Page | 1 Aeroqual Series 900 User Guide Contents 1. Description..................................................................................................................................... 3 1.1. S930 Components .................................................................................................................. 3 1.2. Components not supplied but required ................................................................................... 3 2. Configuration ................................................................................................................................. 3 2.1. Using the Aeroqual USB to RS485 converter ......................................................................... 3 2.2. Configuring the S930 using the PC software .......................................................................... 4 2.2.1. Changing the Port ID ....................................................................................................... 4 2.2.2. Alarms ............................................................................................................................. 4 2.2.3. Control ............................................................................................................................. 4 2.2.4. 4-20mA output scale ....................................................................................................... 5 2.2.5. Upload ............................................................................................................................. 5 2.2.6. Download ........................................................................................................................ 5 3. Operation ....................................................................................................................................... 5 3.1. Description of Outputs ............................................................................................................. 5 3.2. Operation as a Relay Controller .............................................................................................. 6 3.2.1. Procedure ........................................................................................................................ 6 3.3. Operation as a 4-20 mA transmitter ........................................................................................ 6 3.3.1. Procedure ........................................................................................................................ 7 3.4. Operation as a RS485 Transmitter ......................................................................................... 8 3.4.1. Connecting via RS485 .................................................................................................... 8 3.4.2. Network Settings ............................................................................................................. 8 4. S930 Specifications ...................................................................................................................... 9 5. Gas Measurement Guidelines ...................................................................................................... 9 6. Troubleshooting .......................................................................................................................... 10 7. Diagnostics .................................................................................................................................. 11 8. RS485 Protocol ............................................................................................................................ 11 9. Care and Maintenance ................................................................................................................ 17 9.1. Disposal / Recycling .............................................................................................................. 17 10. Appendix ...................................................................................................................................... 18 10.1. Copyright ........................................................................................................................... 18 10.2. Software License ............................................................................................................... 18 10.3. Terms and Conditions ....................................................................................................... 18 10.4. Statements of Compliance ................................................................................................ 