AMALGAMATED INSTRUMENT RM4-AV Operation And Instruction Manual Download

Page: 4 / 45

1.3

Output options

•

1 or 2 extra relays (not configurable for PI control)

•

Dual output transistor switched 24VDC (non isolated).

•

Isolated 12 bit analog retransmission (single or dual analog output versions available) config-
urable for 4–20mA., 0–1V or 0–10V. The first analog output is configurable for retransmission
or PI control.

•

Isolated 16 bit analog retransmission configurable for retransmission or PI control plus extra
relay

•

12VDC or 24VDC (link selectable) isolated transmitter supply/excitation voltage (25mA
max.).

•

Isolated RS232, RS485 or RS422 serial communications (8 bit ASCII or Modbus RTU)

•

Isolated Optional outputs are available in certain combinations e.g. Analog output plus
isolated transmitter supply.

4 of

RM4AVMAN-2.1-0

Summary of Contents for RM4-AV

Page 1: ...00V RMS AC True RMS display Operation and Instruction Manual AMALGAMATED INSTRUMENT CO PTY LTD ACN 001 589 439 Unit 5 28 Leighton Place Hornsby Telephone 61 2 9476 2244 e mail sales aicpl com au NSW 2077 Australia Facsimile 61 2 9476 2902 Internet www aicpl com au ...

Page 2: ...l installation 5 3 Electrical installation 6 4 Function tables summary of setup functions 9 5 Explanation of functions 13 6 Calibration 32 7 Setting up the relay PI controller 34 8 Specifications 44 9 Guarantee and service 45 2 of 45 RM4AVMAN 2 1 0 ...

Page 3: ...ur RM4 has been factory set to a standard configuration Like all other RM4 series instruments the configuration and calibration is easily changed by the user Initial changes may require dismantling the instrument to alter PCB links other changes are made by push button functions Full electrical isolation between power supply input voltage and optional retransmission output is provided by the RM4 t...

Page 4: ...og output is configurable for retransmission or PI control Isolated 16 bit analog retransmission configurable for retransmission or PI control plus extra relay 12VDC or 24VDC link selectable isolated transmitter supply excitation voltage 25mA max Isolated RS232 RS485 or RS422 serial communications 8 bit ASCII or Modbus RTU Isolated Optional outputs are available in certain combinations e g Analog ...

Page 5: ...ard rails EN50022 Cut the DIN rail to length and install where required To install the instrument simply clip onto the rail as shown below To remove the instrument lever the lower arm downwards using a broad bladed screwdriver to pull the clip away from the DIN rail 44mm 91mm 141mm 4 3 2 I Rail RM4AVMAN 2 1 0 5 of 45 ...

Page 6: ...elow Refer to connection diagrams provided in this manual to confirm proper selection of voltage polarity and input type before applying 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 functioning Acknowledgement of correct operation may be obtained ...

Page 7: ...tacts 3 1 Remote input connections 4 3 2 I Remote input Choose momentary or latching switch to suit function selected The selected remote input function can be operated via an external contact closure via a switch relay or open collector transistor switch RM4AVMAN 2 1 0 7 of 45 ...

Page 8: ...ional Output Addendum booklet The main circuit board contains no user selectable links The AC volts input board plugs into the main board at connector P2 which is marked INPUT BOARD Link settings for the AC volts input board are as shown below If LK1 is in then any DC components in the waveform will be taken into account in the true RMS calculations If LK1 is out then any DC components in the inpu...

Page 9: ... Reset time delay for the designated alarm relay x 0 to 9999 0 See 4 1 5 6 18 Axn o or Axn c Alarm relay x action to normally open de energised or normally closed energised Axn o or Axn c Axn o See 4 1 5 7 18 AxSP or Axt1 etc Relay operation independent setpoint or trailing setpoint Optional AxSP or Axt1 etc AxSP See 4 1 5 8 18 brGt Display brightness level 1 to 15 15 5 9 19 duLL Display remote br...

