified by Parameter
4
for
the number of retries specified in Parameter
5, after
whiclh
the
calls will be attempted at the
slow interval specified in Parameter
6.
Parameter 4 and 6 are timed from
the start of
the Instruction. The actualdelay between
retries
for bdth the fast and slow attempts has
a
random
factor built in, which is added as
an
offset to the delay
specified. The
random
factor
prevents calls
f
rom
ditferent stations from
occurring at
the same
time.
This otfset will
range betwepn 0 and
one half
of
the
delay
specified. The
resolution of the timer for
these
delays
is
thelexecution interval
of
the
table
in
which
the aldrm call is initiated.
Parameter
21
specifies
which user flag (1-8)
is
to
be used as
the interrupt disable
flag.
lf
this flag
is
set high, lhstruction 97
will not initiate
an
alarm
call.
lf
the
21X is
in
the process
of
trying
to
get throuQh
with an alarm call, setting the
interrupt
dis{ble flag
high will abort
further
attempts. lrFtruction
97 sets this
flag high when
an alarm calf
has received the correct response.
Instruction
9[
does not set the flag low; the flag
will remain fiigh until set low
by
the program or
external confrmand. When the
flag is set
low,
Instruction
97 is reinitialized.
I
Instruction
97 is unique in having
a
variable
number of
pBrameters. Parameter 9
is
the
number of
stations, if any, in a RF link to the
base stationp
A non-zero entry (N) for
Parameter
9
will result in N parameters,
numbered
10
to N+9,
in
which
the RF station
lDs
are
keyed. The
RF
station lDs are the lDs
of
the RF Modems
in
the path from the initiating
datalogger tp
the base
station.
This excludes
the lD of thd initiating datalogger's RF Modem.
Parameter 10+N
(10
if
0 RF stations are
specified)
is
the number of digits,
if
any,
in
the
phone
num$er. There
are
then as many
additional pf,rameters as the number of digits
entered.
Tle
phone number
is
entered
1
digit
per parameler.
SECTION
12.
PROGRAM CONTROL INSTRUCTIONS
lf
the
call
is
to go through a RF link to a phone,
then
the RF Modem
is
specified in Parameter
1.
A RF Modem must be used between the
DCSS
and
the phone
line.
See
the PC208
manualfor
additional interfacing notes.
When
the DC112 Modem (Hayes compatible
commands) is specified, the following
commands are sent to the modem before the
phone
number:
ATV0, ATST=180, and ATDT.
The
first command causes the modem to
respond
with digits rather than
words. The
second command causes
the modem to wait for
the
carrier
180
seconds after calling or
answering. The third command causes the
Hayes to dial
the number that follows the
command in "Touch
Tones". The
21X
will not
accept
the line feed found in some Hayes
"compatible" modems.
PAR.
DATA
NO.
TYPE
DESCFIIP:FION
01: 2
Modem option and
baud rate
code. The
left digit specifies
the
modem being used and
the
right,
the baud
rate.
Modem
Baud Rate
0-RFModem
0-
300
1
- Direct
2 - DC112
1
-
1200
2
-
9600
3
-76,800
2
Interrupt disable
flag
(0-B)
4
Time limit on call,
1
sec. units
4
Delay between
fast retries,
1
sec. units
Number
of retries at fast rate
Delay between
slow retries,
1
min. units
Input location
to store no.
of
tries
lD
to send
Number
of RF Stations
(N)
Station lDs
Number
of Digits (D)in phone
number
Telephone number by single
digits
02:
03:
o4:
05:
06:
07:
08:
09:
10
to
N+9:
10+N:
2
4
4
4
2
4
2
N+11
to
D+N
+10
2
12-7
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