18 Page | 2 Aeroqual Series 900 User Guide 1. Description The Aeroqual Series 930 Fixed Gas Monitor is designed to measure and control gas concentrations and to communicate to a variety of hardware systems. The monitor can operate as a relay controller with user controlled set points, a 4-20 mA gas transmitter as well as communicate via RS485 on a network. They can also connect to PC data logging and networking software to allow for real-time network capability to be set up and logged data to be stored. The software can be found at our website www.aeroqual.com. 1.1. S930 Components The following components are supplied with the S930 Fixed Gas Monitor: Series 930 base unit Temperature and Relative Humidity Sensor (Optional) Integrated display (Optional) Strobe & Siren (Optional) RS485 to USB converter for PC configuration (Optional) Please check that all these components have been supplied and contact your distributor or Aeroqual at [email protected] if any of the components are missing. Replacement sensor heads and other accessories can be purchased separately. Note: All sensor heads deteriorate over time. We recommend recalibration once a year and replacement every two years or when the “sensor aging” or “sensor failure” diagnostics appear. Sensors require more frequent maintenance if run continuously at site. 1.2. Components not supplied but required 24VDC 1A power supply for powering the Series 930 2. Configuration The Series 930 alarm and 4-20mA output scale settings can be configured via the Fixed Monitor Configuration software. The PC software can be found on our website at www.aeroqual.com. To configure the instruments by computer you will need an RS232/RS485 or USB/RS485 converter. There are many RS232/RS485 converters available on the market however only certain brands will function well with the Aeroqual products. Aeroqual can supply a USB/RS485 converter suitable for configuring the instruments. Please contact your account manager for more information or contact [email protected] 2.1. Using the Aeroqual USB to RS485 converter The USB-RS485 converter cable provides a USB to RS485 serial interface with customised end connectors. The drivers required can be downloaded for free from www.ftdichip.com. Note: Aeroqual S930 monitors communicate via 2 wire RS485 so the converter must be configured to RS485 2W. USB to RS485 wiring S930 Output GND (Black) GND Data+ (A) (Orange) RS485A Data- (B) (Yellow) RS485B Page | 3 Aeroqual Series 900 User Guide 2.2. Configuring the S930 using the PC software a. Plug in and install the USB to RS485 converter into your computer b. Wire the RS485 outputs into the instrument using table above c. Install the Aeroqual Fixed Monitor Configuration PC software d. Power up the instrument e. Run the Fixed Monitor Configuration software f. Select Unit by entering the Port ID of the instrument you wish to modify and click on "Download” to download the unit’s current values Note: All new products have a default ID of 1 g. Modify settings h. Click Upload to upload the settings to the instrument i. Click Exit 2.2.1. Changing the Port ID Click on “Port” menu and select “Change Port ID” to change ID to your requirement in the range 1 to 255. Note: If you are setting up a network please ensure each unit has a unique ID otherwise there will be conflicts and data loss. 2.2.2. Alarms High alarm and low alarm set points can be configured by entering the required activation set point on the main menu. Note: The high alarm set point must be greater than low alarm set point The low alarm trigger determines whether low alarm is activated when the concentration goes above or below the set point. The Alarms can be enabled or disabled by clicking “Enable” or “Disable” on the main menu. 2.2.3. Control The control output is triggered according to the band set by the control high and control low values. Note: Control high must be greater than control low The action of this output is designed to enable control of an external device such as an ozone generator. The control output will be "on" when the concentration is rising in the range from below control low until it hits control high when it turns off. It remains off until the concentration falls below control low. Page | 4 Aeroqual Series 900 User Guide 2.2.4. 4-20mA output scale The 4-20mA output scale sets the gas concentration scale. Each sensor head type has a default setting but the user can modify this by clicking the user define button and entering the required value that corresponds to 20mA. 2.2.5. Upload Clicking this button uploads the settings to the instrument. 2.2.6. Download Clicking this button downloads the settings from the instrument. Use this function to check the settings are correct. 