UniData Communication Systems Starlog Prologger 7001, Руководство пользователя

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5.3 SDI-12 Serial Digital Interface (optional)
The PROLOGGERs support the U.S.G.S. SDI-12 standard for serial data
interchange between the logger and intelligent instruments.
SDI-12 is implemented as an alternate use of Sense 1 (Pin 19). Up to ten
SDI-12 compatible instruments may be connected to this bus. Programming
the SDI-12 interface is supported in the STARLOG Version 3 Software.
See Appendix
D - Using the SDI-12 Interface
details on how to use the
SDI-12 Interface.
5.4 PROLOGGER Initialisation
The STARLOGGER is normally stored and delivered to you in
sleep
mode to
conserve batteries. You
must
load a scheme into the logger before it can be
used.
In normal use, the PROLOGGER will not require initialisation. If however,
the logger does not appear to scan at the correct rate, it may need
re-initialization.
Any of the following actions will (re)initialise the logger:
•
Loading a Scheme into the logger.
•
Executing the “RESET LOGGER” command in the Config List.
•
Using the ALT-I command in Diagnostics. (See the STARLOG Software
Package.)
•
Disconnecting, then re-connect the battery after a ten second delay.
WARNING: data stored in memory will be lost.
•
Adjusting and saving any of the Config Entries.
UNIDATA
30 INSTALLATION & CONNECTION
Pin 18
SYNC
Pin 14/13
CLOCK 0/1
Pin 32/31
DATA 0/1
LOGGER SCAN
20us
30us
Write Bit 0 Bit 1 Bit 2
50 us
10ms
Bit 0
Bit 1 Bit 2
Bit 7 0 (BYTE 1)
SERIAL OUT
Bit 0 Bit 7
30us
Serial Out Timing Diagram