Series 256 User Manual Contents
Contents
1. 4 5 Cooling rate Use this display to set the profile cooling rate in degrees per hour This is the rate at which the profile setpoint reduces from the soak temperature to the desired end temperature If the profiler is currently running the el 90 deg Hr cooling ramp this change will take affect immediately Enter a rate of zero if you require to step change the lea race dale setpoint to the end temperature Use E for more COOLI NG RATE Press button 4 to return to Profiler Overview display If no buttons are pressed for 20 seconds then the display will revert back to the Profiler Overview 4 6 End temperature Use this display to set the profile ending temperature in degrees This is the temperature at which the cooling ramp terminates and the profiler returns to its ready state If the profiler is currently running the cooling ramp and this value is increased above the current profile setpoint the profile will end immediately Use to change val ue Use Af or more END TEMPERATURE End at 1 0 0 Degrees Press button 5 to return to Profiler Overview display If no buttons are pressed for 20 seconds then the display will revert back to the Profiler Overview 4 7 Profile start stop control Use this display to start or stop the profiler START STOP CONTROL If the profiler is currently running then press the down button to stop the profiler and return it to the ready state Profiler is RUNNI NG Use Wto STOP Us2. and generate a time proportioning output with a cycle time of 20 seconds 2 2 Operation of profile generator The profile generator is used to generate the setpoint time temperature profile Each profile consists of four distinct stages 2 2 1 Normal profile operation Temperature Soak Level i _ Soak Time y l l End Temp Hottest Zone Temp SOAK READY COOLING READY HEATING Ready Stage The profile generator is not running and the temperature setpoint is maintained at zero Heating Stage When the profile is started the temperature setpoint is ramped from the current zone hottest temperature up to the soak temperature at the specified rate Soak Stage The temperature setpoint is maintained at the soak temperature for the specified soak time Cooling Stage The temperature setpoint is ramped downwards from the soak temperature at the specified cooling rate until it reaches the End temperature At this point the profile ends and the profile generator returns to the Ready stage 2 2 2 The affect of Holds The operation of the profile generator may be modified by the use of Holds A Hold comes into affect if any zone temperature deviates from setpoint by more than the current Hold Band setting M53 Issue 0 5 Page 12 Series 256 User Manual When the profile generator is in Hold both the profile setpoint and profile time base are frozen for the duration of the Hold This effec
3. by the 256 instrument Read transactions requests for data from the 256 or write transactions data sent to the 256 5 2 1 Read transactions Read transactions are used to acquire data from the 256 and consist of messages of the following general form RAAPSS lt CR gt Where R Read message header ASCII code 52h AA Instrument address P Parameter code SS Secondary parameter code lt CR gt Message terminator ASCII code ODh Messages to the instrument may include spaces or linefeeds if required These will be ignored Messages from the instrument will not contain either linefeeds or spaces M53 Issue 0 5 Series 256 User Manual Page 19 5 2 2 Write transactions Write transactions are used to write data into the 256 and consist of messages of the following general form WAAPSSD D lt CR gt Where W Read message header ASCII code 57h AA Instrument address P Parameter code SS Secondary parameter code D D Data to write lt CR gt Message terminator ASCII code ODh Messages to the instrument may include spaces or linefeeds if required These will be ignored Messages from the instrument will not contain either linefeeds or spaces 5 2 3 Instrument address Each instrument must be given a unique address between 00 and 39 This address is set on the configuration DIL switch see section 1 3 The address field of the message consists of two ASCII numerals and determines to which instrument the mes