3. Operation 3.1. Description of Outputs DIAG This output is designed to enable detection of sensor faults. This is normally floating but is set to GND when the sensor fails. Thus it can be considered a "switch" which is closed when the sensor fails. This can be used to activate an alarm or relay and can also be monitored with a PLC. The output is an open collector current sink. The maximum rating of the transistor output is 24VDC at 150mA. LoALM This is set to GND when low alarm is activated. It is floating at other times. Use the Configuration Program to set the Low alarm set point. The output can be used to drive an alarm relay or similar. The alarm can be set to trigger above or below the set point using the configuration software. The output is an open collector current sink. The maximum rating of the transistor output is 24VDC at 150mA. If a relay coil is connected or any other inductive load to the transistor outputs, a back EMF suppression diode must be fitted across the load. HiALM This is set to GND when high alarm is activated. It is floating at other times. Use the Configuration Program to set the Hi alarm set point. The output can be used to drive an alarm relay or similar. The output is an open collector current sink. The maximum rating of the transistor output is 24VDC at 150mA. If a relay coil is connected or any other inductive load to the transistor outputs, a back EMF suppression diode must be fitted across the load. CNTRL This is set to GND when the gas concentration is rising in the range from below the Control low set point to the Control high set point at which stage, it is set to floating. It remains floating until the concentration falls below the Control low set point at which point, it is reset to ground. Use the Configuration Program to set the Control set points. This output can be used to control, for example, a gas generator or vent in a process operation. The output is an open collector current sink. The maximum rating of the transistor output is 24VDC at 150mA. If a relay coil is connected or any other inductive load to the transistor outputs, a back EMF suppression diode must be fitted across the load. STBY STBY is a hardware toggle switch. If it is briefly pulsed (about 50ms) to GND it puts the sensor head into Standby mode and the S930 into Sleep mode. If pulsed again to GND it will return to normal operation. This can be used to protect the sensor during process room cleaning and/or to reduce power and extend sensor life when the sensor is not needed. Page | 5 Aeroqual Series 900 User Guide 3.2. Operation as a Relay Controller The S930 has a set of integrated relay contacts which can be used to operate the instrument as a simple relay controller. The relays need to be wired into the instrument using the relevant alarm or control outputs, which are open collector current sinks. The alarm and control outputs are set to ground when activated according to their set points. The set points can be configured by computer using the Configuration PC software. It is recommended that the DIAG output is always used to alert a sensor fault condition. 3.2.1. Procedure a. b. c. d. e. f. Connect 24VDC power supply Connect alert relay/alarm to DIAG output screw connector if required Connect relay ground toggle to STDBY pin on the screw connector if required. Connect control relay to CNTL output on the screw connector if required. Connect relays to LoALM and/or HiALM alarm outputs on the screw connector if required Power on and test response. Internal Relay Power Supply (24VDC) N E External Device 100-240VAC L Note: HiALM, LoALM and DIAG are also transistor outputs 3.3. Operation as a 4-20 mA transmitter The Series 930 can be connected to a PLC or current sensing device via the 4-20mA output to provide concentration information. The output is linearly proportional to concentration. The full scale (20mA) value is factory set but can also be user configured with the Configuration PC software. If the sensor fails the output will be 20mA. It is also recommended that the DIAG output is used to monitor for fault conditions. The 4-20mA output loop is opto-isolated from the Series 930 unit and it is recommended that it be powered by a separate power supply with a voltage in the range 12-24V applied with the correct polarity. This will produce the most reliable connection method. If opto-isolation is not important then the 4-20 mA loop may be powered by the same power supply as the unit. Page | 6 Aeroqual Series 900 User Guide 3.3.1. Procedure a. Connect the 4-20mA loop on the screw connector to the power supply and current measuring device (e.g. PLC) ensuring the polarity is correct. Please refer to the diagrams below. Note: If the polarity is incorrect the 4-20mA output may be permanently damaged b. Power on the S930 and PLC c. Check the PLC or current sensing device to ensure data is being shown Note: The 4-20mA outputs are located on the side of the unit as shown in the diagrams below 4-20 mA wiring diagram for Loop without opto-isolation 4-20mA + GND + GND - + + Power Supply PLC or Current Meter 24VDC 4-20 mA wiring diagram for Loop with opto-isolation 