OPERATIONAL MANUAL FOR 85XX

Transcription

1 TECHNICAL DETAILS OPERATIONAL MANUAL FOR 85XX Ref. No. : m83/om/402 This is a versatile microcontroller based Scanner with a very high performance to price ratio. The features offered in this product are better than any other Scanner available in similar price range. The instrument is made in 96x192x210 mm size with standard cut out of 92x188 mm. Front is sealed membrane type to withstand dusty environment. On back plate PCB soldered 35 deg. angled terminals and flat terminals of very good quality are used. The programming, calibration and operation of the instrument is by nine simple keys with two independent displays for channel and data for that channel. Channel display is of two digit to differentiate it from Data display of four digit each of 0.56" display. Status of Run/ Program/Verify mode, Fault, Auto/Manual mode and status of each channel for programmed set point type and limits are displayed by 3 mm red LEDs. The operation of the instrument is menu driven with user understandable prompts. Provision for PASS WORD is kept for unauthorised access. The product is made to accept all 7 standard thermocouple, PT100 RTD, Linear voltage and current inputs. The type of input can be changed in field itself. The calibration of the unit is done without trimpots. The unit can be calibrated in installed condition itself by front panel keys at any given point i.e. user need not feed a fixed signal. RTD inputs are linearized for 0.1 deg. as well as 1 deg. resolusion. No. of Groups as well as no. of channels within the group are programmable. Set point type ( LL, hl or hh ), abnormal status for alarm limit1 and alarm limit 2 ( Alarm or Trip ) as well as Relay action type for alarm limit 1 and alarm limit 2 ( ON or OFF ) are programmable. Latching for LED Status of alarm limit 1 and alarm limit 2 is programmable. For each group two relays are given. (Relays with two NO/NC contacts are optional). Scan time is programmable up to 99 seconds. Provision for zero and span setting is made to restrict range of usage and programming. This restricts accidental wrong setting of set point beyond the range of interest. Outside this range the unit will indicate data as 'OVER' for some abnormal condition. This zero and span setting is used for linear inputs for setting the range between to 9999 counts. Serial Communication with RS 232 / RS 485 is also provided for using the scanner as backend for Supervisory Control or for P.C. connectivity. Standard protocol for communication used is MODBUS-RTU. Operational manual - 1 -

2 SPECIFICATIONS DISPLAY 2 digit 0.56" Red LEDs for channel no. 4 digit 0.56" Red LEDs for data of current channel. 5 mode selection discrete Red LEDs. Individual discrete Red LEDs to indicate channel status. INPUT RANGE Thermocouple types B, E, J, K, R, S & T (ANSI standard ) RTD - Pt100 3-wire 4-20 ma or 1-5 V DC linear 0-20 ma or 0-5 V DC linear Other types on request Cold junction compensation automatic for thermocouple types Accuracy +/- 0.1% of span +/- 1 Count Input open protection upscale /downscale programmable B to 1750 Deg C E to 1000 Deg C J to 760 Deg C K to 1350 Deg C R - 0 to 1750 Deg C S - 0 to 1750 Deg C T to 200 Deg C Cu to Deg C PT to Deg C PT to 850 Deg. C 4-20 ma - Field scaleable to V - Field scaleable to 9999 ALARM/TRIP OUTPUT Up to 6 Groups with individual relay output for Output each group relay and each alarm limit for a group rated for 230 VAC., selectable for alarm or trip. Common hysteresis setting 0 to 100. Relay status configurable as normally ON or OFF. Set point type configurable as L, VL or L, H or H, VH. CALIBRATION Operational manual - 2 -

