STATUS SCIENTIFIC CONTROLS FGD10A-M Installation, Commissioning & Routine Gas Testing Manual Download Page 72

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STATUS SCIENTIFIC CONTROLS

Installation, Commissioning & Routine Gas Testing

FGD10A-M Gas Detector

TD18/032

Issue:

Change Note:

1869

Page 71

LOGICAL

ADDRESS

(R/W)

DATA

TYPE

DESCRIPTION

40235

R/W

MSFP16

Hysteresis Value Float

Most significant 16 bits of IEEE574
floating point value.

40236

R/W

LSFP16

Hysteresis Value Float

Least significant 16 bits of IEEE574
floating point value.

40237

R/W

uINT16

Warm up Timer

: e.g. 0x002d=45s

40238

R/W

uINT16

Screen On Time

e.g. 0x0001= 1 min

40239

R/W

uINT16

Screen Off Time

e.g. 0x000A= 10 min

40251

R/W

uINT16

RTC Seconds

e.g. 0x002F= 47

40252

R/W

uINT16

RTC Minutes

e.g. 0x001C= 28

40253

R/W

uINT16

RTC Hours

e.g. 0x000D =1 pm

40254

uINT16

RTC Weekday

not yet implemented

40255

R/W

uINT16

RTC Day

e.g. 0x0013 =19th

40256

R/W

uINT16

RTC Month

e.g. 0x0006= June

40257

R/W

uINT16

RTC Year

e.g. 0x000D= 2013

40301

uINT16

Alarm1 Year

The year the most recent alarm1
occurred e.g. 0x000D= 2013

40302

uINT16

Alarm1 Month

The month the most recent alarm1
occurred e.g. 0x0006= June

40303

uINT16

Alarm1 Day

The day the most recent alarm1
occurred e.g. 0x0013 =19th

40304

uINT16

Alarm1 Hours

The hour the most recent alarm1
occurred e.g. 0x000D =1 pm

40305

uINT16

Alarm1 Minutes

The minute the most recent alarm1
occurred e.g. 0x001C= 28

Summary of Contents for FGD10A-M

Page 1: ...STATUS SCIENTIFIC CONTROLS Issue 10 Date 21 1 19 Firmware V2 1 0 Installation Commissioning Routine Gas Testing Manual Gas Detector Type FGD10A M ...

Page 2: ...STATUS SCIENTIFIC CONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector ...

Page 3: ...ant with the above harmonised standard because both the instrument housing and GSH4 sensor housing are certified to that standard Notified Body for Hazardous Area Certification SIRA Certification Service Rake Lane Eccleston Chester CH4 9JN Notified Body Number 0518 Notified Body for ATEX Quality Assurance Notification Baseefa Rockhead Business Park Staden Lane Buxton SK17 9RZ UK Notified Body Numb...

Page 4: ...STATUS SCIENTIFIC CONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector ...

Page 5: ...YING POWER 16 6 2 SCREEN SAVER 17 6 3 INDICATORS 18 7 RELATIVE RESPONSE CHARACTERISTICS 18 8 INITIAL GAS TESTING 20 8 1 ZERO GAS 20 8 2 TEST GAS 22 8 2 1 Gas connection points 22 8 2 2 Sampling time 23 8 2 3 Suggested calibration gas levels 23 9 SOFTWARE FEATURES 24 9 1 MENU SELECTION 26 9 1 1 Password Enabled Menu 26 9 1 2 Sensor Zero 28 9 1 3 Sensor Span 29 9 1 4 Sensor FSD 32 9 1 5 4 20 mA Curr...

Page 6: ...ERFACE 64 MODBUS ISO IEC 7498 1 PHYSICAL LAYER DESCRIPTION 64 10 1 MODBUS ISO IEC 7498 1 APPLICATION LAYER DESCRIPTION 64 10 2 MODBUS REGISTER LIST 65 10 3 MODBUS PROGRAMMING EXAMPLES 74 10 3 1 Example 1 Read Gas Level command 74 10 3 2 Example 2 Method for recalculating CRC checksum 76 10 3 3 Example 3 Received Modbus frame from FGD10AM 77 10 3 4 Example 4 Write Calibration gas level to Modbus re...

Page 7: ...nu SSCL only factory setup menu RTC calibration in TIME menu Extra diagnostic menu and diagnostic functions V2 0 4 29 01 14 Fix for diagnostics Oxygen display span data V2 0 3 22 12 13 Pellistor support added Enhanced menu system Modbus support added V2 0 2 08 11 13 Enhanced context sensitive menus Modbus NOT supported in this release V2 0 1 06 09 13 Release for Exhibition Flammable gases list V2 ...