4-20mA + GND + - - + + Power Supply PLC or Current Meter Power Supply 24VDC Page | 7 Aeroqual Series 900 User Guide 4-20 mA wiring diagram for Loop with integrated display 4-20mA + GND + - - + + Power Supply Integrated Display External Device 24VDC Note: The integrated display is a single ended device and therefore always needs to be located at the end of the loop. 3.4. Operation as a RS485 Transmitter The Series 930 unit can communicate over a RS485 bus. Each monitor has an ID which can be user defined via the Configuration PC software. Up to 255 units can be networked together using the Network PC software. Note: Both the Configuration and Network PC software can be found on our website www.aeroqual.com 3.4.1. Connecting via RS485 a. Connect a 24vDC power supply to the power input on the PCB screw connector b. Use a twisted pair cable to connect the RS485 lines on the screw connector to the RS485 hub, bus or converter c. Power up the monitor and run the communication software on your computer or PLC 3.4.2. Network Settings If the S930 is to be used as part of a “daisy chained” RS485 network a number of settings need to be adjusted. Jumper settings The termination resistors need to be set correctly to ensure the network communication is stable. The jumpers JP1, JP2, JP3 are to install termination resistors on the RS485 communication lines. Remove the jumpers J1, J2, J3 for all S930 units in a chain except the last S930 unit in the network chain. If there is only one unit then set the jumpers in place. To access these jumpers remove the sensor head and unscrew the S930 base plate. Page | 8 Aeroqual Series 900 User Guide ID Settings Monitors on the network require unique IDs so they can be distinguished on the RS485 network. The factory default ID of the units is ID 1. Therefore they will need to be changed to unique IDs. Use the Configuration PC software to change the IDs. 4. S930 Specifications Power (user supplied) 24V DC, 500mA (range 22-26V DC) Analogue output 4-20mA (opto-isolated), 12-24V External signal type Transistor output (150mA max) External signals (4) Low Alarm | High Alarm | Control | Diagnostics LED Display Optional Inputs Standby toggle Communication RS485 (Aeroqual proprietary protocol) Jumpers J1, J2, J3 termination resistors Connectors Screw ID 1 (Default) User configurable from 1 to 255 Alarm set points (2) User configurable Control set point User configurable Removable/replaceable sensor head Yes Sampling method Active sampling via internal sensor fan Temperature & humidity sensor (Optional) Range -40°C to 124°C (-40°F to 255°F) | Range 0 to 100% RH Configuration software PC Configuration Software Data logging & networking software PC Data Logging & Networking Software Enclosure casing Fibre reinforced polycarbonate | IP41 & NEMA 2 equivalent Enclosure size 180 x 110 x 90 (mm); 7⅛ x 4¾ x 3½ (in) Weight < 850 g; < 30 oz Approvals Part 15 of FCC Rules EN 50082-1: 1997 EN 50081-1: 1992 5. Gas Measurement Guidelines The S930 should be installed at a location that is free from contaminants that might affect the performance of the sensor head. Please contact [email protected] for assistance with specific chemicals that you believe may adversely affect the supplied sensor. In general the S930 should never be exposed to: - Steam, fumes, water or chemical spray - Aggressive solvents - High condensing humidity - Cooking vapours/aromas - Paint fumes - High levels of dust Ensure that the controller is protected from excessive water splashing, dust, vibration, excessive heat or cold, excessive swings in humidity and gas concentrations outside the range of the specific sensor head. Page | 9 Aeroqual Series 900 User Guide 6. Troubleshooting Fault Description Possible Cause Remedy Power connection broken Reconnect power cable Power supply failure Replace 24V power supply S930 damaged Replace unit RS485/RS232 adaptor faulty Reconfigure/replace adaptor Connections broken Reconnect leads ID incorrect Check ID Noise on cable Use shielded twisted pair cable Sensor head not fitted correctly Insert head correctly 30V input exceeded Replace S930 ID conflict Modify IDs so that no S930 units share the same ID Noise on cable Use shielded twisted pair cable Jumpers set incorrectly Set jumpers correctly 930 units too close together The cables between the S930 units should be a minimum of 30 cm in length Display shows -1 Over-range (>20mA) reverse loop current Loop polarity is incorrect. Reverse the polarity. Incorrect loop polarity can cause irreversible damage to the 930 unit Display shows 1 Over-range loop current (>20 mA) Reduce loop current 4-20mA loop not powered Power loop. The display requires the loop to be powered to read correctly Sensor head not fitted correctly Insert sensor correctly Insufficient warm-up Run the sensor for 24-48 hours Air contaminated