4. slave controller Move the switch to the P256 position to specify that the instrument is a profiler and controller 1 3 2 P256 Programmer DIL Switch meanings Hold Type Temp Units Trim amp Clamp Hold Band Comms Address Rates Below setpoint only Rates Above and below setpoint Rates and Soaks Below setpoint only Rates and Soaks Above and below setpoint Switch 3 is used to select the temperature units required Ssw3 Temperature Units Degrees Celsius Degrees Fahrenheit Switch 4 is used to select whether or not the operator is allowed to apply trims and clamps to the setpoint value Trim and Clamp Trim and clamp Disabled Trim and clamp Enabled Switches 5 and 6 set the unit s hold band in multiples of the unit s prop band Xp as follows M53 Issue 0 5 Page 8 Series 256 User Manual Note that the Hold band is defined as the maximum temperature difference between the controller s set point and temperature that is allowed before the profiler goes into a hold condition Thus if the set point is 300 prop band is 10 Hold band is twice and both above and below hold is set then Hold occurs whenever the temperature is less than 280 or greater than 320 If the temperature is between 280 and 320 then no hold will occur SW5 SW6 Hold Band 1 3 3 256 Controller DIL switch meanings Degrees C F Unit Address No of controllers 2 i Address PERREEEE 1234567 8 ON y Sw
5. FOH User Manual Series 256 Programmer And 6 channel Controller FGH Controls Ltd Blackhorse Rd Letchworth Herts SG6 1HN England Tel 44 0 1462 686677 Fax 44 0 1462 671860 Series 256 User Manual Page 1 Series 256 User Manual Contents 1 ISTMO ac ee a see ee Reese 2 Veh IR A er ee ee E ee 2 liz JBIE ICAl SON CEA ee ee 2 e A e A 3 PAR o gg TO a eat cee hea tet ie uta Ae cetet ots ae het ag oer ee ec eee seats 3 1 I eum 8 1 6 8 Sn eee eee Pee er erg eee e A 4 1 2 4 Sena COMMUNICA IONS a e arde do nates 4 197 WS Cho WING UENO S rl iros o eat los 7 ESA Programmen Controller switch ansehen 7 1 3 2 P256 Programmer DIL Switch MEANINGS ccccceecccescceececeececeueecueeceueecsucesuueeseescaeessueessueeseueeseeeeaes 7 1 3 3 S256 Controller DIL switch MEANINGS zccshe5t ac esess iste u en 8 122 A a o ae ee ren 9 1 4 1 Thermocouple break detection 2 2s0024002000000000nnno nenne nnnnnnnn anne nenne nenne nnnnnnnnn nenne nnnnennnnnnnnnnnnnenn 9 2 ODBeration ai 10 20 A A E E 10 22 Operati onoT COME OMS asst cease Steg costae ines eas A O E 10 2 2 Operation of profile GEMCratOlac xoici cil ohs uelG a bales iecah and Samadio Scum ans een dod ge ne else 11 2 2 1 e a en en a SE TER ee ee ee 11 2272 DS Sec OM Ode ee A 11 223 SUPPLY Tall res o ee ea 12 3 Controller displays un ec 12 O A A a fae eats ee Be ee Be he eee es 13 A A 14 9 3 ES A O A agate eeeas 14 O o A ee
6. LLER 1 Auto S P Trim 20 M53 Issue 0 5 Series 256 User Manual Page 15 Alternatively press the button corresponding to the controller number to advance to the Setpoint Clamp display If no buttons are pressed for 20 seconds then the display will revert back to the Controller Overview 3 5 Setpoint clamp Use this display to apply a high limit to the setpoint used by this zone controller in automatic mode This clamp will limit the maximum control temperature for this zone The clamp facility is only affective if the zone controller is Auto S P ciam 1000 in automatic mode and the setpoint clamp facility is enabled on the DIL switch CONTROLLER 1 Use Yto change val ue Alternatively press the button corresponding to the Use for more controller number to advance to the Controller Overview display If no buttons are pressed for 20 seconds then the display will automatically revert back to the Controller Overview 4 Profiler displays The diagram below shows the relationship between each of the displays in the profiler Controller Overview y E M El FAST Heating S F FAST Cooling 1 Heating Soak EA EN Rate Time EA EN The user moves between each display by pressing one of the buttons The instrument will emit a short beep every time a button is pressed 4 1 Profiler overview The profiler overview display is used to monitor and set up the operation of the profile generator by
7. M53 Issue 0 5 Series 256 User Manual Page 21 5 zone 6 in Hold for example the number 6 indicates that zones 2 and 3 are in hold Parameter O controller setpoint type This parameter returns O for controller in manual setpoint 1 for controller in automatic setpoint Parameter Q01 profiler status This parameter returns a number with the following bit meanings Number Meaning 0 Ready 1 Servo starting 2 Heating 4 Soaking 8 Cooling Parameter Q11 profiler hold status This parameter returns O for profiler NOT in hold 1 for profiler in Hold 5 4 Error message responses Commands to the P256 other than broadcast commands that contain an error or cannot be understood result in an error reply of the general form AAEF lt CR gt Where Message header ASCII code 3Fh AA Address of the replying instrument E Character fault error code F Message fault error code lt CR gt Message terminator ASCII code ODh Character error codes Field E is a single ASCII hexadecimal number who s binary weighting indicates the type of character corruption that may have given rise to the error BIT MEANING 3 break in transmission 2 parity error 1 framing error 0 receiver over run error Message error codes Field F is a single ASCII hexadecimal number who s binary weighting indicates the type of message fault that may have given rise to the error BIT MEANING 3 Illegal header 2 Illegal parameter code or number 1 Il