Page 8: ...Optional Weather guard 3 SCOPE OF THE MANUAL This manual relates to versions of the FGD10A M gas detector with one of the following sensor types An Infrared sensor for the detection of Hydrocarbon HC or CO2 gases A Pellistor sensor for the detection of hydrocarbon and hydrogen gases A Toxic sensor An Oxygen sensor Note Infrared sensors are unsuitable for the detection of Hydrogen However this gas ...

Page 9: ...IC CONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 8 4 DESCRIPTION FGD10A M GAS DETECTOR FGD10A M GAS DETECTOR FITTED WITH PROTECTIVE WEATHERGUARD ...

Page 10: ...g having two cable gland entries and containing the connection terminals electronics and display window The housing containing the gas sensor has an M27 thread and is screwed into the bottom of the unit The sensor housing itself is a certified component and must not be removed in service Behind the display window are A 160x128 graphics OLED display Four magnetically operated switches that are acti...

Page 11: ...ys Each provides a set of voltage free changeover contacts to perform the following control functions Alarm Level 1 Alarm Level 2 Fault Versions without relays fitted are also available The self adhesive label on the outer surface of the enclosure indicates whether or not the relays are fitted as shown below GAS DETECTOR TYPE FGD10 CONTROL RELAYS FITTED GAS DETECTOR TYPE FGD10 NO CONTROL RELAYS FI...

Page 12: ... observes the relay contact rating and ensures that external circuits connected to the relay contacts are suitably protected from exceeding that rating and associated cabling is adequately rated and suitably installed Guidance on the correct installation of systems is provided by EN60079 14 2008 It is the responsibility of the installer to ensure compliance with the relevant standards To ensure ef...

Page 13: ...sure towards the PCB mounted terminal connections situated near to the front of the enclosure 5 2 Mounting and terminal access The FGD10A M should be mounted and secured using the mounting holes on the main unit Figures 2 and 3 shows details of the FGD10A M terminal connections these can be accessed as follows 1 Switch OFF the supply to the FGD10A M 2 Release the grub screw located near the lip of...

Page 14: ...STATUS SCIENTIFIC CONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 13 Figure 1 Unplugging the display board for connection purposes ...

Page 15: ...to a high integrity earth ATEX certified Ex d armoured cable glands PSU Aout RS485 Armoured cable Armoured cable Mount vertically as shown N O COM N C Relay 1 Alarm 1 N O COM N C Relay 2 Alarm 2 N O COM N C Relay 3 Fault Important Connect enclosure earth point to a high integrity earth ATEX Certified compound filled conduit seals stopping boxes PSU Aout RS485 Conduit Conduit Mount vertically as sh...

Page 16: ...ns of indicating to external equipment e g data loggers remote displays control cards the gas levels currently being detected by the system The output is in the form of the industry standard 4 to 20mA current source The analogue output is factory set such that 4mA represents zero gas and 20mA represents the full scale gas level of the FGD10A M Figure 4 Analogue Output 5 6 RS485 Output This output ...

Page 17: ...several times clockwise until it reaches its limit then secure using the grub screw do not over tighten 6 1 Applying power Once the installation is complete and the covers are secure then power can be applied The power source should be between 8 and 24 volts dc When power is first applied to the FGD10A M an initialisation procedure is performed as follows LOGO FGD10A V1 1 1 Tel 0 1234 123456 www c...

Page 18: ...e where the display alternates between the display logo and the actual gas readings as seen below LOGO 0 The logo and the gas readings alternate and appear at random positions on the screen The screen normally will display the normal screen for 1 minute then will show the screen saver for between 1 and 10 minutes The screen saver mode can be set up using the menu options as described later The scr...

Page 19: ...nless otherwise specified the FGD10A M infrared hydrocarbon gas detector is calibrated to provide an output signal linearised for methane CH4 during manufacture However the gas detector will also respond to a range of hydrocarbon gases The characteristics shown in Figure 5 demonstrate the relative response to some of the common hydrocarbons If the expected target gas is other than methane then eit...

Page 20: ...STATUS SCIENTIFIC CONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 19 ...

Page 21: ...cate before attempting to check the zero setting and gas response usually 30 minutes 8 1 Zero gas With no gas present check that the instrument reads zero on the display a If the instrument reads zero then no adjustment is required and gas response testing may now be carried out as described in Section 8 2 b If the instrument does not read zero then adjustment of the zero setting is required as de...

