Adcom A723, A720 manual More about the LED tool

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CHAPTER 3

Using the RTU

This completes the installation of your addIT RTU. If one of the I/O connectors is left unused, use the cap specially provided to protect it against moisture and dust. Be sure to make a note of the follow- ing information because you’ll need it when you configure the device in the software:

•Serial number for each RTU

•Type of sensors connected to each RTU

More about the LED tool

The LED tool allows you to rapidly check the status of an addIT RTU. After you insert the LED tool into the POWER connector, the unit waits up to two seconds and then sends a broadcast frame. If a nearby listening station or receiver decodes the frame, it will answer back—this may take up to 10 seconds. When an answer is received, the LED tool lights up for about 4 seconds. After another few seconds, the LED lights up one or more times, depending on the number of stations/receivers that answered to its broadcast frame.

Note: addIT RTUs do not respond to a broadcast frame, only remote stations (A730MD) and base stations (A730SD or A720B).

In addition, the LED always blinks briefly at 0.5 second intervals to indicate that the unit is alive and the internal battery has enough energy to operate. If the blinking interval lengthens to 2 seconds, the battery has become undercharged (that is, under 5.6 volts but over 5.2 volts)—this is called the misery state. In this state, an addIT RTU reduces its activities to a minimum. The radio unit is switched off, the sensor sampling ceases, and no data is stored in the internal memory. Only the internal real-time clock is maintained and the power management functions are performed.

If the battery level drops below 5.2 volts, the system switches com- pletely off, effectively decoupling itself from the battery in order to protect it. In this case the LED tool stays permanently off. An addIT RTU in such a situation will restart only after connecting it to an external power supply (even a solar panel under low light condi- tions).

Note: New addIT RTUs are delivered with their internal batteries unformatted, meaning they are completely discharged, and you should install them only on sunny days. The battery will

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Contents ADC N ADC N Contents Contents Introduction What are addIT devices?Installation issues Conventions ItalicsChapter Using the Base Station Opening the packagesInstalling the base station Installing the receiverInstalling the power supply AddIT Power SupplyReplacing the fuse Configuring the softwareUsing the RTU Installing the RTU Shows an addIT RTUShows what a typical RTU field installation looks like More about the LED tool Maintaining and servicing the RTU RTU batteryConfiguring an addIT RTU in the addVANTAGE software Changing the battery Chapter Chapter Performing Advanced Functions Receiver connector Understanding connectorsDevice series RTU connectors Pins on an I/O Connector Top ViewAddIT RTU Power Connector Top View Configuring the devicesSerial communication protocol General format of a commandGeneral format of an answer Series 1 devices Using terminal commandsSET Ownid nnnn SET Ownid SET PMP bl bhSET PMP 63 SET Slot 3600SET Freq 467112500 SET Freq freq stepSET Rssi value Querying the actual configuration parameters SET RssiSeries 2 and 3 devices CmdsFreq Freq 433925000Freq Freq 433925000 25000Slot PMP PMP 65 72 193 cm193 CM 1 SSTDEV ReplDEL Repl 5667DEL Data 5666 12/12/1998 Data b1 b2 b3 ... bnDd mm yyyy hh mm ss si ft d1 d2 ... dn dd mm yyyy Dn csFrame 38 description Data 6367 30/4/1999 Frame 39 descriptionImme DataRoute Fdev InfoTemp = internalTem p 146 900 Info 255 0 18/4/1999 21511 1.3 0 0 0 91Anlg Code Description Parameters Returns Sampling methods are defined by three bits, as follows Return result depends on the control byte see table. However A720B and A723, but see also the comments in Remote on Performing Advanced Functions Command Code Definitions Port 193 RX 6789 Port 7/5/1999 183422193 TX 6789 B #234 BA#7851 BA 15190 BBlst 30/8/2001 160341 VERVER 1.3 VER 2.0Notifications Returned errors list Command line interpreterDevice descriptors and storage handler Real time clockNotifications Chapter Appendix. Specifications Parameter Min Typ Max UnitTransmitter all measurements made on a 50 Ω resistive load Chapter Chapter Index INFO, 41 OWNID, 26 PMP PMP What a base station contains Xmit Credits Credits and ColophonColophon
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