Page 10: ...Any display value n a 5 22 22 CAL OFSt Calibration offset Any display value n a 5 23 23 ZERO RNGE Zero range limit Any display value or OFF OFF 5 24 23 CAL ZERO Zero reference point for ZERO RNGE operation n a n a 5 25 23 USER En4 n a n a n a 5 26 23 USER En20 n a n a n a 5 27 23 UCAL Uncalibrate n a n a 5 28 24 Pbut P button function for instruments with front P button NONE Hi Lo HiLo tARE or ZER...

Page 11: ... 5 38 29 dISP Display visual warning flashing mode FLSH or or FLSH 5 39 29 bAUd RAtE Baud rate for serial communications Optional 300 600 1200 2400 4800 9600 19 2 or 38 4 9600 5 40 30 PrtY Parity for serial communications Optional NONE EUEN or odd NONE 5 41 30 O Put Output for serial communications Optional dISP Cont POLL A buS or M buS Cont 5 42 30 Addr Instrument address for serial communication...

Page 12: ... n a AxHi n a AxHY n a Axtt n a Axrt n a Axn o or Axn c n a AxSP or Axt1 etc n a n a A1 A2 etc n a Ax OPEr n a n a n a Ax SP n a n a n a ctrI SPAN n a n a n a Ax PG n a n a n a Ax IG n a n a n a Ax IL n a n a n a Ax IH n a n a n a Ax bs n a n a n a Ax dc n a n a n a Ax dr n a n a n a 12 of 45 RM4AVMAN 2 1 0 ...

Page 13: ... Remove power from the instrument Hold in the button and reapply power The display will indicate as part of the wake up messages when the message is seen you can release the button 2 When the wake up messages have finished and the display has settled down to its normal reading press then release the button 1 When the wake up messages have finished and the display has settled down to its normal rea...

Page 14: ... this easy access also functions in the same manner for the PI control setpoint relay and or analog PI output if PI control is available The instrument must be set in the manner described below to allow the easy access facility to work 1 The R INP function must be set to SPAC or the ACCS function must be set to EASY 2 At least one alarm must have a setpoint nothing will happen if all the alarm set...

Page 15: ... value or OFF Default Value OFF Displays and sets the low setpoint value for the designated alarm relay x Note x will be replaced by the relay number when displayed e g A1Lo for relay 1 Use this low setpoint function if a relay operation is required when the display value becomes equal to or less than the low setpoint value To set a low alarm value go to the AxLo function and use the or v push but...

Page 16: ...o the AxHi function and use the or v push buttons to set the value required then press F to accept this value The high alarm setpoint may be disabled by pressing the and v push buttons simultaneously When the alarm is disabled the display will indicate OFF If the relay is allocated both a low and high setpoint then the relay will activate when the value displayed moves outside the band set by the ...

Page 17: ...e input must rise above the setpoint value plus the hysteresis value to reset the alarm e g if A1Lo is to 20 0 and A1Hy is set to 10 0 then the alarm output relay will activate when the display value falls to 20 0 or below and will reset when the display value goes above 30 0 i e at 30 1 or above The hysteresis units are expressed in displayed engineering units Example If A1Hi is set to 100 and A1...

Page 18: ... to A1n o alarm relay 1 will be open circuit when the display is outside alarm condition and will be closed short circuit across terminals when the display is in alarm condition 5 8 Alarm relay setpoint or trailing operation Display AxSP or Axt1 etc Range AxSP or Axt1 etc Default Value AxSP Relay operation independent setpoint or trailing setpoint this function will not be seen unless extra option...

Page 19: ... the duLL function and use the or v push buttons to set the value required then press F to accept this value The d oFF SECS function automatic display blanking or dulling will also cause the duLL function to appear if the d oFF SECS function is enabled i e set to any value other than 0 Example With duLL set to 4 and brGt set to 15 and the R INP function set to duLL the display brightness will chan...

Page 20: ... link settings Displays and sets the analog retransmission 4 20mA 0 1V or 0 10V link selectable output low value 4mA or 0V in displayed engineering units To set the analog output low value go to the REC_ function and use the or v push buttons to set the required value then press F to accept this selection Example If it is required to retransmit 4mA when the display indicates 0 then select 0 in thi...