Page 22: ...D18 032 Issue 10 Change Note 1869 Page 21 Figure 6 Arrangement for Application of a Certified Test Gas Certified Test Gas Cylinder Remote Sampling Point 6mm O D Sampling Tube Calibration Adaptor Metal sampling adaptor Stock No SS336 Without weatherguard With weatherguard Flow Regulator 1 Litre min ...

Page 23: ...described in Section 9 1 3 Sensor Span 8 2 1 Gas connection points Certified test gas can be applied either a directly to the FGD10A M via the appropriate sampling calibration adaptor or b remotely by connecting a test gas sampling tube to the appropriate sampling calibration adaptor and installing a test point at the remote end of the tube Method b avoids the need to gain direct access to the uni...

Page 24: ...f a sampling adaptor Stock No SS336 is required in order to present the gas to the FGD10A M sensor 8 2 2 Sampling time Apply the test gas and allow a sufficient time for the sample to reach the gas detector The response time will vary according to the length of the sampling tube 8 2 3 Suggested calibration gas levels Hydrocarbon sensor Zero gas free air Span 50 of the measuring range ...

Page 25: ...revious Decrease 2 ENTER 3 Accept selection 3 This section of the manual discusses how the available menu options can be accessed how the associated parameter may be changed via the selected menu option and what effect the change to the parameter has on the operation of the FGD10A M The FGD10A M incorporates magnetically operated switches to allow non intrusive operation of the menu system To pres...

Page 26: ...issioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 25 Note It is important that that the FGD10A M is correctly configured for the sensor in use prior to performing any feature available in the menu system ...

Page 27: ...ystem to restrict the end user from carrying out certain changes that may compromise the use of the equipment Setting the password to OFF will give the user access without compromise 9 1 1 Password Enabled Menu The following options are available without a password Press the MENU button the display will ask for a password press the MENU button again Zero Span Loop 4 mA Loop 20 mA Version ...

Page 28: ...1 Set by user Diagnostics Via password 1 Set by user Hysteresis Via password 1 Set by user Display Via password 1 Set by user Warm up Timer Via password 1 Set by user Pos Zero Via password 1 Set by user Neg Zero Via password 1 Set by user Time Via password 1 Set by user Screen Saver Via password 1 Set by user Restore Via password 1 Set by user Sensor Type Via password 1 Set by user Sensor Bias Via...

Page 29: ...xide sensors cannot be zeroed in air due to the background levels of CO2 present These sensors are best zeroed whilst being exposed to 100 nitrogen 2 Where a purging gas has to be applied use a flow rate of between 500 and 1000cc min Allow sufficient time for the sensor to respond Press ENTER to zero the sensor will be displayed to confirm the sensor zero has been performed Note Pressing MENU rath...

Page 30: ...nd From the menu system select menu option Sensor Span and press ENTER Gas Level Edit Use the button to select an individual digit then use the button to change the digit to 0 through 9 continue for all digits until the desired gas level is set Press ENTER to accept the new gas level will be displayed to confirm the new gas level Press the MENU button to exit the gas editing menu The display shows...

Page 31: ...STATUS SCIENTIFIC CONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 30 ...

Page 32: ...ne Apply a known concentration of Propane e g 55 LEL at a flow rate of between 500 and 1000cc min Allow time for the sensor to respond From the menu system select menu option Sensor Span and press ENTER Gas Level Edit For calibration gas 1 1 this corresponds to a gas level of 55 at the default LEL of 2 0 v v Change the gas level to 55 and press ENTER Calibration Span Sensor To accept the calibrati...

Page 33: ...by this menu Use the button to select an individual digit then use the button to change the digit to 0 through 9 continue for all digits until the desired FSD is set Press ENTER to accept the new gas level will be displayed to confirm the new FSD Note Pressing MENU instead of ENTER will exit the menu without changing the value Press MENU to close the menu system Note changing the FSD must be used ...

Page 34: ...put Note the 4mA range should always be set prior to adjusting the 20 mA range From the menu system select menu option Loop 4 mA or Loop 20 mA and press ENTER Set 4 mA Edit Set 20 mA Edit Using the buttons to increase decrease the loop current Press ENTER to accept the new loop current setting will be displayed Note Pressing MENU instead of ENTER leaves the setting unchanged Press the MENU button ...

Page 35: ... level and press ENTER The Edit window will appear Alarms Edit Use the button to select an individual digit or the sign the use the button to change the to a and the digit to 0 through 9 continue for all digits until the desired alarm set point is set Press ENTER to accept the new alarm level will be displayed Note Pressing MENU instead of ENTER leaves the alarm set point unchanged Press MENU to r...