Move the sensor to cleaner environment and check reading Sensor damaged Replace sensor Background gas level higher than normal Move sensor to clean environment and recheck baseline Interference gas present Move sensor to clean environment and recheck baseline Sensor zero drift Rezero sensor in a clean, stable environment Sensor damaged Replace sensor Zero calibration incorrect Zero calibrate sensor Span calibration incorrect Span calibrate sensor Interference gas present Move sensor to clean environment and check reading upon exposure to know concentration of gas Sensor calibration lost Replace sensor No Power RS485 communications unstable 4-20mA output failure Network unstable If connected to a display: Display shows -.125 Display oscillated between min and max Sensor failure when new sensor connected Sensor showing high baseline reading under zero gas conditions Sensor showing higher than expected reading in the presence of sensor gas Page | 10 Aeroqual Series 930 User Guide Sensor showing lower than expected reading in the presence of sensor gas Sensor output noisy Zero calibration incorrect Zero calibrate sensor Span calibration incorrect Span calibrate sensor Sensor inlet contaminated Clean sensor inlet filter and mesh Interference gas present Move sensor to clean environment and check reading upon exposure to know concentration of gas Gas reactive and decomposing before detection Move the monitor closer to the source of the gas Sensor calibration lost S930 power supply unregulated Replace sensor Install regulated power supply Local air flow too high Reduce air flow Environmental conditions fluctuating Reduce fluctuations 7. Diagnostics The S930 has inbuilt diagnostics to detect sensor faults. If the sensor fails it can be easily replaced by removing and installing a new sensor head. The failed sensor can be sent back to Aeroqual for replacement or disposal. The fault conditions are explained in the below table: Fault Description DIAG output 4-20mA output No fault Floating Valid gas reading Sensor failure GND 20mA Sensor aging GND 20mA Sensor not fitted correctly GND Oscillated between 4 and 20mA RS485 output Valid gas reading Status 1 = 0x00 Last valid gas reading Status 1 = 0x01 Last valid gas reading Status 1 = 0x02 No reply 8. RS485 Protocol The S930 network system is based on industrial protocol RS485. This command protocol is specified by Aeroqual Limited. Copyright reserved 2004. The network communication is in master-slave mode, which means that a PC or other device will be the network master. All information is requested by the network master. Otherwise no information is sent out by the S930 network units. Section 1 General description of the communication commands (for command details and data representations please refer section 4): 01. Information request command to S930. The basic format is a 5 bytes data stream: BASE, COMMAND, NETWORK_ID, OTHERS, CHECKSUM Page | 11 Aeroqual Series 930 User Guide * BASE - information request data stream header * COMMAND - 1 byte network unit action command * NETWORK_ID - 1 byte 930 network ID. * OTHERS - may used to extend functions later, it can be left as empty for now * CHECKSUM - makes the data stream total sum byte value to zero. That's tow's complement of the total sum of the data stream, except CHECKSUM byte. 02. 930 unit basic reply command format will be a 15 bytes stream (see section 2 for details): Index 0 1 2 3-6 7 - 10 11 12 13 14 SENSOR, COMMAND, NETWORK_ID, DATA1(4 bytes), DATA2(4 bytes), RESERVED, STATUS1, STATUS2, CHECKSUM Section 2 S930 Network ID specified commands. These commands generate a response by a specified S930 unit. Every command needs a corresponding reply. 01. Gas Data request command. The command asks for the gas data that a specific S930 unit currently holds. The S930 unit responds with an gas value. The gas data validity depends on the DATA_UNVALID bit of STATUS1 flag (please see Section 4 for details). Command: BASE, GAS_CONC_DATA, NETWORK_ID, EMPTY, CHECKSUM Reply: SENSOR, GAS_CONC_DATA, NETWORK_ID, DATA1, TEMP, RH, RESERVED, STATUS1, STATUS2, CHECKSUM * DATA1 - 4 bytes IEEE754 floating point data, measured gas value, if DATA_UNVALID bit of STATUS1 flag is 1 then it will be last measured value, otherwise it's new measured value. * TEMP - 2 bytes unsigned int value, its actual value equals the int value divided by 10 (TEMP/10) for its real temperature value of S930 unit * RH - 2 bytes unsigned int value, its actual value equals the int value divided by 10 (RH/10) for its real relative humidity value of 930 unit * For 930 the field TEMP and RH will be always zero for Version 1.5 and later. * However, for S930 version 1.4 and earlier can't use this command to request temperature and humidity. 