Xylem H-4191 User Manual

D E S I G N A N A L Y S I S A S S O C I A T E S , I N C . 75 West 100 South, Logan, Utah 84321 Phone: (435) 753-

1-8 Operation H-4191

Chapter 2SDI-12 Command and Response ProtocolH-4191 SDI-12 Command and Response Protocol 2-12.0 SDI-12 Command and Response ProtocolThis is a brie

2-2 SDI-12 Command and Response Protocol H-41912.1 Measure CommandThe Measure Command caus

H-4191 SDI-12 Command and Response Protocol 2-32.2 Concurrent Measurement CommandThis is a new command for the Version 1.2 SDI-12 Specification. A

2-4 SDI-12 Command and Response Protocol H-41912.3 Send Data CommandThe Send Data command

H-4191 SDI-12 Command and Response Protocol 2-52.4 Continuous MeasurementsThis is a new command for the Version 1.2 SDI-12 Specification. Sensors

2-6 SDI-12 Command and Response Protocol H-41912.6 Initiate Verify CommandThe Verify Comma

H-4191 SDI-12 Command and Response Protocol 2-72.7 Send Identification CommandThe Send Identification Command responds with sensor vendor, model,

2-8 SDI-12 Command and Response Protocol H-41912.8 Change Sensor Address CommandThe Change

H-4191 SDI-12 Command and Response Protocol 2-92.9 Extended Read Flow_Mode and Write Flow_ModeThe RS-232 port of the H-4191 supports optional RTS/

D E S I G N A N A L Y S I S A S S O C I A T E S , I N C . 75 West 100 South, Logan, Utah 84321 Phone: (435) 753-

2-10 SDI-12 Command and Response Protocol H-4191

Appendix ASpecificationsH-4191 Specifications A-1RS-232 PortType: Asynchronous, 9600 baud, 8-bit, noparity (fixed)Flow Control: RTS/CTS (optional)Com

Chapter 1OperationH-4191 Operation 1-11.0 IntroductionThe WATERLOG® H-4191 is a RS-232 to SDI-12 gateway (interface) module. When connectedto a p

1-2 Operation H-4191Figure 4 Monitor a data recorderFigure 3 Interface between a PLC andtwo SDI-12 Sensors1.1 ApplicationsFigure 1 shows a monito

H-4191 Operation 1-31.2.1 CommandsThe RS-232 host interface is fixed at 9600 baud. The H-4191 inputs SDI-12 commands (ASCIIcharacters) from the ho

1-4 Operation H-41911.3 Making ConnectionsConnect the RS-232 port of the H-4191 to the serial port of your personal computer or other hostdevice wi

H-4191 Operation 1-51.4 Testing the InterfaceYou can test the H-4191 with a simple RS-232 terminal or computer using a terminal programsuch as Xta

1-6 Operation H-4191When monitoring traffic between a data recorder and its SDI-12 sensors, the display maysometimes have spurious characters which

H-4191 Operation 1-7process the service request. When the service request actually arrives, the keep-awake timer iszeroed. While the keep-awake ti