Page 36: ... option Version and press ENTER If a Premier IR sensor is fitted both the FGD10AM firmware version is displayed and the Premier IR sensor version is displayed as in the following example Version Exit FGD10AM V2 x y Premier IR version V07 17 02U Oct 9 2013 If the sensor fitted is not a Premier Infrared type then only the FGD10AM firmware version is displayed Press MENU to close the menu system ...

Page 37: ...ption Relay Modes and press ENTER Relays Select Relay 1 2 3 Using the button to select the desired relay and press ENTER The Edit window will appear Relays Edit Energised Yes Direction Rising The mode of operation can be changed by pressing the button The function can be changed by pressing the button Press ENTER to accept the new setting will be displayed Note Pressing MENU instead of ENTER leave...

Page 38: ...button has been pressed during the normal screen From the menu system select menu option Latching Relay Modes and press ENTER The following display is shown Latching Relays Edit Off Use the button to select On and the button to select Off Press ENTER to accept the new setting will be displayed Note Pressing MENU instead of ENTER leaves the latching relay setting unchanged Press the MENU button to ...

Page 39: ...sword Edit Off Press the button to select either On or Off Press ENTER to accept the setting Note Pressing MENU instead of ENTER leaves the unit without change Press the MENU button to exit the hysteresis option menu On exit the display will show if no changes have been made or if changes have been made Note if the password is in operation then the user will be prompted to enter the Password when ...

Page 40: ... ENTER The display shows Password Edit Press the 1 2 or 3 buttons to set the desired password Press MENU to exit the edit window The display shows Password Exit 123 Press ENTER to store the changes Note 1 Pressing MENU instead of ENTER leaves the unit without change Note 2 Pressing ENTER when the password is blank will result in the password being 0 and as such that the user can effectively by pas...

Page 41: ...STATUS SCIENTIFIC CONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 40 ...

Page 42: ...mmsData ModbusData Press MENU to close the menu system Select the desired option via the UP DOWN keys and press ENTER 9 1 12 1 LiveData Consists of Several pages of data for IR sensors Each page is displayed automatically for several seconds The displayed values are as follows Screen1 IR Diagnostics 1 Exit Reading Temperature Det1 Ref Fa1 0 0 34 6 2792 1137 0 002 0 Reading is the computed gas read...

Page 43: ...ff Uptime 18078 LiveDataVer 7 Status 4 Status bits as defined for the displayed LiveData version Uptime Number of seconds power has been applied to the IR sensor LivedataVer version of livedata structure used in the IR sensor For more details on data structures and status bit please refer to the latest version of TDS0045 Premier Sensor Communications Protocol For non IR sensors there is just one d...

Page 44: ...STATUS SCIENTIFIC CONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 43 Sensor Span is the calculated span factor for the sensor ...

Page 45: ...ives the total number of alarm events since the FGD10AM was powered up The counter can only be reset by cycling the power supply to the FGD10AM For further information on config data refer to 9 1 12 3 CommsData This option is primarily for use by SSCL in diagnosing any possible comms issues with Dynament IR sensors In summary P2Psuccess shows the number of successful requests serviced by the IR se...

Page 46: ...STATUS SCIENTIFIC CONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 45 ...

Page 47: ...Diagnostics 2 Exit Select Display LEL and CF Test Relays Cycling pages of all the IR flammable gases with correction factor and Lel is displayed via a table e g Page 1 only is shown here Diagnostics 2 Menu Exit GAS CF Lel Methane 5 0 Propane 2 0 Butane 0 97 1 6 Chloromethane 4 97 8 1 Cyclopentane 1 62 1 1 9 1 12 5 Test Relays Each relay may be selected in turn for testing Press ENTER to momentaril...

Page 48: ...splayed parameters are as follows for received data only by the FGD10AM from the Modbus master controller All values in are in hex Diagnostics 1 Exit Slaveaddr 01 03 Command Register ChecksumL ChecksumH 0064 d5 c5 Slaveaddr Modbus node address of target FGD10AM e g 01 Command Modbus command e g 03 Read holding register Register Target register to read e g 64H 100d ChecksumH High order byte of CRC ...

Page 49: ...ss ENTER Hysteresis Edit Use the button to select an individual digit or the sign the use the button to change the to a and the digit to 0 through 9 continue for all digits until the desired alarm set point is set Press ENTER to accept the new hysteresis level will be displayed Note Pressing MENU instead of ENTER leaves the hysteresis level unchanged Press the MENU button to exit the hysteresis op...