8. ally connected to the metal case of the instrument 1 2 2 Sensors Connect the thermocouple sensors to the 13 way terminal block These should be wired in either compensating or extension cable appropriate to the type of thermocouple used As standard the 256 series instruments use Type K thermocouples The colour codes for type K are given in the table below The Earth terminal should be connected to a solid chassis earth point to provide the Zone 1TC best immunity to electrical noise Type K Thermocouple International Colour Codes Zone 2TC International FE Zone 3TC Sheath Zone 4TC American ANSI MC96 1 ee i Zone 5 TC Sheath British Red Positive Zone 6 TC BS 1843 1981 Earth M53 Issue 0 5 Page 4 Series 256 User Manual 1 23 Outputs Common The 6 zone controller outputs and the reverse Zone 1 O P thermocouple alarm output should be wired to the 9 way Zone 2 O P connector Each output consists of a normally open relay Zone 3 O P contact rated at 0 5A RMS at 253V maximum into a Zone 4 OJP resistive load Zone 5 O P Warning o l l Zone 6 O P Each relay is internally fitted with a CR arc suppression Rev TC Al device which will result in a small residual current flow Not Used approx 4mA at 250V when the contact is open This small current may result in very light loads failing to switch off If this is the case DO NOT remove the internal arc suppression devices A 10K 10W resistor should be c
9. d twisted pair cable The cable screen should be earthed at one point only The cable should be routed well away from sources of electrical noise such as motors contactors and any other high voltage wiring The network should be wired as a daisy chain taking the wires into one instrument and hence on to the next Wiring spurs should be avoided Take care to continue the cable screen on to the next instrument For long cable runs or noisy environments it may be necessary to fit a terminating resistor to the network The terminator a 2000 resistor should be fitted between RX and RX on both the computer and the furthest instrument For two wire networks this resistor should be fitted at the computer end only Only one such terminator should be fitted on each wire pair 4 Wire Connection to host computer Host Computer Terminating Resistor Optional Series 256 Host Port Series 256 Host Port M53 Issue 0 5 Page 6 Series 256 User Manual The above diagram shows the connections for 4 wire RS422 operation This method of connection uses a separate pair of wires for transmission and reception and is the preferred connection method Although called the 4 wire connection a fifth common wire is shown on the diagram This wire should be fitted if at all possible 2 Wire connection to host computer Terminating Resistor Optional Series 256 Host Computer Host Port Series 256 Host Port The above diagram show
10. e Mlfor more START STOP CONTROL If the profiler is ready not running then press the up Profileris READY button to start the profile Use Ato START Use Mlfor more M53 Issue 0 5 Page 18 Series 256 User Manual Press button 6 to return to Profiler Overview display If no buttons are pressed for 20 seconds then the display will revert back to the Profiler Overview 5 Serial communications The unit has 2 serial communications channels The local communications port is used solely for communications between series 256 devices and is not available for use by the user The host port however is available to the user and this section provides the details required to implement successful data communications between instrument and PC 5 1 Data format Communications may be performed in either 2 wire RS485 or 4 wire RS422 standards Both modes are half duplex only The data format and Baud rate are fixed as follows Baud Rate 9600 Start bits 1 Word length 7 bits Parity Odd Stop bits 1 5 2 Message structure All series 256 instruments act as slave devices This means that an instrument will not itself initiate a transaction it merely responds to transaction requests initiated by a host computer or other similar device Messages consist entirely of printable ASCII characters so transaction data may be conveniently tested or monitored using any terminal device There are two types of transaction which are supported
