A724 addSWITCH User Manual SMART WIRELESS SOLUTIONS
Proprietary Notice: The Adcon logo, addSWITCH™, addIT™, addWAVE™, addVANTAGE™, addVANTAGE Professional™ and AgroExpert™ are trademarks or registered trademarks of Adcon Telemetry. All other registered names used throughout this publication are trademarks of their respective owners. Neither the whole nor any part of the information contained in this publication may be reproduced in any material form except with the prior written permission of Adcon Telemetry.
CHAPTER About the addSWITCH A724 ______________________________________________5 Conventions _____________________________________________________________6 Opening the packages ____________________________________________________7 Installing the RTU ________________________________________________________8 Field Installation_______________________________________________________9 More about the LED tool _____________________________________________ 10 Configuring an addSWITCH RTU in the addVANTAGE software
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CHAPTER 1 About the A724 addSWITCH Chapter 1. Introduction This manual explains the hardware aspects of Adcon’s A724 addSWITCH remote telemetry units, including installation issues and certain parameter configurations. The manual is divided as follows: • "Introduction," which gives some general information and document conventions. • "Using the A724 RTU," which details the installation and use of the remote telemetry unit. • "Specifications," which describes operating parameters for the devices.
CHAPTER 1 Introduction The A724 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. Conventions Certain conventions apply in this document.
Chapter 2. Using the addSWITCH The A724 addSWITCH 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 A724 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 addSWITCH RTU package contains the A724 RTU, an antenna, and a ring clamp.
CHAPTER 2 Using the addSWITCH Figure 1 shows the front view of an addSWITCH RTU. TM Gore Prevent To Valve Connector Counter Solar Input Panel Figure 1. addSWITCH RTU Note: 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 the RTU can communicate is 1 km (.6 miles).
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 addSWITCH 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 addSWITCH RTU in the field: 1.
CHAPTER 2 Using the addSWITCH Note: The solar panel can be mounted under or behind the addSWITCH RTU, but be sure that the RTU does not shadow the panel. 6. Fasten the addSWITCH RTU to the top of the rod using another ring 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 tightly, you could damage the plugs. 7.
CHAPTER 2 Maintaining and servicing the RTU 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 completely off, effectively decoupling itself from the battery in order to protect it. In this case the LED tool stays permanently off.
CHAPTER 2 Using the addSWITCH • The channel has moderate radio activity, with requests every 15 minutes. • The counters are stored in the internal memory every 15 minutes. • No more then 40 valve activations per day (12V Type). Table 1 shows the addSWITCH devices’ expected operation time on a fully charged battery under various conditions.. Table 1. addSWITCH Device Operation Time Radio Activity Valve Actions Average Consumption (mA) Estimated Operation (days) No none 0.
CHAPTER 2 Maintaining and servicing the RTU Figure 3. Removing the addSWITCH 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. Unplugging the PCB Connector 3. Unscrew the two screws of the metal cover that holds the battery pack in place, then remove the cover. Figure 5 shows the A724 battery pack inside the RTU.
CHAPTER 2 Using the addSWITCH Figure 5. A724 Battery Pack 4. Remove the battery pack and replace it with a new one (obtainable from Adcon). 5. Replace the metal cover and screw the two screws back in. 6. Insert the battery plug into the PCB connector. 7. Mount the lid back, taking care that the rubber gasket sealing the box is not out of place. WARNING Be sure to mount the rubber gasket properly, so that the unit’s IP65 environmental protection is not affected.
Chapter 3. Performing Advanced Functions With the appropriate knowledge, you can configure the addSWITCH devices in the field by using a hyperterminal window. To configure the RTU, you will need a special serial cable adapter (not supplied, available from your Adcon distributor). CAUTION Do not try to configure your addSWITCH devices if you are not sure what to do—the unit may not communicate with the remote measuring station or function with the addVANTAGE software.
CHAPTER 3 Performing Advanced Functions The RTU connector The addSWITCH RTU uses a non-standard 7-pin sensor I/O connector (model Binder 702 and 712 series or equivalent). The connector contains two pulse counter inputs (. Figure 6 illustrates the individual pins of an I/O connector.) SBAT 1 7 CNT1 2 6 5 4 3 CNT0 GND Figure 6. Pins on the I/O Connector (Top View) The POWER Connector The RTU also has a POWER connector, which allows for: • External supply (battery or any DC source from 5.