Page 50: ...isplay Edit Press ENTER to accept the new alarm level will be displayed Note Pressing MENU instead of ENTER leaves the display setting unchanged Press the MENU button to exit the display option menu On exit the display will show if no changes have been made or if changes have been made Note that when the sensor type is first selected the optimum number of decimal places for a given sensor type and...

Page 51: ...sing the buttons to select the desired sensor type see list below Press ENTER to accept the new sensor type will be displayed Note Pressing MENU instead of ENTER leaves the display setting unchanged Press the MENU button to exit the display option menu On exit the display will show if no changes have been made or if changes have been made The available types are as follows Infrared Pellistor Oxyge...

Page 52: ...ime Edit Use the button to select an individual digit or the sign the use the button to change the to a and the digit to 0 through 9 continue for all digits until the desired alarm set point is set Press ENTER to accept the new hysteresis level will be displayed Note Pressing MENU instead of ENTER leaves the hysteresis level unchanged Press the MENU button to exit the hysteresis option menu On exi...

Page 53: ...ks readings above zero The setting can be set between 0 and 10 of the sensor range as set by the FSD value From the menu system select menu option Pos Zero or Neg Zero and press ENTER The following screen will be displayed Neg Suppression Edit Pos Suppression Edit Using the buttons increase or decrease the reading to the required value Press ENTER to accept the new alarm level will be displayed No...

Page 54: ...button rather than the ENTER button exits without any change Press the MENU button to exit the sensor type option menu On exit the display will show if no changes have been made or if changes have been made The available types displayed depend on the type of sensor fitted as follows IR sensor TOXIC sensor PELLISTOR OXYGEN Carbon dioxide Ammonia Hydrogen Oxygen Flammable Carbon monoxide Methane Chl...

Page 55: ...Chloromethane 4 97 8 1 Cyclopentane 1 62 1 1 Ethane 1 01 3 0 Ethanol 1 95 3 0 Ethylene Oxide 3 43 2 7 Ethylene 0 845 3 6 Hexane 0 80 1 1 Pentane 0 89 1 4 Propylene 1 69 2 4 Toluene 1 16 1 2 Xylene 1 32 1 0 User Defined 1 0 1 0 This provides measurement of flammable gases corrected with respect to the propane IR channel Note SSCL adopts the default propane LEL of 2 0 For example if chloromethane is...

Page 56: ...STATUS SCIENTIFIC CONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 55 Set Default LEL and correction factors ...

Page 57: ...match the sensor fitted Available options are no bias 250 mV and 300 mV bias The normal level is 0 no bias 9 1 20 Gain Setting Toxic Sensor only Gain Setting Exit POT VAL 5 28 READING Allows adjustment of the electronic gain potentiometer of the Toxic sensor electronics Use the keys to change the potentiometer setting Press ENTER to accept the new setting will be displayed The sensor reading is al...

Page 58: ... ENTER The following screen will be displayed Sensor Units Exit LEL Using the buttons select the desired units see list below Press ENTER to accept the new sensor type will be displayed Note Pressing the MENU button rather than the ENTER button exits without any change Press the MENU button to exit the sensor type option menu On exit the display will show if no changes have been made or if changes...

Page 59: ...dividual digit or the then use the button to change digits continue for all digits until the desired date time is set Press ENTER to accept the new time will be displayed this will synchronise the time to the selected seconds Note Pressing MENU instead of ENTER leaves the date time unchanged Use the button to select the cal box if the RTC is running fast or slow Use the button to subtract or add t...

Page 60: ...of parameter measured by the sensor From the menu system select menu option Screen Saver and press ENTER The following screen will be displayed Screen Saver Edit Enabled Time min Yes 10 Use the button to select Enabled or Time then use the button to change the readings continue for all digits until the desired date time is set Press ENTER to accept the new settings will be displayed this will sync...

Page 61: ...cessible if an IR sensor is fitted and Flammable is selected from the Sensor Type menu See menu description Set Sensor Type Set Flammable Gas Edit Methane Note If the Flammable gas option is has not been previously selected e g Carbon dioxide from the Sensor Type menu then the following warning message will appear and no changes will be allowed Menu No change SELECT FLAMMABLE SENSOR TYPE FIRST ...

Page 62: ...pane IR channel Set Flammable Gas Edit Methane Use the keys Select the desired flammable gas and select ENTER The current LEL is then displayed above the gas name Set Flammable Gas Edit Methane 5 00 Use the keys to change the digit Select the next digit using the keys Press ENTER to accept the new value will be displayed Note Pressing MENU instead of ENTER leaves the settings unchanged Press the M...

