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A725 addSDI

User Manual

SMART WIRELESS SOLUTIONS

Summary of content (43 pages)

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A725 addSDI User Manual SMART WIRELESS SOLUTIONS
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ADC O N T E L E M E T R Y ADCON TELEMETRY GMBH INKUSTRASSE 24 A-3400 KLOSTERNEUBURG A U S T R I A TEL: +43 | 2243 | 38280-0 FAX: +43 | 2243 | 38280-6 http://www.adcon.at ADCON INTERNATIONAL INC 2050 LYNDELL TERRACE S U I T E 1 2 0 C A - 9 5 6 1 6 D AV I S , U S A TEL: +1 | 530 | 753-1458 FAX: +1 | 530 | 753-1054 http://www.adcon.at ADCON AUSTRALIA PTY. LTD. ENFIELD PLAZA SA 5058 P O B O X 6 0 5 ADELAIDE AUSTRALIA TEL: +61 | 8 | 8260-4682 FAX: +61 | 8 | 8260-4685 http://www.adcon.
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CHAPTER About the A725 addSDI___________________________________________________3 Conventions _____________________________________________________________4 Opening the packages ____________________________________________________5 Installing the RTU ________________________________________________________6 Field Installation_______________________________________________________7 More about the LED tool _______________________________________________8 Configuring an addSDI RTU in the addVANTAGE software__
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2 CHAPTER
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CHAPTER 1 About the A725 addSDI Chapter 1. Introduction This manual explains the hardware aspects of Adcon’s A725 addSDI Remote Telemetry Units, including installation issues and certain parameter configurations. The manual is divided as follows: • "Introduction," which contains some general information and document conventions. • "Using the A725 RTU," which details the installation and use of the Remote Telemetry Unit. • "Specifications," which describes operating parameters for the devices.
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4 CHAPTER 1 Introduction a minimum voltage of 5.6V. This is lower than the official SDI-12 minimum operating voltage. The A725 is a ruggedized unit, complying with the IP65 environmental protection class (NEMA 4). It can easily be installed and it integrates perfectly into an Adcon A733 network. Depending on the terrain, it assures a reliable wireless connection to an A733 series device to distances up to 1000 meters, under favorable conditions even more.
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5 Chapter 2. Using the addSDI The A725 addSDI Remote Telemetry Unit (RTU) is part of the A7xx series. For testing purposes, you should have an A840 Telemetry Gateway installed before you install the A725 RTU. For information about installing the A840, refer to the Base Station, Telemetry Gateway A840 and Wireless Modem A440 User Guide. Opening the packages The addSDI RTU package contains the A725 RTU, an antenna, and a pipe clamp.
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6 CHAPTER 2 Using the addSDI Figure 1 shows the front view of an addSDI RTU. TM Gore Prevent SDI-12 To Connector Solar Panel Figure 1. addSDI RTU WARNING Do not turn or manipulate the Gore Prevent element! The unit’s IP65 environmental protection may be affected. Installing the RTU The following restrictions apply: • In general the typical “line-of sight” distance over which the RTU can communicate is 1 km (.6 miles).
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CHAPTER 2 Installing the RTU • As with all wireless communication devices, the higher the transmitter is installed, the better the communication will be. Field Installation Installing addSDI RTUs in the field is a fairly simple process. You can perform a connectivity check with a LED tool. The LED tool is shown in Figure 2. Figure 2. LED Tool Note: The LED tool is a blind plug to be connected to the POWER connector. Follow these steps to install an addSDI RTU in the field: 1.
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8 CHAPTER 2 Using the addSDI Note: The solar panel can be mounted under or behind the addSDI RTU, but be sure that the RTU does not shadow the panel. 6. Fasten the addSDI RTU to the top of the mast using another pipe clamp. Adcon recommends that you perform another connectivity test, if you can, to check the positioning of the device. WARNING If you turn the fastening screws too tight, you might damage the plugs. 7.
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CHAPTER 2 Maintaining and servicing the RTU 5.6 volts but over 5.2 volts)—this is called the misery state. In this state, an addSDI 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.
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10 CHAPTER 2 Using the addSDI operate at least two weeks on a fully charged battery under the following conditions: • The channel has moderate radio activity, with requests every 15 minutes. • Sensor readings are stored in the internal memory every 15 minutes. • The sensors do not drain excessive current (neither in sleepmode nor during measurement). Table 1 shows the addSDI devices’ expected operating time on a fully charged battery under various conditions.. Table 1.
