OTT Hydrolab DS5, User Manual

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58
External Communications
Table 4 is a summary of the SDI-12 user commands supported by the multiprobe. For
more details on correct use, consult the SDI-12 V1.2 specification.
B.2 Connection to an External Device
The Series 5 Multiprobe can communicate with an external device using an RS232,
RS485, or SDI-12 interface. The RS232 interface is always available. The Series 5
Multiprobe must be programmed for communication via an RS485 or SDI-12 interface.
Two cables are available for external communication: a 6-pin marine to DB-9 cable
(Cat. No. 015xxx), and a DB-9 to external device cable (Cat. No. 013510) for SDI-12 or
RS485 interfaces (
Figure 20 ). Wiring diagrams for these cables are shown in Figure 22
and Figure 23 . Wiring for the 6-pin Sonde connector is shown in Figure 21 . Wiring to the
external device is detailed in Table 5 .
Figure 20 Communication Cables for the DS5, DS5X, and MS5 Water Quality Sondes
Table 4 SDI-12 Commands
Command 1 Response Description
a! a<crlf> Address Acknowledge
aI!
aXXHydrolab YYYYYYZZZZserialnumber
<crlf>
Identify
XX: SDI–12 Support Version
YYYYYY: Instrument ID
ZZZZ: Software Version
aAb! b<crlf> Change address from a to b
aM! adddn<crlf> Measure n values in ddd seconds
aDx! aSvalueSvalue...<crlf> Report Data
aRx! aSvalueSvalue...<crlf> Report Continuous Data
aC! adddnn<crlf> Concurrent Measure: nn values in ddd seconds
aXC! aXC<crlf> Initiate a cleaning cycle in units equipped with a wiper
aX1! aX1<crlf> Enable Continuous Mode
aX0! aX0<crlf> Disable Continuous Mode
aXSS1! aXSS1<crlf> Circulator On
aXSS0! aXSS0<crlf> Circulator Off
1
The 'a' used in the SDI-12 commands is the SDI-12 address. The Transmitter's factory default SDI-12 address is '0'.
1.
Cable, 6-pin marine to DB-9 (Cat. No. 015XXX)
4.
Label, wire connections
2.
Connection to DS5, DS5X or MS5
5.
Connections to external device
3.
Cable for SDI-12/RS485 (Cat. No. 013510)
6.
Connection to power
1 3
4
5
6
2