Page 63: ...ayed above the gas name SetFlam Correction Edit Chloromethane 4 97 Use the keys to change the digit Select the next digit using the keys Press ENTER to accept the new value will be displayed Note Pressing MENU instead of ENTER leaves the settings unchanged Press the MENU button to exit the sensor type option menu On exit the display will show if no changes have been made or if changes have been ma...

Page 64: ...CHANGE As stated on the screen selecting MENU will exit without any changes Selecting ENTER key will reset all propane correction factors and LEL settings to their factory set default values These will be displayed on a series of screens that update consecutively every few seconds Screen 1 Screen 2 Default LEL CF Data updated GAS CF Lel Methane 5 0 Propane 2 0 Butane 0 97 1 6 Chloromethane 4 97 8 ...

Page 65: ...ia the Modbus protocol The Modbus node address must be set via the Menu option Note For safety reasons the FGD10AM will NOT respond to Modbus commands while in Menu mode If the FDG10AM is left accidentally left in menu mode it will time out after several minutes and Modbus communications will be re established Modbus ISO IEC 7498 1 Physical layer description EIA RS485 9600 BAUD 8 data bits 1 start...

Page 66: ...loating point number RTC Real Time Clock Modbus register notation The memory map used is the read holding register map command 0x03H Starting from logical address 40001 This corresponds to physical address 0x0000 More detailed examples are given below Some registers e g gas reading are read only Other registers have full read write access Zero and span are achieved by writing any value to the appr...

Page 67: ... g 0x00c8 200 20 LEL 40027 R W uINT16 FSD range e g 0x0014 100 40101 R uINT16 Sensor Type LSB holds instrument Modbus address MSB holds 0x04 for TOX 0x05 for Oxygen 0x07 Pellistor Catalytic 0x13 for NDIR sensor 40102 R INT16 GAS READING identical to 40001 40103 R uINT16 GAS TYPE and Decimal Places Ammonia 0x0d Butane 0x16 Flammable Carbon Monoxide 0x01 Carbon Dioxide 0x20 Chlorine 0x05 Ethane 0x16...

Page 68: ...zone 0x23 Pentane 0x16 Flammable Phosphene 0x24 Propane 0x16 Flammable Sulphur Dioxide 0x03 Toluene 0x16 Flammable VOC 0x25 default 0xff 40106 R uINT16 Operating mode 0x0001 Normal 0x0003 warm up Note no Modbus response in menu mode 40107 R uINT16 Bit 1 Alarm2 active Bit 0 Alarm1 active Note all gases on the flammable list return value 0x16 ...

Page 69: ...2013 40119 R W uINT16 RTC hhmm MSB hour e g 0x0A for 10am LSB minutes e g 0x3B for 59 mins 40124 R W INT16 ALARM1 Level x10 see 40022 40125 R W INT16 ALARM2 Level x10 see 40023 40126 R W INT16 Gas Calibration Level see 40011 40152 W uINT16 SPAN SENSOR Write any value to this register to span the sensor according to the Gas Calibration Level 40154 W uINT16 ZERO SENSOR write any value to this regist...

Page 70: ...STATUS SCIENTIFIC CONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 69 ...

Page 71: ...ficant 16 bits of IEEE574 floating point value 40226 R W LSFP16 ALARM1 Level Float Least significant 16 bits of IEEE574 floating point value 40227 R W MSFP16 ALARM2 Level Float Most significant 16 bits of IEEE574 floating point value 40228 R W LSFP16 ALARM2 Level Float Least significant 16 bits of IEEE574 floating point value 40229 R W MSFP16 ALARM3 Level Float Most significant 16 bits of IEEE574 ...

Page 72: ...0251 R W uINT16 RTC Seconds e g 0x002F 47 40252 R W uINT16 RTC Minutes e g 0x001C 28 40253 R W uINT16 RTC Hours e g 0x000D 1 pm 40254 R uINT16 RTC Weekday not yet implemented 40255 R W uINT16 RTC Day e g 0x0013 19th 40256 R W uINT16 RTC Month e g 0x0006 June 40257 R W uINT16 RTC Year e g 0x000D 2013 40301 R uINT16 Alarm1 Year The year the most recent alarm1 occurred e g 0x000D 2013 40302 R uINT16 ...

