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6842 GPS Slim Line System - V09.01
hopf
Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: +49 (0)2351 9386-86 • Fax: +49 (0)2351 9386-93 • Internet: http://www.hopf.com • E-Mail: [email protected]
5.3.12 Data String ALOHA
The ALOAH data string refers to the data string IBM 9037 Sysplex Timer. All settings like
transmission parameters and points of transmission can be set freely.
5.3.12.1 Specified Settings
Automatic:
no
Required:
no
Blocked:
Except for the following points all settings are possible:
•
CR
and
LF
can't be swapped
•
the output of the last character (
LF
) is not possible at the
second change
5.3.12.2 Structure
Character No.
Meaning
Hex-Value
1
SOH (start of header)
$02
2
hundreds current day of the year
$30-33
3 tens
current
year
$30-39
4 unit
current
year
$30-39
5 ":"
colon
$3A
6 tens
hour
$30-32
7 unit
hour
$30-39
8 ":"
colon
$3A
9 tens
minute
$30-35
10 unit
minute
$30-39
11 ":"
colon
$3A
12 tens
second
$30-35
13 unit
second
$30-39
14 Quality
Identifier
$20, 41, 42, 43, 58
15
CR (carriage return)
$0D
16
LF (line feed)
$0A
5.3.12.3 Status
Character number 14 informs about the synchronisation status of the clock. Possible values
and their meaning are listed below.
"?" = question mark =
no radio controlled time
" " = space
=
radio controlled time at hand
"A" =
Hex 41
=
crystal operation for more than 20 minutes
"B"
=
Hex 42
=
crystal operation for more than 41 minutes
"C"
=
Hex 43
=
crystal operation for more than 416 minutes
"X" =
Hex 58
=
crystal operation for more than 4160 minutes
5.3.12.4 Example
(SOH)050:12:34:56 _ (CR) (LF)
( _ ) = Space
•
It is 12:34:56 o'clock
•
radio operation
•
50th day of the year