3 Zero and span adjusted by digital calibration through front panel keys. No trimpots. CONTROLS Vfy, Increase, Decrease, Auto/Man, Next, Skip/Self Check, Al1/Al2, Scan Time and Enter keys for operation, programming & calibration. GENERAL power supply - 110V/230V AC 50 Hz. - user selectable 24 v dc optional Ambient - 0 to 55 deg C. Humidity - up to 95% RH (Non-condensing) power consumption - Less than 20 VA PHYSICAL case - M.S. powder coated with ABS molded bezel Terminals - Barrier screw type can accept up to 2.5 sq. mm wire Bezel size - 96 X 192 mm Depth behind panel mm / 250mm (with terminal plate) Panel cutout - 92 X 188 mm OPTIONS 24 open collector outputs For optimum Instrument performance follow the points listed below. SUPPLY VOLTAGE Supply voltage should be given through a good isolation transformer. This being a microprocessor based instrument, a massive voltage spike can damage it. A good isolation transformer shields the instrument from such voltage spikes and surges. All supply connections to final control devices such as contactors, solenoids etc. must be taken directly from the supply and not from the supply terminals of the instrument. EARTHING An effective earth is mandatory for the instrument. Take separate earth wires for separate instruments, avoid looping of earth wires. LAYOUT Operational manual - 3 -

4 All low level input and output such as t/c, rtd and control signal wires must be kept separate from supply and relay output cabling. USER GUIDE 1. INTRODUCTION This is a single chip microcontroller based Scanner designed for Universal input type. Instrument is operated by nine user friendly keys. These keys are used for operation, programming and calibration. There are four levels of protections in the instrument. The four levels decide access to verify settings(operator level), access to set points & control parameters(supervisor level), configuration and calibration. The manual covers all aspects of operation of the instrument. Please read instructions carefully before altering any programming or configuration information. 2. OPERATION 2.1 POWER SUPPLY Before connecting power to the instrument ensure that you are connecting right input voltage to right terminal. The instrument is having 4 terminals for 110/230V Mains Supply. On application of proper power, the instrument will display Scanner type set for 2 seconds and then display input type set for two seconds. Now, if the input signal is connected, it will display value of input in DATA window and channel no. in Channel window on Display along with appropriate mode LED. 2.2 KEY BOARD There are nine keys for operation of the instrument. For understanding the operation first let us see the operation of keys. VFY This key is used to select desired parameter in verify, program or configuration modes. On first press of this key, it will display appropriate mode of operation ( CNFG, PRGM, VCFG, VPGM). By pressing inc or dec key you can select the desired mode of operation. Now if you again press the vfy key then the instrument will come in Run mode. The corresponding mode LED will glow on pressing this key. ENTER/ACK Operational manual - 4 -

5 This key is used to enter the value of the selected parameter. After setting the data to proper value, if ENTER key is pressed, the data will be permanently stored in non-volatile memory. On pressing of ENTER key, the decimal point on last digit disappears to indicate that data is entered. Now, the data change is not allowed until ENTER key is pressed once again. On pressing of ENTER key once again, decimal point on last digit will glow and allow change in the data. This key when placed during RUN MODE will be taken as a ACK key which is used to acknowledge the relays and LED status. INC ( ) This key will increment the selected parameter value by one count in program or configuration mode if the units digit is flashing. Depending upon the flashing digit parameter value can be incremented by 10 times fast up to the maximum value of that particular parameter. DEC ( ) This key will decrement the selected parameter value by one count in program or configuration mode if the units digit is flashing. Depending upon the flashing digit parameter value can be decremented by 10 times fast up to the minimum value of that particular parameter. NEXT This key is used to move into next parameter in a current mode. When pressed in Run mode, the next unskipped channel will be displayed. Normally it is used in MAN mode for fixed channel display. AUTO/MAN This key is used to set the unit in either auto mode or manual mode. This is a toggle key. i.e. if it is pressed in auto mode, the unit is switched into MAN mode and channel display will become fixed. MAN LED will glow in MAN mode to indicate the same. In linear input ( voltage and current), this key is also used for individual zero/span and decimal point position setting. SCAN TIME This key is used to set the scan time for display of channels and its reading. It can be incremented up to 99 using INC key or decremented up to 1 using DEC key. SKIP / SCHK KEY This key is used to skip / unskip the channel. This is also a toggle key. i.e. if key is pressed while channel is skipped, it will unskip the channel. On pressing this key in proper mode, skip / unskip message will be displayed in Data window and channel no. will be displayed in Channel window. Self Check option is kept for future enhancement. AL1 / AL2 This key is used to change from alarm limit 1 to alarm limit 2 and vice-versa. This is also a toggle key. Operational manual - 5 -