CHAPTER 3 The Valve Connector You might want to use the POWER connector with something other than the standard configuration. For example, if you want to connect an external battery to the RTU, disconnect the internal battery and use the configuration shown in Figure 8. 5 Battery (5.6 to 10 Volt) + 4 3 1 2 Short - Figure 8.
CHAPTER 3 Performing Advanced Functions The A724 comes with a 1m cable with flying ends. A standard cable clamp can be used to connect the solenoid. It is up to the user to protect this cable clamp for outdoor usage. Sol1 white SolCom Sol2 1 4 2 3 brown yellow SolCom green Figure 11. The Valve Connector Connect the positive terminal (commonly red) of the first valve to the Sol1 pin and the negative (commonly black) terminal to the SolCom pin (1-2).
CHAPTER 3 Serial communication protocol 2. Select the appropriate serial port and click OK. 3. Configure your terminal as follows: • 19200 baud • 1 stop bit • 8 data bits • No parity • No protocol (neither hardware nor software) 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, as strings.
CHAPTER 3 Performing Advanced Functions for information (the GET version of a command). If you type parameters, you are issuing the SET version of a command and are setting the command to the parameters you typed. General format of an answer The answers have the following format: ID Command Result1 Result2 ... ResultN ErrResult # • 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.
CHAPTER 3 Using terminal commands Note: You can type uppercase or lowercase characters because the commands are not case sensitive. CMDS DESCRIPTION Returns a list of supported commands. PARAMETERS None. RETURNS A list of strings separated by spaces. REMARKS GET only. 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.
CHAPTER 3 Performing Advanced Functions PARAMETERS The operating frequency and step (Hz), or none in the GET version. RETURNS The actual frequency and step, in Hz. REMARKS GET/SET. REMOTE Yes, SET only. EXAMPLE FREQ 433925000 25000 15535 FREQ 0 # 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.
CHAPTER 3 Using terminal commands RETURNS The node ID. REMARKS GET/SET. REMOTE Yes, SET only. EXAMPLE ID 4557 15535 ID 0 # 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).
CHAPTER 3 Performing Advanced Functions PARAMETERS The lower (switch on) and the higher limit (switch off), both in volts x 10. Standard Values are 65 (for 6.5 Volts) for switch on and 72 (for 7.2 Volts) for switch off (for a standard 6.2 Volt NiCd or NiMH battery). From these values, other thresholds are internally computed. RETURNS The lower (switch on) and the higher limit (switch off), both in volts x 10. REMARKS GET/SET. REMOTE Yes, SET only.
CHAPTER 3 Using terminal commands • dd mm yyyy is the date • hh mm ss is the time • si is the size of the frame • ft is the frame type (39 for the A724) • 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 A724 devices always respond with a type 39 data frame. The composition of the data block of such a frame (the values marked as d1, d2...
CHAPTER 3 Performing Advanced Functions 9999 DATA 9999 30/9/1999 14:50:00 9999 DATA 30 9 1999 14 54 55 21 37 255 255 77 0 0 0 0 89 156 126 20 0 0 0 0 0 0 0 0 0 3197 0 # 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.
CHAPTER 3 Using terminal commands • 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.
CHAPTER 3 Performing Advanced Functions (charge/discharge).
CHAPTER 3 Using terminal commands EXAMPLE INFO 15535 INFO 255 0 18/4/1999 21:5:11 1.3 0 0 0 91 72 40 1:46 58 65 72 3 900 15 175 0 # • The Command Code specifies the operation that will be applied to the selected port. They are explained in Table 2. 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.
CHAPTER 3 Performing Advanced Functions 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.
CHAPTER 3 Commands for controlling the valves 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 # Commands for controlling the valves Switching the valves The valves can be controlled by the following commands: Table 2.
CHAPTER 3 Performing Advanced Functions Table 3.
CHAPTER 3 Returned errors list Table 4.
CHAPTER 3 Performing Advanced Functions • 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 nonexistent device) • 11 — device already exists • 12 — reserved • 13 — no more space for descriptors (too m
CHAPTER 3 Returned errors list • 38 — general modem error 35
CHAPTER 3 Performing Advanced Functions
Appendix. Specifications The addSWITCH A724 was intended to fulfill 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 5 shows the main operational parameters of the A724. Table 5. 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.
Table 5. 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 15 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.
CHAPTER e. A latching solenoid is compatible with the addSWITCH A724 output signals, when following requirements are fulfilled: 5-15V operating voltage (programmable), 2 wire polarity reversal type and activation energy is equivalent to the charge of a 4700µF capacitor.
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