Page 21: ...s undesirable to display to a fine tolerance To set the display rounding value go to the drnd function and use the or v push buttons to set the required value then press F to accept this selection Example If set to 10 the display values will change in multiples of 10 only i e display moves from 10 to 20 to 30 etc 5 18 Decimal point Display dCPt Range 0 0 1 etc Default Value 0 Displays and sets the...

Page 22: ...tput PI control Display rec ctrI Range on or OFF Default Value OFF Analog output mode seen only when analog output option is fitted This function allows selection of on or OFF for PI control analog output If set to OFF the analog output operates as a retransmission output and uses the functions described in this chapter If set to on the analog output operates as a PI control output When this funct...

Page 23: ...t value see section 6 3 5 25 Zero reference point for ZERO RNGE operation Display CAL ZERO Range n a Default Value n a Zero point calibration for ZERO RNGE function see section 6 4 5 26 4mA input scale Display USER En4 Range n a Default Value n a Not applicable to this software version 5 27 20mA input scale Display USER En20 Range n a Default Value n a Not applicable to this software version RM4AV...

Page 24: ... display readings alternatively the display can be forced to return to live measurement by pressing the F To reset the peak memory hold the P pressed for 3 seconds or remove power to the display Lo Valley memory Operates in the same manner as the Hi function above but operates on the lowest value in memory The indicator PLo will be seen prior to the valley memory value HiLo Peak valley memory Oper...

Page 25: ...mory will be reset Lo valley memory The minimum value stored in memory will be displayed Otherwise operates in the same manner as the Hi function described above HiLo toggle between Hi and Lo displays This function allows the remote input to be used to toggle between peak and valley memory displays The first operation of the remote input will cause the peak memory value to be displayed the next op...

Page 26: ...ions If set to ALL then access to all functions including calibration functions can be gained via FUNC mode 5 32 Setpoint access mode Display SPAC Range A1 A1 3 etc Default Value A1 Setpoint access sets the access via FUNC mode and easy alarm access mode to the alarm relay setpoints One relay is fitted as standard two more are optionally available Note relay 2 is not available in this instrument T...

Page 27: ... peak hold is released and the display value falls below the setpoint value d HLd display hold mode When d HLd is selected and the remote input is set to display hold d HLd then the alarm relay will be held in its present state activated or de activated until the display hold is released and the display is free to change Hi peak max memory mode When Hi is selected and the remote input is set to pe...

Page 28: ... retransmission value will remain fixed at the held value although the 7 segment display value will be free to alter The held retransmission output can be cleared by closing the remote input switch for another operation or by removing power from the instrument Note In this mode the bargraph will show a zero reading until the remote input is operated for the first time after switch on Hi peak max m...

Page 29: ... rises above 1000 the message or will flash on and off or the display value will flash on and off instead of the normal display units see dISP function 5 39 This message can be used to alert operators to the presence of an input which is above the high limit If this function is not required it should be set to OFF by pressing the and v buttons simultaneously at this function 5 39 Display visual wa...

Page 30: ... NONE EUEN or odd The parity should be set to match the device being communicated with 5 42 Output mode for optional serial communications Display O Put Range dISP Cont POLL A buS or M buS Default Value Cont Set serial interface mode seen only with serial output option Refer to the separate RM4 Din Rail Meter Optional Output Addendum booklet supplied when optional outputs are fitted Allows user to...

Page 31: ...r dISP Default Value LiuE Seen only with serial output option applies only when O Put function set to Cont Refer to rEC function The HiLo selection in this functions allows both the peak and valley memories to be transmitted The peak value will be transmitted followed by a space then the valley value 5 45 Error Messages This display indicates that the input signal is higher than the maximum rated ...

Page 32: ...t that SCL2 will be seen instead of SCL1 It is essential that the live input is different in value to the CAL1 input Note it is essential that there is at least a 10 of full scale difference between the CAL1 and CAL2 inputs if this is not the case then a SPAN Err message will be seen and the calibration point will not be accepted The procedure for entering the second scaling point is 1 Ensure that...

Page 33: ... operations becomes greater than the zero range value the instrument will reject the zero operation and a ZERO RNGE Err message will be seen To allow a zero operation beyond this point either the ZERO RNGE function value will need to be raised or a new zero reference point introduced via the CAL ZERO function If repeated zero operations are required the ZERO RNGE function should be set to OFF or a...