02. Standby command. The S930 unit will set its sensor head to standby state. The 930 will set STANDBY bit of STATUS2 to 1 indicating it is in standby mode. When the standby state has been terminated, it will reset STANDBY bit of STATUS2 to 0. Command: BASE, STANDBY, NETWORK_ID, EMPTY, CHECKSUM Reply: SENSOR, STANDBY, NETWORK_ID, DATA1, DATA2, RESERVED, STATUS1, STATUS2, CHECKSUM * DATA1 and DATA2 - no meanings. * The reply just confirms that it performed action, to find it check status bit. Page | 12 Aeroqual Series 930 User Guide 03. Specific 930 reset command. The command will reset the 930 at any time. Command: BASE, RESET, NETWORK_ID, EMPTY, CHECKSUM Reply: SENSOR, RESET, NETWORK_ID, DATA1, DATA2, RESERVED, STATUS1, STATUS2, CHECKSUM * DATA1 and DATA2 - no meanings. * RESET - 1 byte reset command, see section 4 for details. 04. Specific 930 unit connected sensor head version number request command and reply. PC or other devices can request sensor head version information through 930 unit. Command: BASE, SENSOR_VERSION, NETWORK_ID, EMPTY, CHECKSUM Reply: SENSOR, SENSOR_VERSION, NETWORK_ID, VERSION_NUM, DISPLAY_TYPE, NAME_LENGTH, SENSOR_NAME, RESERVED, CHECKSUM * VERSION_NUM - 1 byte, the version number of sensor head plugged in the 930 unit * DISPLAY_TYPE - 1 byte, the decimal value display type, different gas sensor head are different, see section 3 for details * NAME_LENGTH - 1 byte, the sensor head name length. * SENSOR_NAME - 7 bytes max, valid length depends on NAME_LENGTH value, the sensor head name ASCII code that connected to 930 unit, 05. Modify 930 unit network ID command that can change current 930 unit network ID. Command: BASE, CHANGE_NETWORK_ID, OLD_ID, NEW_ID, CHECKSUM Reply: SENSOR, CHANGE_NETWORK_ID, NEW_ID, DATA1, DATA2, RESERVED, STATUS1, STATUS2, CHECKSUM * CHANGE_NETWORK_ID - 1 byte command, see section 3 for details. * OLD_ID - the 930 unit old network ID. * NEW_ID - the 930 unit new network ID 06. Specific 930 connected sensor gas unit ppm to mg/m3 convert factor and analog current max output scale factor value request command. Command: BASE, FACTOR_REQUEST, NETWORK_ID, EMPTY, CHECKSUM Reply: SENSOR, FACTOR_REQUEST, NETWORK_ID, DATA1, DATA2, RESERVED, STATUS1, STATUS2, CHECKSUM * DATA1 - 4 bytes, gas unit ppm to mg/m3 convert factor floating point value * DATA2 - 4 bytes, default 930 current output max scale factor floating point value 07. 930 unit configuration settings upload command, which sets the 930 unit alarm 1, alarm 2,defined output scale and alarm enable settings. Total 25 bytes data stream. Command: BASE, PARAMETERS_UPLOAD, NETWORK_ID, EMPTY, CHECKSUM Parameters: BASE, PARAMETERS_UPLOAD, NETWORK_ID, ALARM1, ALARM2, DEFINED_SCALE, CONTROL_HIGH, CONTROL_LOW, ALARM_STATUS, CHECKSUM Reply: SENSOR, PARAMETERS_UPLOAD, DATA1, DATA2, RESERVED, STATUS1, STATUS2, CHECKSUM * ALARM1 - 4 bytes alarm level 1 set point value, see section 4 for its data representation. Page | 13 Aeroqual Series 930 User Guide * ALARM2 - 4 bytes alarm level 2 set point value, see section 4 for its data representation. * DEFINED_SCALE - 4 bytes user defined max output scale value. * CONTROL_HIGH - 4 bytes control high set point value see section 4 for its data representation. * CONTROL_LOW - 4 bytes control low set point value see section 4 for its data representation. * ALARM_STATUS - 1 byte alarm state settings, see section 3 for details. * Reply just used for confirm uploading successfully, DATA1 and DATA2 no real meanings. 08. 930 unit configure settings download command, total 25 bytes stream. Command: BASE, PARAMETERS_DOWNLOAD, NETWORK_ID, EMPTY, CHECKSUM Reply: SENSOR, PARAMETERS_DOWNLOAD, NETWORK_ID, ALARM1, ALARM2, DEFINED_SCALE, CONTROL_HIGH, CONTROL_LOW, ALARM_STATUS, CHECKSUM * ALARM1 - 4 bytes alarm 1 set point value, see section 4 for its data representation * ALARM2 - 4 bytes alarm 2 set point value, see section 4 for its data representation * DEFINED_SCALE - 4 bytes user defined max output current output value * CONTROL_HIGH - 4 bytes control high set point value see section 4 for its data representation * CONTROL_LOW - 4 bytes control low set point value see section 4 for its data representation * ALARM_STATUS - 1 byte alarm state settings, see section 4 for details 09. Specific 930 base unit version number request command and reply. PC or other devices can request the base unit version information. Command: BASE, BASE_VERSION, NETWORK_ID, EMPTY, CHECKSUM Reply: SENSOR, BASE_VERSION, NETWORK_ID, VERSION_NUM, SENSOR_COUNT, RESERVED, RESERVED, RESERVED, RESERVED, RESERVED, RESERVED, RESERVED, RESERVED, RESERVED, CHECKSUM * VERSION_NUM - 1 byte, the version number of the 930 unit * SENSOR_COUNT - 1 byte, actually used to specify its 930 if it's 0x01, that is 930 no temperature and humidity sensor connected, if it's 0x03, that is 930 there is a temperature and humidity sensor connected. 