11. e eee ie eee ener eee 14 9 3 2 DEIDOMNEC IT O a Seen E Se cue ne 15 4 Profiler displays nui lit ld 15 4 1 Prone roven W a ae ai beet ie ace ieee cla 15 2 2 Healing raten einerseits 16 4 3 SOAK Temperallfe rss ersehen 16 4 2 25 A on O A A 16 AS COOMMG Tal ci A sa 17 460 EN ee ar ee aan 17 Af PrO Stary STORICORILO piae ee sen nee een ee neigen neue 17 5 Serial COMMUNICANMONS Sasien a ai erde 18 9 1 Dala TOMA ranna a nee ee 18 9 2 Message Struct Gaas Ne ee ee 18 9 2 1 Read transaclionssaserse nee oe A 18 9 22 WIE Hansa cios 1 q ee een dene 19 9 23 ISTMO A AOS St roda ee 19 5 2 4 Parameter code and os field ic iio 19 O An O o O o A 20 0 39 Normal message FOS PONS Si en ee ee ee ee ee 20 9 2 Eror Message response Sesiinae iia 21 6 SDPECIHICALONS He A Da nn ee aa a ream en 22 SA A ce nO RS PD een ee 22 OZ CONTON S ze re a ve ational aampea ce vein Sanaa ena cas ete E 22 o ee nee ed ren ee 23 M53 Issue 0 5 Page 2 Series 256 User Manual 1 Installation 1 1 Panel Mounting The instrument will fit into a DIN standard 92mm x 92mm 0 8mm 0 square cut out and will accommodate a panel thickness up to 7mm RM 16mm in 152mm HJ The instrument projects behind the panel by less than 152mm including terminal connections If IP65 sealing is required then ensure that the panel sealing gasket is fitted into position behind the bezel The gasket may be omitted If IP65 sealing is not required Unscrew the two instrum
12. ent mounting screws on the bezel until the two retaining ears are near their rearmost positions Whilst holding the retaining ears retracted within the recesses fit the instrument Mounting into the panel cut out Hold the instrument in place and gently Screws tighten the two mounting screws on the front of the instrument until the gasket is compressed and the instrument is firmly retained in the panel DO NOT OVER TIGHTEN THE SCREWS Additional measures will be required to seal multiple instruments if 5mm min 92mm 0 8 0 Panel Cutout u mm ar they are mounted in a common slot These measures may consist of sealing compound or other devices at the discretion of the installer 1 2 Electrical Connections M53 Issue 0 5 Series 256 User Manual Page 3 All electrical connections are made to the rear of the instrument via screw terminal blocks Each terminal block plugs into a receptacle in the rear of the instrument and may be unplugged to allow easy wiring and to withdraw the instrument from the panel FGH Controls Ltd Made in England ak Ea Thermocouple Inputs Ls 51010101030 Outputs 253V 0 5A RMS Resistive T 1 2 1 Supply Mains power should be connected to the three way mains terminal block The instrument will accept 95 to 253 V RMS at Earth 50 to 60Hz and consumes approx 6VA A good earth Neutral connection is essential for safety and screening purposes and Line this is intern
13. ent zone Too Cold Too Hot temperature and the setpoint The bargraph is scaled ABS AO 50 0 50 4109 50 15 to 15 degrees from left to right with zero error in the ia A centre The graph is shaded from the centre outwards Shading on the right hand side means that the zone is C 8 error indicated M53 Issue 0 5 Page 14 Series 256 User Manual too hot Shading on the left means that the zone is too cold If the profiler is running and a zone has caused the profiler to go into hold then that zone temperature will be displayed flashing alternatively with the word Hold To display the current zone setpoints press and hold the up button While the button is depressed the displayed zone temperatures will be replaced with the current zone setpoints Release the button and the display will return to normal Press the down button to monitor the profiler via the Profiler Overview display The setup parameters for each zone controller may be accessed by pressing the button corresponding to the controller number For example press the button 3 to access controller 3 and so on 3 2 Manual setpoint A zone controller may be in either automatic or manual modes In automatic the zone controller uses the setpoint generated by the profiler In manual mode the controller uses a static setpoint entered by the operator Ma nuai srpa 15 Use the up and down buttons to enter the required manual setpoint in degrees CONTROLLER 1 Use Yt