6 2.3 MODES OF OPERATIONS There are seven modes of operations. 1. run mode 2. auto / manual mode 3. verify program mode 4. program mode 5. configuration mode 6. verify configuration mode 7. calibration mode 1. RUN MODE Indicated by RUN LED glowing. In this mode, channel window will display current channel number and DATA window will show its temperature. In AUTO mode, it will keep on displaying successive unskipped channels at the programmed scan rate. In case of MAN mode, only one channel will be displayed continuously. For manual mode separate indication of mode is provided by LED on front. In RUN mode, alarm status of channels is indicated by discrete LEDs for both AL1 and AL2 limits. If the LED is on, the channel has crossed that limit. If the LED is flashing, the alarm is not acknowledged. When ENTER/ACK key is pressed, the LED will become steady to indicate acknowledged alarm. The relay of that channel will be turned OFF, on acknowledging the alarm, if the alarm type is not configured for trip logic, where relay is not turned OFF until it actually comes within limit. The type of action and normal status of relay are programmable and are described in Configuration mode. There is a facility for latching of alarm status. Even when the channel comes back to normal mode, LED will be ON till acknowledged to indicate past alarms. The relay will be self clearing in this mode. For currently selected calibration channel decimal point on unit's digit of channel no. will glow. 2. MANUAL MODE Manual mode is same as normal run mode except for displaying only one channel continuously. The channel number can be changed by NEXT key. This mode is entered by pressing AUTO/MAN key. Pressing this key once again brings back to AUTO mode. 3. VERIFY CONFIGURATION MODE This mode is to verify all the configuration parameters like scanner type, input type, no. of groups, no. of channels in each group, decimal point, zero, span etc. User can view the data but can t change the data in this mode. For entering into verify configuration mode, press VFY key in RUN mode and VFY LED will glow to indicate the mode selection and display will ask to select the mode. By pressing increment and decrement key select VCFG option and press ENTER key. Then press NEXT key to enter in verify configuration mode. Pressing VFY key will take you out of this mode. 4. VERIFY PROGRAM MODE Operational manual - 6 -

7 This mode is to verify the alarm limits, scan time and channel skip information. User can view the data but can not change it in this mode. For entering into verify program mode, press VFY key in RUN mode and VFY LED will glow to indicate the mode selection and display will ask to select the mode. By pressing increment and decrement key select VPGM option and press ENTER key. Then press NEXT key to enter in verify program mode. Pressing VFY key will take you out of this mode. 5. PROGRAM MODE This mode is used to display / change alarm limits, scan time and skip status of channels. For entering in this mode, press VFY key in RUN mode and VFY LED will glow to indicate the mode selection and display will ask to select the mode. By pressing increment and decrement key select PRGM option and press ENTER key. By pressing the ENTER key it will ask for Password. If the Password is correct then it will go in to Program mode and PRG LED will start glowing to indicate the current mode of operation. Then press NEXT key to enter in program mode. Pressing VFY key will take you out of this mode. Factory set password is '00'. If the user has programmed password in configuration mode, go to correct password using INC key and DEC keys and then press ENT key. CHANNEL First parameter is alarm limit 1 for channel 1. The upper row LED ( for AL1 ) for channel 1 will be flashing to indicate channel affected by this limit. Also a decimal point on last digit of data will glow. Change the limit as per requirement by INC and DEC key and press ENTER. The LEDs will stop flashing. For changing the entry once again, press ENTER key. The decimal point on last digit of data indicates, whether changing of data is allowed or not. If decimal point is off and LEDs are steady data changing is not allowed. Pressing NEXT key will bring display to 02 limit. CHANNEL Alarm limit for 1 for channel 2. The upper row LED ( for AL1 ) for channel 2 will be flashing to indicate channels affected by this limit. Other operations are identical to channel 1. Pressing NEXT key will bring display to 03 limit. CHANNEL Alarm limit 1 for Channel 3. Operational manual - 7 -