10. Temperature and relative humidity data request command. The command asks for the temperature and humidity data that a specific 930 unit currently holds. The 930 unit responds with two values respectively. Command: BASE, TEMP_RH_DATA, NETWORK_ID, EMPTY, CHECKSUM Reply: SENSOR, TEMP_RH_DATA, NETWORK_ID, TEMP, RH, RESERVED, STATUS1, STATUS2, CHECKSUM * TEMP - 4 bytes IEEE754 floating point data, measured temperature value of 930 unit, * RH - 4 bytes IEEE754 floating point data, measured relative humidity value of 930 unit * For 930 the command will be no reply at all. Page | 14 Aeroqual Series 930 User Guide Section 3 Broadcast commands are a set of special commands of the network system. Every unit that receives the commands on the network performs the action. They are not ID specific, BROADCAST command indicator can be considered as NETWORK_ID. These commands send out by network master and that don't need reply at all. * BROADCAST is a 1 byte special 930 ID that is zero * 01. Broadcast 930 standing by command, this command will set all sensor head that connected to the network go to stand by state. The command generates no reply. To check whether a 900 unit has performed the command, the network master should check STATUS2's STAND_BY bit. BASE, STANDBY, BROADCAST, EMPTY, CHECKSUM * BROADCAST - 1 byte broad cast indicator, see section 3 for its value 02. Broadcast 930 reset command; it will reset whole network sensor heads that connected to. The command generates no reply. To check whether a 900 unit has performed the command, the network master should check STATUS2's STAND_BY bit. BASE, RESET, BROADCAST, EMPTY, CHECKSUM * BROADCAST - 1 byte broad cast indicator, see section 3 for its value Section 4 Protocol commands value and descriptions: BASE = 0x55 command header used for network master to 930 SENSOR = 0xAA reply header used for 930 to network master STANDBY = 0xFD command used to set sensor head standing by mode RESET = 0x07 command to reset sensor head to normal working state GAS_CONC_DATA = 0x10 command to request/report measured gas concentration value TEMP_RH_DATA = 0x20 command to request temperature and humidity values BASE_VERSION = 0xF9 command to request/report 930 base unit version number SENSOR_VERSION = 0xFB command to request/report sensor head version number FACTOR_REQUEST = 0x2A command to request/report sensor head concentration ppm to mg/m3 conversion factor and max current output scale factor BROADCAST = 0x00 broadcast command indicator, like a special 930 ID reserved for information broadcast PARAMETERS_UPLOAD = 0x19 command to upload configure settings to 930 PARAMETERS_DOWNLOAD = 0x18 command to download configure settings from 930 EMPTY = 0x00 no meanings at all, reserved space RESERVED can be any value, not any meanings at all CHECKSUM data stream check sum used to verify the command data stream information lost or noise. It makes the data stream total sum to zero. NETWORK_ID range: 0x00 -- 0xFF, 0x00 is reserved for broadcast command. 0x01 will be the default ID when 930 has been programmed. Page | 15 Aeroqual Series 930 User Guide STATUS1 (1 Byte) SensorStatus0 b0 \ b1=0, b0=0, sensor is normal, SensorStatus1 b1 / b1=0, b0=1, sensor failure no gas reporting b1=1, b0=0, means sensor aging, FAN_STATUS b2 UNIT_UNSTABLE_FLAG STATUS2 reserved b3 sensor head is at setting up stage not stable yet RESERVED b4 reserved RESERVED b5 reserved SensorResetFlag b6 sensor head is doing reset DATA_UNVALID b7 the data is not valid data, maybe last reported reading (1 Byte) not used now, reserved for further developing RESERVED b0 reserved RESERVED b1 reserved RESERVED b2 reserved RESERVED b3 reserved STANDBY b4 = 1, sensor head in stand by mode b4 = 0, sensor head in normal working mode RESERVED b5 reserved RESERVED b6 reserved RESERVED b7 reserved ALARM_STATUS (1 Byte) used for alarm status setting Alarm_Enable b0 = 0, 930 alarm enabled, b0 = 1, 930 alarm disabled Alarm2_Triger b1 = 0, 930 alarm 2 triggered when reading exceed alarm 2 b1 = 1, 930 alarm 2 rigged when reading below alarm 2 Define_Ouput_Scale b2 = 0, use sensor head default current output value b2 = 1, user defined current output value RESERVED b3 reserved RESERVED b4 reserved RESERVED b5 reserved RESERVED b6 reserved RESERVED b7 reserved The following data values use IEEE754 32 bits floating point little endian representation. These data are: DATA1, DATA2, ALARM1, ALARM2, DEFINED_SCALE, CONTROL_HIGH, CONTROL_LOW. Page | 16 Aeroqual Series 930 User Guide Section 5 Data transfer mechanism 1. Floating point data (4 bytes) send sequence is low byte first, high byte last, such as section 4's data DATA1, ALARM1, ALARM2 etc. 2. Broadcast command - when network master broadcast a command to RS485 bus, every unit connected to the bus has to perform the action immediately without reply. Whether the command has been performed or not can be tested using a specific sensor command to poll an individual unit. If some sensor heads do not perform the action the network master needs to rebroadcast the command again. 