Page 73: ...0310 R uINT16 Alarm2 Hours The hour the most recent alarm2 occurred e g 0x000D 1 pm 40311 R uINT16 Alarm2 Minutes The minute the most recent alarm2 occurred e g 0x001C 28 Note When Alarm level values are changed the corresponding time date event register is set to zero LOGICAL ADDRESS R W DATA TYPE DESCRIPTION 40312 R uINT16 Alarm2 Seconds The second the most recent alarm2 occurred e g 0x002F 47 4...

Page 74: ... 0x001C 28 40324 R uINT16 Span Seconds The second the instrument was last Spanned e g 0x002F 47 40325 R uINT16 Span Year The year the instrument was last Spanned e g 0x000D 2013 40326 R uINT16 Span Month The month the instrument was last Spanned e g 0x0006 June 40327 R uINT16 Span Day The day the instrument was last Spanned e g 0x0013 19th 40328 R uINT16 Span Hours The hour the instrument was last...

Page 75: ...er values 0 M2 101 50 D300 K0 ADPRW H1 H3 D302 K1 D0 M8029 SET M2 Explanation PLC register D300 is assigned as the step control register The value here determines which part of the overall ladder sequence is executed in which order In this case Read gas level was assigned a step sequence value of 0 k0 in FX3U syntax Flag M2 is assigned as Modbus command in progress ADPRW is the special Modbus read...

Page 76: ...the Modbus memory map equates to holding register physical address 0 D0 is the PLC register assigned to hold the gas level reading 50 LEL The ADPRW command automatically takes care of CRC generation and checking In terms of a conventional Modbus packet sent to the FGD10AM this would look like Slave address Function command Target Register Number of registers CRC checksum 0x01 0x03 0x00 0x65 0x00 0...

Page 77: ...ecalcChksum checksum to be recalculated unsigned integer uiMBTemp unsigned char ucLoop1 unsigned char ucLoop2 uiRecalcChksum 0xFFFF Load CRC reg with FFFF for ucLoop1 0 ucLoop1 ucMsgLength ucLoop1 uiRecalcChksum uiRecalcChksum aucModbusRxBuffer ucLoop1 XOR 1st byte of msg with LSbyte of CRCreg and put result in CRCreg for ucLoop2 0 ucLoop2 7 ucLoop2 uiMBTemp uiRecalcChksum 0x0001 mask off LSB if u...

Page 78: ...1 10 3 4 Example 4 Write Calibration gas level to Modbus register 40126 Mitsubishi FX3U PLC ladder diagram Flag M98 is set to trigger the write process which is then reset automatically by M8029 Once the write command is completed D300 controls the ladder sequence H1 is the Modbus device node address H6 is the write single register command D302 contains the logical address of the Modbus register t...

Page 79: ... Modbus node address to Zero or Span Alternatively Zero and span may done manually via the Menu display on the front of the instrument 10 5 Wiring Use shielded twisted pair cables for connecting communication equipment operating in accordance with MODBUS RS 485 Typical characteristics for RS485 cable are listed below Cable type Shielded cable Conductor resistance 20 C 88 0 Ω km or less Insulation ...

Page 80: ...7 when using a 30 CH4 test gas This reading should be retained for future reference as it can provide an indication of the health of the sinter flame arrestor This is situated in the base of sensor housing and it is through this device that the gas passes in order to reach the sensor itself If necessary carry out adjustment of the span setting as described in section 9 1 3 Carrying out the above p...

Page 81: ...ONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 80 12 SENSOR REPLACEMENT 12 1 Infrared sensor Step1 Remove the grub screw in an anti clockwise direction ...

Page 82: ...TUS SCIENTIFIC CONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 81 Step2 Turn cover securing stud anti clockwise to allow cover to open ...

Page 83: ...STATUS SCIENTIFIC CONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 82 Step 3 Remove the sensor by pulling downwards ...

Page 84: ...IENTIFIC CONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 83 Step 4 Carefully locate the pins in the sockets then push the new sensor upwards ...

Page 85: ...IC CONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 84 Step 5 Replace the sensor housing by rotating in a clockwise direction untill fully tightened ...

Page 86: ... SCIENTIFIC CONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 85 Step 6 Rotate the grub screw in a clockwise direction until fully tightened ...

Page 87: ... Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 86 12 2 Oxygen Toxic sensor Step1 Turn cover securing stud anti clockwise to allow cover to open Step 2 Remove cover by rotating anti clockwise ...

Page 88: ...D10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 87 Step 3 Remove display board which can be left to dangle on its retaining wire Remove PCBs from the support pillars and the datamate cable from the board left in the enclosure Step 4 Remove wires from terminal block ...

Page 89: ...US SCIENTIFIC CONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 88 Step 5 Remove sensor insert from FGD10A enclosure using extraction tool ...

