AMALGAMATED INSTRUMENT LD4-LN Operation And Instruction Manual Download Page 1

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LD4-LN

Large Digit Display

DC Current / DC Voltage

50 Point Lineariser

Operation and Instruction Manual

(Inputs 0-20mA, 4-20mA, 0-100mV,

0-1V, 0-10V or 0-100V)

ACN: 001 589 439

AMALGAMATED INSTRUMENT CO PTY LTD

Unit 5, 28 Leighton Place Hornsby Telephone:
NSW 2077 AUSTRALIA Facsimile:

+61 2 9476 2244 e-mail: [email protected]
+61 2 9476 2902 Internet: www.aicpl.com.au

Summary of Contents for LD4-LN

Page 1: ...and Instruction Manual Inputs 0 20mA 4 20mA 0 100mV 0 1V 0 10V or 0 100V ACN 001 589 439 AMALGAMATED INSTRUMENT CO PTY LTD Unit 5 28 Leighton Place Hornsby Telephone NSW 2077 AUSTRALIA Facsimile 61 2...

Page 2: ...ions 15 Lineariser functions 19 Error Messages 25 Function Table 26 Lineariser table 28 Analog PI Control Output 29 Proportional control output 29 Integral control output 31 Specifications 34 Technica...

Page 3: ...d inbuilt relays are provided for alarm control functions a transmitter supply of 18VDC unregulated is also provided on AC powered models An optional isolated 12V 24V transmitter supply is available O...

Page 4: ...n below All sizes are in mm Mounting hole diameters are 6 5mm Page 4 of 46 LD4LNMAN 1 0 1 5 6 3 180 155 121 85 145 253 57mm 4 digit display An optional panel mount kit is available for the 57mm type d...

Page 5: ...ng power to the instrument When power is applied the instrument will cycle through a display sequence indicating the software version and other status information this indicates that the instrument is...

Page 6: ...ply board connects directly to the main circuit board power supply connector via the plug in connector P1 terminals 3 2 Relay connections The LD4 is supplied with two alarm relays as standard with con...

Page 7: ...of installation Connection examples 1 4 wire 20mA or 4 20mA input externally powered sensor 2 3 wire 20mA or 4 20mA input externally powered sensor common negative 3 2 wire 20mA or 4 20mA input extern...

Page 8: ...optional 24V 12V supply 7 3 wire 20mA or 4 20mA input powered from optional 24V 12V supply Page 8 of 46 LD4LNMAN 1 0 1 SENSOR UN REG COM INPUT EXCITATION PLUG IN AFTER WIRING Shield UN REG COM INPUT...

Page 9: ...ote input connector via a switch or relay contact will cause the selected remote input function to operate Choose the switch type to suit the remote input required e g for a ZERO function a momentary...

Page 10: ...e as part of the wake up messages when the message is seen you can release the button Move to step 2 below 2 When the wake up messages have finished and the display has settled down to its normal read...

Page 11: ...is to power up via CAL mode i e there is not entry to FUNC mode unless the instrument is powered up in CAL mode See the Analog PI Control Output chapter for an explanation of the analog PI control fun...

Page 12: ...to 3 0 then the setpoint output relay will activate once the display value goes above 50 0 and will reset when the display value goes below 47 0 50 0 minus 3 0 In the low alarm mode once the alarm is...

Page 13: ...this function will not be seen if both the high and low setpoints are set to OFF Each alarm may be programmed to operate with an independent setpoint setting or may be linked or trailing to operate at...

Page 14: ...20mA 0 1V or 0 10V link selectable output high value 20mA 1V or 10V in displayed engineering units e g if it is required to retransmit 20mA when the display indicates 500 then select 500 in this funct...

Page 15: ...ay at 4mA was 0 then ensure 0 is selected at SCL1 Press the F button to accept changes the display will show CAL End and will then move on to the next function CAL2 second scaling point for 2 point sc...

Page 16: ...g 4mA Go to the function and press and simultaneously a live display will now be seen CAL1 v If the live display is stable press the button The message will be seen F SCL1 If the live display is stab...

Page 17: ...reading of 500 and a ZERO RNGEreading of 10 the zero range function will allow the display to zero only if the current display reading is between 490 and 510 To perform a calibration zero press the a...

Page 18: ...operation will give a valley memory display PHi or PLo will flash before each display to give an indication of display type tARE display tare Short circuiting the remote input pins momentarily will a...

Page 19: ...ssential that the display is rescaled using CAL1 and CAL2 or USEREn4 and USEREN20 whenever the square root function is turned on or off When the square root facility is used the scaled displayed value...

Page 20: ...y to indicate 500 If set to OFF then the display value will continue to change when an input outside the table limits in encountered The instrument will extrapolate the reading using the slope of the...

Page 21: ...ain use the or v to make any changes to the value required 6 Press the F button the display will indicate P2 followed by the second P value in memory Repeat the process described in steps 4 and 5 unti...

Page 22: ...second point P2 4 7 Y2 105 h Repeat the filling procedure until all 10 points are recorded the results in this example are shown in the example diagram and table j The figures from the written table r...

Page 23: ...is set to LiuE With the alarm function set to LiuE the alarm relay operation will follow the live input based on the electrical inputs and scaling values used when the instrument is calibrated If the...