14. etection is switched off a broken thermocouple will not be detected and its reading will float Use the jumper link on the Input board to enable or disable thermocouple break detection as required Thermocouple Break Detection Bu or OE on M53 Issue 0 5 Page 10 Series 256 User Manual 2 Operation 2 0 General The P256 operates as a self contained 3 segment profile generator and 6 identical zone controllers The S256 has only the 6 zone controllers Both have a reverse TC alarm feature that turns off a zone and closes relay A if heat is applied to an accidentally reversed TC P256 Profile Reverse Generator TC Alarm ee ee m en Zu a un en TC OP TC OP TC OP TG OP E OP TC OP Alarm Zone 1 Zone 2 Zone 3 Zone 4 Zone 5 Zone 6 OP 2 1 Operation of controller There are 6 controllers available in every Series 256 instrument Each controller can operate in Automatic or Manual modes Automatic Mode The controller uses the setpoint from the profile generator The operator may apply a local trim to this setpoint and specify a high setpoint limit clamp The trim and clamp facilities can be disabled if required using DIL switch 4 Profile Setpoint Zone TC Zone Output M53 Issue 0 5 Series 256 User Manual Page 11 Manual Mode The controller uses a fixed manual setpoint entered by the operator All controllers operate in proportional only mode using a fixed proportional band setting of 10 C 18 F
15. ey Noryl SE1 96 x96 to DIN 43700 92 0 8 0 square Zinc plated sheet steel 152 including terminals 2 part 5 08 pitch for up to 14 AWG Polycarbonate Graphic LCD panel 128 x 64 pixels Continuous yellow green LED 8 off blue green silicone rubber 2 off M3 screws allowing withdrawal of entire unit from front of panel Approx 800g Front IP65 Rear IPOO BS EN 61010 1 Il 2 BS EN 50081 2 BS EN 50082 2 2 off RS422 RS485 95 253 V rms 48 62 Hz lt 10VA Operating 0 60 C 5 95 rh non condensing Storage 10 65 C 5 95 rh non condensing All controllers share the following common parameters Sensor Units M53 Issue 0 5 K to BS EN 60584 1 others by special order Degrees C or F Series 256 User Manual Page 23 Resolution Measurement 0 1 degrees Display 1 0 degree Sampling Every 0 735 seconds Isolation 100 V sensor sensor 100 V sensor earth Break detection Up scale sensor current 100 nA Prop band 10 degrees C 18 degrees F TP cycle time 20 seconds Hold band 1 2 or 3 times prop band Hold type Below only or above and below TP output 1 form A relay contact per controller Relay rating 264 V rms max 10 V de min 0 5 A resistive Leakage Less than 4mA rms at 265 Vrms Each controller has the following independent parameters Set point type Manual or Automatic Manual set point O to 1200 C 2000 F in 1 degree increments Auto s p trim 50 C 90 F in 1 degree increments Auto s p clam
16. iler soak time O to 1000 Profiler soak temperature 0 to 2000 Profiler end temperature 0 to 2000 vY 01 R Profiler soak elapsed 0 to 1000 Profiler start stop Otol p Only available on P256 1 Coded data field see section 5 3 5 2 5 Data field The data field part of the message consists of 4 ASCII numeric characters preceded by an optional minus sign The data field should be left padded with zeros such that there are always 4 numeric characters For example 0000 represents zero 0100 represents the number 100d 0100 represents the number 100d 5 3 Normal message responses A successful message received by the instrument will usually initiate a message response This will consist of a message of the following general form AAPSSD D lt CR gt Where Response message header ASCII code 2Ah AA Instrument address P Parameter code SS Secondary parameter code D D Data lt CR gt Message terminator ASCII code ODh The returned data field contains either the data requested read transaction or confirmation of the data just written write transaction All data returned is numeric and is of the type defined in section 5 2 5 Certain parameters however use coded data fields as follows Parameter M controller hold status This parameter returns a bit weighted number with the following bit meanings Bit Meaning zone 1 in Hold zone 2 in Hold zone 3 in Hold zone 4 in Hold zone 5 in Hold AUNO
17. itch 1 is used to select the number of controllers required SW1____ No of controllers All 6 controllers are used First 3 controller only are used Switch 2 must be set to the same temperature units as the P256 OFF for C ON for F Switches 3 4 5 and 6 set the unit s communications address and controller number ase address 2 Controllers 13 to 18 Base address 3 Controllers 19 to 24 Base address 4 Controllers 25 to 30 Switches 7 and 8 must be set to same comms base address as the P256 M53 Issue 0 5 Series 256 User Manual Page 9 1 4 PCB Jumper Links In addition to the DIL switch there are two jumper links which may be set by the user To gain access to these links the instrument EOWETZUDDI AnPEr