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CHAPTER 2 Maintaining and servicing the RTU Changing the battery If you have verified that the battery needs to be replaced, follow these steps to do so: 1. Open the lid by unscrewing the four screws in the corners of the addSDI RTU, then remove the lid as shown in Figure 3. Figure 3. Removing the addSDI Lid 2. The battery pack is connected to the electronics board by means of a PCB connector. Remove the battery pack’s plug from the PCB connector, as shown in Figure 4. Figure 4.
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12 CHAPTER 2 Using the addSDI 3. Unscrew the two screws of the metal cover that holds the battery pack in place, then remove the cover. Figure 5 shows the A725 battery pack inside the RTU. Figure 5. A725 Battery Pack 4. Remove the battery pack and replace it with a new one (obtainable from your Adcon dealer). 5. Put the metal cover back in place and secure it with the two screws. 6.
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13 Chapter 3. Performing Advanced Functions With the appropriate knowledge you can configure the addSDI devices in the field by using a hyperterminal window. To configure the RTU you need a special serial adapter cable (item 200.720.540; not included with the RTU; available from your Adcon distributor).
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14 CHAPTER 3 Performing Advanced Functions Understanding connectors The addSDI devices have cable attachments called connectors. The connector type determines how the device communicates with the sensors or the computer. The POWER Connector The RTU’s POWER connector, a 5-pin M9 jack, allows for: • External charge supply (either a solar panel or an AC adapter) if the internal rechargeable battery is used. (as in most cases). • External power supply (battery or any DC source from 5.
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CHAPTER 3 Understanding connectors If you want to use the internal battery with a different power supply (charger) than the ones provided by Adcon (120 or 300mA solar panels or the ACS110 charger), make sure to use the wiring as shown in Figure 8. 5 + Charger (9 to 10 Volt, 100 to 300 mA) - 4 3 1 2 Short Figure 8.
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16 CHAPTER 3 Performing Advanced Functions GND SDI−GND 5 1 SDI−Sense 2 3 4 gray SDI−DATA yellow SDI−POWER green Figure 10. The SDI-12 Connector If you do not use an SDI-12 sensor with the proper cable already mounted, but will connect it to the SDI bus through a wiring box, it is absolutely crucial to obey the following instructions: first identify the function of each of the sensors cables. Then connect them to the wiring box in exactly the folloing order: First connect SDI-GND.
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CHAPTER 3 SDI-12 Sensor Connections SDI-12 Sensor Connections Sensor powered by RTU To connect a single SDI-12 sensor, that does not have it’s own power supply, follow the wiring scheme as shown in Figure 11. SDI−GND GND 1 5 Detection Jumper SDI−Sense 2 3 4 SDI−DATA SDI−POWER gray yellow green SDI−GND SDI−DATA POWER SDI−12 SENSOR Figure 11. Single Sensor Connection, sensor is powered by the RTU Note: In this configuration, the RTU powers the SDI-12 sensor.
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18 CHAPTER 3 Performing Advanced Functions GND SDI−GND 1 5 Detection Jumper SDI−Sense 2 3 4 SDI−DATA SDI−POWER green gray yellow SDI−GND SDI−DATA SDI−12 SENSOR self powered Figure 12.
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CHAPTER 3 Communicating with the RTU GND SDI−GND 5 1 Detection Jumper SDI−Sense 2 3 4 SDI−DATA SDI−POWER gray yellow green SDI−DATA SDI−GND SDI−12 SENSOR POWER SDI−GND SDI−12 SENSOR SDI−DATA self powered Figure 13. Multiple SDI-12 sensors Communicating with the RTU WARNING Please disconnect the SDI connector, when attempting to configure the A725 RTU via the A720SC serial cable. You will not be able to communicate with your A725 addSDI RTU as long as the SDI connector is plugged in.
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20 CHAPTER 3 Performing Advanced Functions 4. Select OK to open the terminal window. 5. Press Enter to generate a response in the window. Serial communication protocol This protocol is based on a master sending commands and a node answering. The whole communication is conducted in plain ASCII strings. When exchanging numbers, they are represented in decimal format. All commands are terminated with a CR/LF combination. All responses (answers) are terminated with the # character.
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CHAPTER 3 Using terminal commands • ID is the answering device. If a command was further routed, it is the ID of the end device. The answer must always contain the ID on return. • Command is the string representing the original command. It is supplied so that a master can distinguish between the answers it is waiting for, and out-of-band notifications (which may come, for example, over the radio port of a node). As with the ID, the command name must always be supplied. • Result1 Result2 ...