Page 24: ...peak hold function P HLd the display hold d HLd the peak memory Hi or valley memory Lo or the display value dISP For settings other than dISP operation a remote input or P button must also be set to t...

Page 25: ...ve caused the limit to be exceeded This display indicates that the actual input is higher than the input link settings e g a 10V input being used when the link settings are for a 0 to 1V input Check t...

Page 26: ...if aCCs function is set to ALL rEC_ Recorder output low limit Value in memory 0 rEC Recorder output high limit Value in memory 1000 drnd Display rounding selects resolution Value in memory 1 dCPt Dis...

Page 27: ...Overrange display warning flashing mode FLSHor or FLSH A1 A2 etc Alarm relay operation mode Liue tARE P HLd d HLd Hi LoordISP LiuE See following table REC Analog retransmission output mode Liue tARE P...

Page 28: ...Y1 P26 Y26 P2 Y2 P27 Y27 P3 Y3 P28 Y28 P4 Y4 P29 Y29 P5 Y5 P30 Y30 P6 Y6 P31 Y31 P7 Y7 P32 Y32 P8 Y8 P33 Y33 P9 Y9 P34 Y34 P10 Y10 P35 Y35 P11 Y11 P36 Y36 P12 Y12 P37 Y37 P13 Y13 P38 Y38 P14 Y14 P39 Y...

Page 29: ...the control output to keep the process variable at the setpoint Note that the control setpoint can be made available in FUNC mode and in some cases in easy access mode via the REC SPAC function descri...

Page 30: ...or below 20mA output Reading of 5 00 to 7 00 mA output decreasing as reading approaches 7 00 Reading 7 00 and higher 4mA output 7 00 1 000 100 0 Reading of 7 00 or below 20mA output Reading of 7 00 to...

Page 31: ...ing on the display is 6 8 then the error is 10 i e 10 of the span figure Proportional control output Error Proportional gain O ffset Proportional control output or mA 10 1 0 10 56 If the proportional...

Page 32: ...t which means that the setpoint cannot be reached Start with a low figure e g 10 0 and increase the value until a satisfactory response is reached Maximum setting is 100 0 100 Having separate high and...

Page 33: ...cur then the proportional offset value may no longer be valid for offset free control By introducing the integral action setpoint offset caused by the process load changes will be minimised Gradually...

Page 34: ...50 60Hz or DC 15 to 24V non isolated or DC 12V 24V or 48V isolated Supply type is factory configured Outputs 2 x Setpoint relays form A rated 5A at 240VAC Power Consumption AC supply 15 VA max DC sup...

Page 35: ...e manufacturer freight paid and if accepted for free repair will be returned to the customers address in Australia free of charge When returning the product for service or repair a full description of...

Page 36: ...crew terminals these terminals allow for wires up to 1 5mm2 to be fitted Use twisted pair overall screened cable for RS485 and 3 core overall screened cable for RS232 Ensure that the appropriate link...

Page 37: ...ode The format for this is as follows STX XYYYY CR Where STX is start of text character 2 Dec 02 Hex X SPACE 32 Dec 20 Hex for a positive value X 45 Dec 2D Hex for a negative value YYYY is the display...

Page 38: ...it Secondary Display Value STX SA CR e g BS M using Telix or similar address 1 Instructs the unit to send the secondary display value The value will equal the primary display value if the R INP functi...

Page 39: ...wledge 6 Dec 06 Hex H echo command received H 72 Dec 48 Hex A is the responding unit s address N is the setpoint number in ASCII e g 31 Hex would be alarm 1 etc X is SPACE for positive and for negativ...

Page 40: ...rriage Return 13 Dec 0D Hex If tare is not valid then the invalid command message will be returned refer Invalid Command later 9 Transmit Instrument Model and Version STX IA CR e g BI M using Telix or...

Page 41: ...e for computer communication ASCII Char Dec Hex ASCII Char Dec Hex NUL 000 00 SP 032 20 SOH A 001 01 033 21 STX B 002 02 034 22 ETX C 003 03 035 23 EOT D 004 04 036 24 ENQ E 005 05 037 25 ACK F 006 06...

Page 42: ...092 5C 124 7C 093 5D 125 7D 094 5E 126 7E _ 095 5F DEL 127 7F Modbus communications This addendum covers the use of Modbus RTU communications when using the LD4 monitor When using Modbus communication...

Page 43: ...rs per channel are used Note a value of 1 000 000 represents a positive overrange and 200 000 a negative overrange Registers 1 to 2 hold the display value registers 3 to 4 the valley memory lowest rea...

Page 44: ...mory low word 0X06 7 Display hold high word 0X07 8 Display hold low word 0X08 9 Alarm 1 high setpoint high word 0X09 10 Alarm 1 high setpoint low word 0X0A 11 Alarm 2 high setpoint high word 0X0B 12 A...

Page 45: ...put board has facilities for 4 20mA 0 1V and 0 10V retransmission and is factory supplied with all the necessary components for the output options required Two sets of PCB links are fitted to the circ...

Page 46: ...same specification and setup functions as the standard relays 1 and 2 Page 46 of 46 LD4LNMAN 1 0 1 COM COM RELAY 3 RELAY 3 RELAY 4 RELAY 4 COM COM NO NO NO NO OPTIONAL RELAY BOARD PLUGS INTO CONNECTOR...

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