Beate e printed circuit boards must be removed from the case Unplug all wiring connectors and remove the rear plate retaining screws two screws top and bottom Lift off the rear plate and pull out the required PCB Adjust the link settings as required and then reassemble the instrument by plugging in the PCBs Note that there are no PCB card guides until the PCB is almost fully inserted Refit the rear plate and reconnect all wiring connectors 1 4 1 Thermocouple break detection The instrument can detect broken zone thermocouples If break detection is switched on a broken thermocouple will be measured as over range This will cause the zone controller to turn off the output for that zone If break d
18. legal data M53 Issue 0 5 Page 22 Series 256 User Manual 0 Illegal number of characters in command In general only one possible error will be identified thus either fields E or F will be zero Where a command character is found to be corrupted then the receiving instrument s will treat the corrupted character as the final character of the message and will attempt to interpret it Where the corruption has occurred in the header or address fields of the message then no reply is given and message is ignored If as is likely the message continues after the corrupted character then the instruments will treat that part of the message after the corruption as a new message This will generate a reply if the supposed address in the remainder of the message is recognised by an instrument this is bound to result in an error message but fields E and F will refer not to the original corruption but to the meaningless nature of the remainder of the message For this reason no great reliance should be placed on the validity of either E or F When the instrument detects a communications error it will emit a short beep from its internal sounder Specifications 6 1 General Front bezel Bezel size Panel cut out Case Case depth Connectors Display window Display Display backlight Buttons Panel fixing Weight Protection Safety Installation Cat Pollution degree EMC Serial interface supply Environment 6 2 Controllers Dark gr
19. means of a mimic diagram Current profile setpoint Current profile segment 97 C q 50 A 800 2 5 A 500 FA 100 PMheating Profile parameters M53 Issue 0 5 Page 16 Series 256 User Manual The diagram shows a typical heat soak cool profile with each stage numbered The large number in the centre of the display shows the current profile setpoint with the current segment indicated by a flashing number While the profile is ramping up or down the user may speed up the ramp using the Fast facility To Fast through a heating ramp press and hold down the up button and press button 1 To Fast through a cooling ramp press and hold down the up button and press button 4 Press the down button to monitor the profiler via the Controller Overview display At the bottom of the display each profile parameter is listed adjacent to a number To modify a parameter press the corresponding numbered button 4 2 Heating rate Use this display to set the profile heating rate in degrees per hour This is the rate at which the profile setpoint increases from the starting temperature to the desired HEATI NG RATE soak temperature If the profiler is currently running the pean sae 600 deg Hr heating ramp this change will take affect immediately Enter a rate of zero if you require to step change the ice Wis Chance walue setpoint to the soak temperature Use Elfor more Press button 1 to return to Profiler Overview display If no but
20. ne temps fall while power off Ramp continues from hottest zone Power OFF Power ON Zone temps fall while power off Soak Level Soak continues os SP ramps back to Soak level Power ON Power OFF The controller displays consist of a controller overview and a scroll of up to four parameter displays for each control zone The diagram below shows the relationship between each of the displays M53 Issue 0 5 Series 256 User Manual Page 13 Controller y Profiler F Show SPs Overview Overview El E A gt Controller 1 a _ Controller 6 Manual i Manual Setpoint 3 i Setpoint 2 Setpoint 2 Setpoint 2 Mode i ft Mode 2 Setpoint 2 Setpoint 2 Setpoint o Setpoint Clamp 3 i Clamp 4 3 4 The user moves between each display by pressing one of the buttons The instrument will emit a short beep every time a button is pressed 3 1 Controller overview The controller overview display is used to supervise the operation of the six internal zone controllers Deviation Bargraph Setpoint type AUTO Setpoint type MANUAL Controller number Zone temperature Zone in Hold User Prompt for S P Yfor Profile Each zone controller is represented by a rectangle on the display Within this rectangle the current zone temperature is shown along with the setpoint mode At the top of each rectangle is a zone deviation bargraph this represents the error between the curr