8 The upper row LED ( for AL1 ) for channel 3 will be flashing to indicate channel affected by this limit. Other operations are identical to channel 1. Pressing NEXT key will bring display to 04 limit. Thus you can set AL1 limit for each individual channel. For programming AL2 limit for all channel s, press AL1/AL2 key to change to AL2 limits. Now, the lower row LEDs for AL2 will start flashing for the particular channel. Other operations are identical to AL1 programming. SCAN TIME For programming Scan Time, press SCN TIME key in program mode. Display will show : St 001 Displays scan time for updating the channel on display. Maximum Scan Time is 99 Sec. Minimum Scan Time is 1 Sec. Change Scan Time by INC and DEC keys and press ENTER when correct value is set. SKIPPING / UNSKIPPING OF CHANNEL For changing the skip status of channels, press SKIP key in program mode. The display will show channel skip status. If Ch-1 is skipped, display will be 1 S-ch If Ch-1 is unskipped, display will be 1 U-ch Channel can be selected by pressing NEXT key. SKIP key works as a toggle key, i.e. if channel is skipped, by pressing SKIP key status will change to unskip and vice-versa. After changing the skip status, press ENTER key to store the status. Skipping of all channels is not allowed. At least one channel has to be unskipped for operation of unit. When user tries to skip the last unskipped channel, it will not allow. In program mode, user can select any parameter by using NEXT, SKIP, AL1/AL2 and SCAN TIME keys and can abort from this mode by pressing VFY key. For Verify mode all the parameter sequences are same except for password entry and decimal point in last digit is 'off'. 6. CONFIGURATION MODE Operational manual - 8 -

9 Configuration mode is used to change basic configuration of unit. The program is same for all options and all options are configurable from front only by using various keys. No hardware changes are necessary for changing input type. It can be changed by using just front keys. For entering Configuration mode, press VFY key in RUN mode and VFY LED will glow to indicate the mode selection and display will ask to select the mode. By pressing increment and decrement key select CNFG option and press ENTER key. Now it will ask for Password. After setting correct Password with the help of INC and DEC keys press ENTER. If the Password is correct then only you can enter in Configuration mode. PRG LED starts glowing which indicates the mode of operation.then press NEXT key to go ahead in Configuration mode. Pressing VFY key will take you out of this mode. By entering in Configuration mode, the scanner will display scanner type. The parameters in sequence are described below. User can go to next parameter in sequence by pressing NEXT key. SCANNER TYPE no OR no OR no There are three options 8508 or 8516 or 8524 for this parameter. Pressing INC and DEC key you can make it 8508 or 8516 or INPUT TYPE IP E-tc Input type can be selected by INC key or DEC key. Each type is displayed by prompt as follows. E-tc - E - type thermocouple J-tc - J - type thermocouple K-tc - K - type thermocouple t-tc - T - type thermocouple b-tc - B - type thermocouple r-tc - R - type thermocouple S-tc - S - type thermocouple CU-53 - RTD CU-53, 0.1 deg. Resolution rtd1 - RTD PT-100, 1 deg. Resolution Operational manual - 9 -

10 rtd0 - RTD PT-100, 0.1 deg. Resolution ma or 1-5 V input V input or 0-20 ma For changing of input type, no internal hardware changes are required. If input type is 4-20mA then you are required to connect the 250ohm Resistors supplied between the INHI and INLOW terminals of the terminal plate,. OPEN COLLECTOR n oc If open collector outputs are used then select yes (y) otherwise select no (n). NO. OF GROUPS 06 no-g No. of Groups are minimum 1. No. of Groups are maximum 6 ( if open collector is n ) and 3 ( if open collector is y ). SETPOINT TYPE hh OR hl OR LL SPtY Where hh - high, very high AL1 - high AL2 - very high hl - high, Low LL - low, very low This setting is common for all groups. AL1 - low AL2 - high AL1 - very low AL2 - low CONFIGURE ABNORMAL STATUS OF AL1 Operational manual