Page 34: ...nctions chapter for details of operation when Ax AL is selected If Ax tP is selected then the chosen relay will operate in pulse width control mode If Ax Fr is selected then the chosen relay will operate in the frequency control mode Pulse width control operates by controlling the on to off time ratio of the relay In a typical application this would be used to control the length of time for which ...

Page 35: ...ol span value will be common to all control relays i e if more than one control relay output is being used then each of these relays operates from the same control span setting The span value defines the range over which the input must change to cause a 100 change in the control output when the proportional gain is set to 1 000 This function affects the overall gain of the controller and is normal...

Page 36: ...he setpoint The proportional gain action can be reversed by setting a negative gain i e with a negative gain the on time will reduce as the error increases With a proportional gain of 1 000 and an error of 10 or more with control span set at 10 the controller will increase the frequency by 100 if possible With a proportional gain of 0 500 an error of 10 or more with control span set at 10 will cau...

Page 37: ...ncreasing as value approaches 80 Reading 80 or above relay permanently off 70 0 500 50 0 Reading 50 or below relay permanently on Reading 50 to 70 relay pulses with off time increasing as value approaches 70 Reading 70 relay pulses at 50 on and 50 off Reading 70 to 90 relay pulses with off time increasing as value approaches 90 Reading 90 or above relay permanently off 70 1 000 50 0 Reading of 60 ...

Page 38: ...ion to try to correct at the rate of 20 per minute Too high an integral gain will result in instability To low an integral gain will slow down the time taken to reach the setpoint The optimum setting will depend on the lag time of the process and the other control settings Start with a low figure e g 0 200 and increase until a satisfactory response time is reached The integral gain figure has unit...

Page 39: ...put bias setting to maintain the control process setpoint value For example with a bias Ax bs set at 50 minimum limit set at 20 and a maximum limit of 30 the actual bias when the process is at the setpoint may be anywhere between 30 and 80 i e Integral control is being used to alter the bias setting in order to maintain the process at the setpoint In this case the minimum term will allow the bias ...

Page 40: ...rease the proportional gain until a steady process cycling is observed Once the steady cycling state is achieved note the difference between the display value and the control setpoint value Gradually increase or decrease the bias value until the displayed value matches or cycles about the control setpoint value Gradually increase the integral gain until the process begins to oscillate Then reduce ...

Page 41: ... with PI pulse width control refer to the appropriate sections as shown below for these common functions Ax SP Control setpoint refer to section 7 2 ctrI SPAN Control span refer to section 7 3 Ax PG Proportional gain refer to section 7 4 Ax IG Integral gain refer to section 7 5 Ax IL Integral control low limit refer to section 7 7 Ax IH Integral control high limit refer to section 7 6 Ax bs PI con...

Page 42: ...tly off 70 0 500 50 0 Reading 50 or below relay pulses at maximum frequency Reading 50 to 90 relay pulses with frequency decreasing as value approaches 90 period increased by 50 at 70 compared to minimum period e g if minimum period is 4 seconds the period at 70 will be 6 seconds Reading 90 or above relay permanently off 70 1 000 50 0 Reading of 60 or below relay permanently off Reading of 60 to 8...

Page 43: ... steady cycling state is achieved note the difference between the display value and the control setpoint value Gradually increase or decrease the bias value until the displayed value matches or cycles about the control setpoint value Gradually increase the integral gain until the process begins to oscillate Then reduce the integral gain slightly to regain the control without this added oscillation...

Page 44: ...rammable N O or N C 8 2 Optional outputs Second relay Rated 0 5A resistive 30VAC or DC May be configured as form A or form C if the third relay is the only option fitted Third relay Rated 0 5A resistive 30VAC or DC form A Analog output Isolated 4 to 20mA 0 to 1V or 0 to 10V link selectable 12 or 16 bit versions available 4 20mA will drive into resistive loads of up to 800Ω First analog output can ...

Page 45: ...o the manu facturer 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 the fault and the mode of operation used when the product failed must be given In any event the manufacturer has no other obligation or liability beyond replacement or repair of this product Mod...

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AMALGAMATED INSTRUMENT RM4-AV, Operation And Instruction Manual

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