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22 CHAPTER 3 Performing Advanced Functions REMOTE No. EXAMPLE CMDS 15535 CMDS CMDS ID PMP RSSI TIME FREQ SLOT DATA INFO RX TX FDEV 0 # TIME DESCRIPTION Sets/returns the real time clock. PARAMETERS The actual time, or none in the GET version. RETURNS The actual time as dd/mm/yyyy hh:mm:ss. REMARKS GET/SET. REMOTE No.
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CHAPTER 3 Using terminal commands FREQ 15535 FREQ 433925000 25000 0 # RSSI DESCRIPTION Sets/returns the Relative Signal Strength Indicator threshold at which the RF receiver must wake up. PARAMETERS The threshold value. For the A725, it can take values from 0 to 255; it is typically factory set to 42. RETURNS The instant RSSI value and the programmed threshold. REMARKS GET/SET. REMOTE No.
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24 CHAPTER 3 Performing Advanced Functions ID 4557 ID 4557 0 # SLOT CAUTION Changing these parameters may adversely affect the ability of the device to operate for extended periods under low sun shine conditions. DESCRIPTION Sets/returns the node’s sampling interval and rate. PARAMETERS The interval (60 - 65535) and rate (0 - 255).
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CHAPTER 3 Using terminal commands REMARKS GET/SET. REMOTE Yes, SET only. EXAMPLE PMP 65 72 15535 PMP 0 # PMP 15535 PMP 65 72 0 # DATA DESCRIPTION Returns data stored for a certain device. Note: This command cannot be used to retrieve data from the SDI-12 subsystem. Please see the description of the SDIDATA command therefore. PARAMETER The ID of the device for which the data is requested and the date/ time (in the standard format) the data was stored.
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26 CHAPTER 3 Performing Advanced Functions • si is the size of the frame • ft is the frame type (39 for the A725) • d1 d2 ... dn are the data values (the frame content) • cs is a 16-bit checksum obtained by summing the bytes and discarding the carries over 0xFFFF The A725 devices always responds with a type 39 data frame. The composition of the data block of such a frame (the values marked as d1, d2... dn) is depicted in Figure 14, while the digibyte is depicted in Figure 15.
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CHAPTER 3 Using terminal commands Notice that if you need to get data that is not the last (newest) slot remotely from a device, the ID must be supplied twice. If you need to get the last slot stored, you can ignore the ID and the date/time parameters: 9999 DATA 9999 DATA 13 12 2006 22 15 00 13 39 255 255 3 0 0 87 0 0 0 0 0 0 0 0 0 0 0 0 3311 0 # IMME DESCRIPTION Samples all inputs and immediately returns the sampled data. Note: This command cannot be used to get data values from the SDI-12 subsystem.
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28 CHAPTER 3 Performing Advanced Functions • 0 – 16 Kbytes (e.g. model 25128) • 1 – 32 Kbytes (e.g. model 25256) RETURNS Nothing. REMARKS SET only. REMOTE Yes, SET only. EXAMPLE FDEV 1 15535 FDEV 0 # INFO DESCRIPTION Returns various status information. PARAMETER None.
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CHAPTER 3 Using terminal commands (charge/discharge).
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30 CHAPTER 3 Performing Advanced Functions EXAMPLE INFO 15535 INFO 0 84 13/12/2006 20:02:29 2.10 2 0 0 85 59 0 3:52 42 65 72 12 60 1 0 # RX DESCRIPTION Switches the unit to permanent receive mode (for tuning purposes). PARAMETERS None. RETURNS Nothing. REMARKS The system stops, and exits the command only when a key is pressed. This command returns no message. REMOTE No. EXAMPLE RX 15535 RX 0 # TX DESCRIPTION Switches the unit to transmit mode (for tuning purposes).
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CHAPTER 3 Using terminal commands TX 5 15535 TX 0 # B DESCRIPTION Sends a broadcast frame. PARAMETERS None. RETURNS A data block. REMARKS After the device has sent the broadcast frame, it will listen for answers. All valid answers will be listed with their IDs. REMOTE Yes. A device getting this frame would have to wait for a random time (2 to 10 seconds) before performing the actual broadcast; if no terminal is active, then no results will be listed.