11 AL OR tr CAL1 Configuration of abnormal status for AL1 limit. It will toggle between ALRM and TRIP by INC and DEC keys. In alarm type, discrete LEDs and relays are self clearing. In trip type, both are latched. They will go off only by pressing ACK key and returning to normal status. Even if the reading has come to normal, relay will not be turned off until ACK key is pressed. This is useful when the relay is used for tripping the plant or device and it is not to be started once again until operator has set up for starting once again. This is common for all groups. CONFIGURE ABNORMAL STATUS OF AL2 AL OR tr CAL2 This is for configuration of abnormal status for AL2. Other description is same as AL1. RELAY STATUS OF AL1 OF OR on CrL1 Configures normal relay status as ON or OFF for AL1 Relay. This is common for all groups. RELAY STATUS OF AL2 OF OR on CrL2 Configures normal relay status as ON or OFF for AL2 Relay. This is common for all groups. If it is configured as ON, relay will remain ON when all channels of that group are in clear status. This is useful for specific applications where Scanner ON is used for making a contact for failsafe operation, i.e. user wants to sound buzzer or annunciator when Scanner is turned OFF or it is not working. LATCHING OF ALARM Y OR no Operational manual

12 Ltch This is used to enable latching of discrete LEDs when alarm limit is crossed. This option will keep discrete LEDs latched even after the channel has come to normal status until ACK key is pressed. This option can be changed to Yes or no for enabling and disabling respectively. When CAL1 and CAL2 are of trip type, this parameter will be skipped from display. NO. OF CHANNELS IN GROUP X 15 GrPX Here, X indicates no. 1 to 6.(e.g. GrP1, GrP2, GrP3, GrP4, GrP5, GrP6). Up to 8 channels in group 1, if no. of groups is 1, if scanner type is Up to 16 channels in group 1, if no. of groups is 1, if scanner type is Up to 24 channels in group 1, if no. of groups is 1, if scanner type is Minimum no. of channels in a particular group is 1. OPEN SENSOR UP/DOWN UP OPEN This is used to define the state of the alarms in open sensor condition. It can be configured as UP or DOWN by pressing INC and DEC keys. If it is configured as UP then Open condition will be treated as alarm / abnormal condition. If it is configured as DOWN then Open condition will be treated as normal condition. HYSTERESIS h 010 Hysteresis for relay operation an alarm limits. This parameter is common for all groups. Minimum value can be '0' and maximum value can be 100. Use INC or DEC keys for changing the value. For RTD Pt100,0.1 deg. resolution, maximum setting will be 10.0 deg. ZERO Z Zero value or minimum value for selected input. Up to 5% below of the total zero and span value, OVER will be indicated on display. For out of range value, OPEN will be indicated on display. Operational manual

13 Minimum value is decided by input type. Maximum value will be span value. For linear inputs, this is the zero setting for range programming. This will be treated as common Zero value for all the channels. For linear inputs ( voltage and current ), there is provision for setting zero/ span/ dp position for each channel individually. By pressing AUTO/MAN key here, you can enter individual zero value for all the channels. Display will show as : Discrete LED 1 of AL1 will start flashing.by pressing INC/DEC keys, you can set the zero value for channel 1. If you press AUTO/MAN key here then Discrete LED 1 of AL2 will start flashing. By pressing INC/DEC keys, you can set the span value for channel 1. AUTO/MAN key here works as toggle key between AL1 & AL2. By pressing NEXT key here you can go to next channel and similarly set the zero and span values of other channels. If you want to come at channel 1 from any other channel then use SCN TIME key. VFY key will bring you back to the configuration mode ( ie. One level up ) at common zero value setting. From here you can go to the next parameters setting. SPAN S 2000 Span value or maximum value for selected input. Up to 5% above of the total zero and span value, OVER will be indicated on display. For out of range value, OPEN will be indicated on display. Maximum value is decided by input type. Minimum value will be zero value. For linear inputs, this is the span setting for range programming. For linear inputs ( voltage and current ), by pressing AUTO/MAN key here also, you can enter individual zero/ span values for all the channels. Display will show as : Discrete LED 1 of AL2 will start flashing. All the functions described in the previous description of zero value setting are applicable here. DECIMAL POINT POSITION dp 003 Decimal point position is applicable only to 4-20 ma or 0-5V i/p. It can be set between 0 to 3 as per requirement. This parameter will be skipped for all other input types except 4-20 ma or 0-5V i/p. Operational manual