3. Specific unit sensor measured gas concentration request. Once a sensor head measures a new concentration it will set STATUS1 b7 to zero indicating the value is valid. However, when the new data has been sent out the STATUS1 b7 DATA_UNVALID bit will set to 1 indicating the data not valid. 4. Timing issue (VERY IMPOTANT): The master request command frequency can't be less than 1 second per command; otherwise, the network will be unstable. Section 6 RS485 communication port settings: Baud rate: 4800 Data bits: 8 Stop bits: 1 Parity: none Flow control: none 9. Care and Maintenance Your Aeroqual Monitor is a product of superior design and quality and should be treated with care. When using your Aeroqual Monitor: Keep it and all its parts and accessories out of the reach of small children. Keep it dry. Avoid water and/or condensation as humidity and liquids may damage sensitive electronics and the Li battery. Do not use or store in dusty, dirty areas. Do not store the monitor in temperatures below 10°C or above 35°C. This unit is designed for use at temperatures between -5°C and +45°C however please consult recommended operating temperature for the sensor head which may be different. Avoid sudden changes in temperature which may cause condensation that can damage the electronics. Do not attempt to open. Non-expert handling of the device may cause damage. Do not drop, knock or shake as this could lead to internal damage. Do not use harsh chemicals, cleaning solvents or strong detergents for cleaning. Wipe with a soft cloth slightly dampened with a mild soap-and-water solution 9.1. Disposal / Recycling Please note that this is an electronic product and disposal should be in line with your local or country legislation. The plastic casing of the product is made from a Polycarbonate / ABS blended material (PC + ABS) and is marked accordingly. Page | 17 Aeroqual Series 930 User Guide 10. Appendix 10.1. Copyright Copyright Aeroqual Limited. All rights reserved. Reproduction, transfer, distribution or storage of part or all of the contents of this document in any form without the prior written permission of Aeroqual Limited is prohibited. “Aeroqual” is a registered trademark of Aeroqual Limited. Other product and company names mentioned herein may also be trademarks or trade names. Aeroqual operates a policy of continuous development. Aeroqual re-serves the right to make changes and improvements to any of the products described in this document without prior notice. Under no circumstances shall Aeroqual be responsible for any loss of data or income or any special, incidental, consequential or indirect damages howsoever caused. The contents of this document are provided "as is". Except as required by applicable law, no warranties of any kind, either express or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose, are made in relation to the accuracy, reliability or contents of this document. Aeroqual reserves the right to revise this document or withdraw it at any time without prior notice. The availability of particular products may vary by region. Please check with the Aeroqual dealer nearest to you. 10.2. Software License Aeroqual will retain ownership of all intellectual property in the Fixed Monitor Software. The buyer acknowledges that they are granted a perpetual, non-exclusive, non-transferable license for the right to use the Software for the buyer’s exclusive use and only in conjunction with Aeroqual Products (Intended use). The buyer will strictly adhere to the Intended Use of the Software and will not translate, adapt, reverse compile or other-wise alter the Software. The buyer undertakes not to disclose, assign, sell, rent, lend, sub license or otherwise transfer the Software. 10.3. Terms and Conditions This product is warranted according to Aeroqual Ltd.’s Terms of Trade. For further warranty information, please refer to the standard Product Warranty Policy as published on the Aeroqual website at www.aeroqual.com. 10.4. Statements of Compliance 1. The Aeroqual Series 930 Fixed Monitor complies with EN 50082-1: 1997 2. The Aeroqual Series 900 Fixed Monitor complies with EN 50081-1: 1992 3. The Aeroqual Series 900 Fixed Monitor complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: These devices may not cause harmful interference, and These devices must accept any interference received, including interference that may cause undesired operation. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no Page | 18 Aeroqual Series 930 User Guide guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. 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