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32 CHAPTER 3 Performing Advanced Functions VER DESCRIPTION Requests the firmware version of the device. PARAMETERS None. RETURNS The current version. REMARKS GET only. REMOTE No. EXAMPLE VER 15535 VER 2.14.0 0 # SDI DESCRIPTION A complex command that can be used to check the status of the SDI-12 subsystem, as well as configure it. PARAMETERS The command has a multitude of options. If issued without parameters, the GET variant is implied, i.e.
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CHAPTER 3 Using terminal commands the SDI-12 allowable characters 0..31, 127..255) are substituted with an underscore (_). The arguments are the same as in sdi - command. sdi ! resets the SDI-12 configuration. All previous entries are deleted from the configuration table. • sdi * forces a sensor discovery cycle after the next measurement cycle. The status of the operation can be checked by issuing an sdi command without arguments (the GET version). All sensors discovered will be displayed in the list.
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34 CHAPTER 3 Performing Advanced Functions REMARKS SET/GET. REMOTE Yes. EXAMPLE Initiate a “discovery“command #sdi * #sdi 35385 sdi awmvD 0 0 Discovery is pending (D). Detach A720SC Serial Cable and attach SDI-12 bus and wait for at least 1 minute; the bus will be scanned. Detach the SDI-12 bus, wait 2s and attach A720SC again.
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CHAPTER 3 Using terminal commands The date/time specifies the first slot to be retrieved that is strictly “younger” than the specified time stamp. RETURNS The data block returned will typically contain a number of data frames. The structure of a block is as follows: dd mm yyyy hh mm ss si ft rfin rfout db batt sdih sdib1 sdib2 ...
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36 CHAPTER 3 Performing Advanced Functions SDI count SDI offset SDI available SDI address SDI method SDI index SDI value #1 SDI value (floating point) SDI address SDI method SDI index SDI value #2... SDI value (floating point) SDI address SDI method SDI index SDI value #n SDI value (floating point) Figure 16. SDI-12 Data Frame, part of type 60 Frame The frame is similar to the standard DATA frame, but has the SDI sensor values appended after the battery value.
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CHAPTER 3 Returned errors list REMOTE Yes. EXAMPLE #12800 datasdi 12800 datasdi 16 5 2003 20 14 49 44 60 255 255 127 87 9 0 9 3 0 0 74.379401 3 0 1 68.117003 3 0 2 58.832397 3 0 3 51.611795 3 0 4 38.346400 3 0 5 19.800799 3 0 6 14.895999 3 0 7 3.553500 3 0 8 0.037200 2953 0 # SDA DESCRIPTION Sets/returns the maximum delay for waiting awake (i.e. out of sleep mode) for a service request of an SDI-12 sensor. This parameter is set to 30 seconds by default.
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38 CHAPTER 3 Performing Advanced Functions Command line interpreter • 1 — command not recognized (=it doesn’t exist or isn’t supported) • 2 — command line buffer overflow (input line too long) • 3 — internal error • 4 — reserved • 5 — missing or false parameters in command • 6 — operation not implemented • 7 — remote operation not allowed • 8 — Invalid IMEI checksum number Device descriptors and storage handler • 10 — device not found (attempt to perform a command on a non-existent device
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CHAPTER 3 Returned errors list • 36 — receiver busy (for example, just executing a polling series) • 37 — time stamp of a frame is too far in the future • 38 — general modem error 39
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39 Appendix. Specifications The A725 addSWITCH was built to match the specification of the ETSI 300 220, Class I, Subclasses a and b, but other national norms are similar to this (for example, the CFR 47, Part 90, Subpart J). Table 2 shows the main operational parameters of the A725. Table 2. Operational Parameters Parameter Min Typ Max Unit Common Supply 5.0 Operating Temperature Relative Humidity 10.0 V -30 +70 °C 10 99 % 2000 bps 470 MHz Frequency Stability (-20 to +60 °C) ±1.
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40 Table 2. Operational Parameters (Continued) Parameter Min Sensitivity (10 db S/N) Image Frequency Attenuation (1st IF = 45 MHz) Typ Max -105 Unit dBm 35 dB Local Oscillator Leakage 2 nW Adjacent Channel Attenuation 55 dB RSSI Dynamic 90 dB 20 mA 10 dBm Spurious Radiation (0 to 862 MHz) 2 nW Spurious Radiation (862 MHz to 3.5 GHz) 200 nW Adjacent Channel Power (12.5 kHz version) -32 dBm Adjacent Channel Power (25 kHz version) -44 dBm Occupied Bandwidth (12.