21. o change value Alternatively press the button corresponding to the Use tor more controller number to advance to the Setpoint Mode display If no buttons are pressed for 20 seconds then the display will revert back to the Controller Overview 3 3 Setpoint mode Use this display to toggle the zone controller between automatic and manual setpoint modes Use the up button to select AUTO mode and the down button to select MANUAL mode If the controller mode is modified then this change is implemented immediately so please ensure that the manual setpoint value is correct before Use to change mode selecting manual mode Use for more Alternatively press the button corresponding to the controller number to advance to the Setpoint Trim display If no buttons are pressed for 20 seconds then the display will revert back to the Controller Overview CONTROLLER 1 SIP mde is AUTO 3 4 Setpoint trim Use this display to apply a setpoint offset to the zone controller in automatic mode Positive values will cause this zone controller to control slightly hotter than the current profile setpoint Negative values will cause this zone controller to control slightly colder than the profile setpoint Any value between 50 and 50 degrees may Use to change val ue be entered Use tor more The trim facility is only affective if the zone controller is in automatic mode and the setpoint trim facility is enabled on the DIL switch CONTRO
22. onnected across the load this will usually solve any problem The resistor will get hot so take care to mount it so that this does not cause a hazard Line Supply Neutral La Loads Laa O ooo Reverse TC Alarm L e e e e e e e e e e m m m m l 1 2 4 Serial Communications All series 256 instruments are equipped with two RS422 standard serial communications ports This allows the units to communicate with each other and any other suitable equipment over distances up to 1200m The HOST port is used for communications with a host computer system for monitoring or recording purposes The LOCAL port is intended purely for communications between series 256 instruments only and is used for the transfer of setpoints and control information TX Local Controller iR Comms Network RX RX TX Host Computer TX Comms Network Common M53 Issue 0 5 Series 256 User Manual Page 5 HOST HOST HOST Computer 256 S 256 S256 LOCAL LOCAL LOCAL Programmer Optional Optional Optional amp Zones 1 6 Zones 7 12 Zones 13 18 Zones 19 24 The serial communications may be connected using either the two or four wire system The instrument uses a balanced voltage communications system which will perform well under most situations provided some simple guidelines are observed 1 The communications wiring should be implemented using a suitable screene
23. p O to 1200 C 2000 F in 1 degree increments 6 3 Profiler The profiler has the following parameters Heating rate O step to 1000 degrees per hour in 1 increments Soak temperature O to 1200 C 2000 F in 1 degree increments Soak time O to 100 0 Hrs in 0 1 Hr increments Cooling rate O step to 1000 degrees per hour in 1 increments End temperature O to 1200 C 2000 F in 1 degree increments Hold mode Ramps only or ramps and dwell M53 Issue 0 5 Page 24 Series 256 User Manual M53 Issue 0 5
24. s the connections for 2 wire RS485 operation This method of connection uses a single pair of wires for both transmission and reception with the data direction being controlled by the currently active device As in the 4 wire connection a common wire is shown on the diagram This wire should be fitted if at all possible Controller network connection When more than 6 control zones are needed additional S256 controller instruments are required These instruments are connected to the P256 programmer via the local communications port Controller Local Port Programmer Local Port Controller Local Port M53 Issue 0 5 Series 256 User Manual Page 7 1 3 User Switch Settings The instrument type is set by means of the switch on the back panel of the instrument While aspects of the instruments operation are set by the user on the options DIL switch This switch is accessible through a cut out in the case at the bottom of the instrument Use a narrow pointed device such as a ball point pen to set the switches to the required positions The meanings of the DIL switch settings are different between the Programmer version P256 and controller version S256 1 3 1 Programmer Controller switch The Programmer Controller selector switch is situated on the back panel of the instrument This switch should only be operated when the instrument is powered off Move the switch to the S256 position to specify that the instrument is to be used as a
