In-Situ Aqua TROLL 100 and 200 Operators Manual - Manual (Page 78)

Page 78 Aqua TROLL Operator’s Manual
Power Connections
The red wire provides power for all Aqua TROLL communication
modes. Analog output is disabled by default. However, the 4-20
mA current loop output can be continuous in Modbus or SDI-12
mode as long as Modbus device register 49507 is set to 1. This
can be done with a connection in Win-Situ by selecting the
Device Setup tab, Analog Setup button, and enabling analog
output.
Communications
The device automatically switches between Modbus and
SDI-12 modes depending on which of the two interfaces has
activity. Modbus and SDI-12 cannot be used at the same time —
whichever one is currently in use will block communication on
the other.
Using Win-Situ Software
Win-Situ provides options for configuring analog/SDI-12
communications (Setup tab) and Modbus communications
(File menu > Settings). In addition, the Aqua TROLL Instrument
is capable of internal logging (programmed in Win-Situ) while
participating in a Modbus, SDI-12, or analog network. However,
Win-Situ cannot communicate with the Aqua TROLL Instrument
while it is trans mitting Modbus, SDI-12, or analog data, and
conversely, the instrument cannot receive or respond to Modbus,
SDI-12, or analog commands while connected to a PC serial port.
Redundant Logging Feature
• If the PLC or recorder somehow loses data, the Aqua TROLL
data can be retrieved using Win-Situ.
Section 8: Analog, SDI-12, Modbus