14 By pressing AUTO/MAN key here, you can enter individual dp position value for all the channels. Display will show as : Discrete LED 1 of AL1 will start flashing.by pressing INC/DEC keys, you can set the dp position value for channel 1. By pressing NEXT key here you can go to next channel and similarly set the dp position values of other channels. If you want to come at channel 1 from any other channel then use SCN TIME key. VFY key will bring you back to the configuration mode ( ie. One level up ) at common zero value setting. From here you can go to the next parameters setting. If you are using the instrument in linear input with individual scaling of zero/span and dp then don t press ENTER key at the main zero/span and dp parameters in the configuration mode after setting individual values. Main zero/span and dp values are common values for all the channels. After setting individual values if you will press ENTER key at main zero/span/dp then this will make zero, span and dp values same or common for all the channels. PASSWORD 00 PASS Password for entering to Program mode and Configuration mode. The value of password can be programmed anywhere between '0' to '99'. Factory set password is 00. SERIAL NUMBER 1 Srno This parameter is required while using the Serial Communication facility. It represents the serial number or the ID number of the Unit. It can be configured between 1 and 99 by using INC/DEC keys. BAUD RATE bd 9600 This parameter is used to set the BAUD RATE for serial communication. Different baud rates can be selected by INC/DEC keys. 7. CALIBRATION MODE Operational manual

15 You can calibrate instrument after entering in configuration mode, press SCN TIME key to enter into Calibration mode. In calibration mode three values are displayed and programmed as follows. CALIBRATE CHANNEL 01 CLch This is the channel where calibration input is fed. Default calibration channel at power on is 1. This channel can be programmed to any unskipped channel where calibration input is to be connected. Maximum calibration channel will be decided by type of scanner. This is the first parameter in calibration mode. This channel number is not stored in EEPROM, so at power on it will always come to default value as first channel. If you are using the Instrument in linear input ( voltage and current ) with individual scaling of zero/span/dp then calibrate the Instrument in the channel which covers maximum range (span zero). AMBIENT CALIBRATION CA 027 It will display current reading of ambient temperature. Use INC or DEC key to bring it to correct value and press ENTER key to store ambient temperature. For coming out of calibration mode press VFY key. When i/p type is RTD or Linear then this parameter will not be displayed. ZERO CALIBRATION CZ 054 It will display current reading of calibration channel. Use INC or DEC key to bring it to desired value and press ENTER key to store zero calibration. On both sides 5% of total span is allowed for adjustment. For coming out of calibration mode press VFY key. SPAN CALIBRATION CS 1200 It will display current reading of calibration channel. Use INC or DEC key to bring it to desired value and press ENTER key to store span calibration. On both sides 5% of total span is allowed for adjustment. Operational manual

16 NOTES : It is mandatory to reset the Instrument by switching off the Power if the input type is changed. Calibration is also required to be done again. On Program, Verify, Configuration and Calibration modes, 20 Sec time out is provided i.e. if no key is pressed for 20 seconds, it will fall back into Run mode. While programming value, if the INC or DEC key is kept pressed for more than 10 counts, the speed of change will be increased by 5 times. It is the dual speed concept for changing value at faster rate. On power on scanner will first display model (8508/8516/8524), then input type for some time and then it will come to actual Run mode display. If there is any error in EEPROM data, it will display error message and halt. 10 -Err The upper two digit display will show no. of parameters having errors and lower 4 digit display will show -err message. To see the parameter having error, scan through parameters both in Program mode & Configuration mode. The decimal point of first digit of channel no. display will glow, if the parameter data in EEPROM is disturbed. Operational manual