Page 90: ...ommissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 89 Step 6 Separate the two sensor insert components Once separated remove old sensor and replace with a new sensor and mate the two component parts ...

Page 91: ...ssioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 90 Step 7 Apply Loctite 243 or a compound equal strength to the threads Insert the sensor housing into the FGD10A enclosure using the insertion tool Loctite ...

Page 92: ... SCIENTIFIC CONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 91 Step 8 Terminate the wires dependIing on which type of gas sensor is fitted ...

Page 93: ...nstallation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 92 Step 9 Fix datamate cable the boards removed from the support pillars and finally the display board back into position ...

Page 94: ...CONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 93 Step 10 Replace cover and fully tighten Step 11 Turn the cover securing stud clockwise until secure ...

Page 95: ... FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 94 12 3 Flammable Pellistor sensor To order a replacement pellistor sensor quote Stock No SS294 Step1 Turn cover securing stud anti clockwise to allow cover to open Step 2 Remove cover by rotating anti clockwise ...

Page 96: ... Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 95 Step 3 Remove the display board which can be left to dangle on its retaining wire Remove the PCBs from the support pillars and the ribbon cable from the board remaining in the enclosure ...

Page 97: ...llation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 96 Step 4 Remove the flammable pellistor sensor board from the rear of the sensor do not disconnect the wires from the main board ...

Page 98: ...STATUS SCIENTIFIC CONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 97 Step 5 Remove sensor insert using extraction tool ...

Page 99: ...oning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 98 Step 6 Mark the sensor pin position undo the circlip that retains the sensor in its housing Step 7 Replace the sensor taking note of the pin marking in step 6 ...

Page 100: ...ssioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 99 Step 8 Apply Loctite 243 or a compound equal strength to the threads Insert the sensor housing into the FGD10A enclosure using the insertion tool Loctite ...

Page 101: ...STATUS SCIENTIFIC CONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 100 Step 9 Fix the pellistor sensor board back into postion ...

Page 102: ...nstallation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 101 Step 10 Fix ribbon cable the boards removed from the support pillars and finally the display board back into position ...

Page 103: ...ONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 102 Step 10 Replace cover and fully tighten Step 11 Turn the cover securing stud clockwise until secure ...

Page 104: ...OFF the supply to the FGD10A M 2 Release the grub screw located near the lip of the enclosure cover Note It is not necessary to remove the grub screw to release the enclosure front cover 3 Remove the enclosure front cover by rotating it several times in an anti clockwise direction 4 Unplug the display board from within the enclosure 5 Remove the 3 screws located around the edge of the next board 6...

Page 105: ...ic oxygen version Oxygen Toxic Input voltage 8 to 24 volts dc Input power 5 Watts maximum Internal fuse 1 Amp antisurge Nanofuse Analogue output 4 to 20mA 10 bit resolution Relays Relay 1 Alarm 1 Relay 2 Alarm 2 Relay 3 Fault Contact Rating 300Vac 3 Amps Non inductive load RS485 output Not available on this version Sensor type NDIR Infrared Measurement range 0 100 LEL 5 vol CH4 or 0 100 volume CH4...

Page 106: ...ommissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 105 15 DIMENSIONS 15 1 Oxygen Toxic Pellistor versions Maximum Depth 127mm Optional Weatherguard 115 126 Centres 190 136 2 x 7mm dia mounting holes ...

Page 107: ...Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 106 15 2 Infrared versions Optional Weatherguard 115 126 Centres 250 190 2 x 7mm dia mounting holes Maximum Depth 127mm ...

Page 108: ...ons of Safe Use 1 The gap between the SI IR sensor and its housing in the gas detector is 0 11mm maximum and should not be enlarged during maintenance etc 2 Only Loctite 243 or a compound equal strength shall be re applied to the threads of the type SI M sensor after replacing the sensing element 3 The SI IR sensors shall not be installed or removed when an explosive gas atmosphere is present WARN...

Page 109: ...y 8Vdc to 24Vdc 5W Relay contact rating 300Vac 3 Amps Installation instructions The cable entry devices and blanking elements of unused apertures shall be of a certified flameproof type suitable for the conditions of use and correctly installed With the use of conduit a suitable certified sealing device such as a stopping box with compound shall be provided immediately at the entrance to the flame...

Page 110: ...STATUS SCIENTIFIC CONTROLS Installation Commissioning Routine Gas Testing FGD10A M Gas Detector TD18 032 Issue 10 Change Note 1869 Page 109 CUSTOMER NOTES ...

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