25. sage is directed An instrument will ignore a message that does not contain its own address The user may choose to use the broadcast address facility This is a means of writing data to a group of instruments at the same time Either address character may be replaced by the character X ASCII code 58h For example if a write message is sent to address 2X then all instrument addresses 20 to 29 will action the message Please note instruments written to using the broadcast address facility will not reply to the message 5 2 4 Parameter code and SS field The parameter code field of the message is a single ASCII character this identifies the parameter group within the instrument which is the target of the read or write message Used in conjunction with the two digit SS field the instrument is able to identify the specific parameter required Code SS RW Parameter____________DataRange Units __ A 011006 R___ Zone temperature 1to6 Oto2000 Degs A 07 BR Coldjunctiontemperature _ Oto100 Degs B 01to06 R___ Zone outputs 1to6 2 0t0o1000 0 1 M pot _R_ Zoneholdstatus _ J N 011006 R___ Zone actual setpoints 1to6 Oto 2000 Degs O _ 01to06 _ R W_ Zone setpointtypes 1to6 QP 01 IR Statusofprofiler _ Y QP 11 R__ Holdstatus of profiler Oto1 R 01 R__ Current profiler setpoint 0102000 Degs M53 Issue 0 5 Page 20 Series 256 User Manual Profiler cooling rate 0 to 1000 Degs Hr Prof
26. tively pauses the profile until the offending zone temperature has come back within limits If a Hold occurs during a ramp stage the ramp is suspended for the duration of the hold This has the affect of extending the expected ramp time If a hold occurs during a soak stage the soak time is stopped for the duration of the hold This guarantees that all zones have been soaked to the required tolerance for the required time Obviously the apparent soak time may be extended if a hold does occur 2 2 3 Supply failures during a profile Supply interruption during a ramp If the profiler is executing a ramp and a supply interruption occurs It is very likely that during the power outage the zone temperatures will drop Upon supply restoration the instrument forces its profile setpoint to be equal to the hottest of the zone temperatures and continues the ramp form there Supply interruption during a soak If the profiler is executing a soak and a supply interruption occurs It is very likely that during the power outage the zone temperatures will drop Upon supply restoration the instrument forces its profile setpoint to be equal to the hottest of the zone temperatures and ramps the setpoint back to the soak level at the heating ramp rate When the setpoint reaches the soak level the soak timer is restarted from zero Controller displays HOLD HOLD during a ramp 1 Hour HOLD HOLD during a 2 hour soak Zo
27. tons are pressed for 20 seconds then the display will revert back to the Profiler Overview 4 3 Soak temperature Use this display to set the soak temperature in degrees This is the temperature at which the profile setpoint remains static for the soak period If the profiler is currently performing the soak and this value is changed Soak at 800 degrees then the setpoint will be ramped to the new soak temperature at the specified heating rate and the soak Use ee ae will be restarted Use Pitor more SOAK TEMPERATURE Press button 2 to return to Profiler Overview display If no buttons are pressed for 20 seconds then the display will revert back to the Profiler Overview 4 4 Soak time Use this display to set the profile soak time in hours This is the time for which the profile setpoint remains at the ei desired soak temperature If the profiler is currently 2 5 performing the soak and this time is reduced below the TAAS week hee currently elapsed soak time the soak will terminate immediately and the cooling ramp will commence Use to change value Enter a time of zero if you do not require a soak use Elfor more M53 Issue 0 5 Series 256 User Manual Page 17 If the profiler is running then the remaining soak time will be shown in brackets below the target time Press button 3 to return to Profiler Overview display If no buttons are pressed for 20 seconds then the display will revert back to the Profiler Overview
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