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7. FUNCTIONS

IMSRM02-E6

88

(7) Loop break alarm (LBA)

The loop break alarm (LBA) function is used to detect a load (heater) break or a failure in the external
actuator (magnet relay, etc.), or a failure in the control loop caused by an input (sensor) break.
This function monitors the measured value (PV) variation at LBA setting time intervals from the time
the output exceeds 100 % (or output limiter: high limit) or falls below 0 % (or output limiter: low
limit), then detects a heater or input break.

■

■

■

■

Alarm action

The LBA function produces the alarm when any of the following causes occurs.

Heat control (LBA triggering width: 2

°°°°

C [

°°°°

F] fixed)

z

z

z

z

When the output falls below 0 % (or output limiter: low limit)

For direct action: This alarm is produced when the measured value (PV) does not rise beyond the

LBA triggering width within the LBA setting time.

For reverse action: This alarm is produced when the measured value (PV) does not fall below the

LBA triggering width within the LBA setting time.

z

z

z

z

When the output exceeds 100 % (or output limiter: high limit)

For direct action: This alarm is produced when the measured value (PV) does not fall below the

LBA triggering width within the LBA setting time.

For reverse action: This alarm is produced when the measured value (PV) does not rise beyond the

LBA triggering width within the LBA setting time.

Heat/cool control (LBA triggering width: 2

°°°°

C [

°°°°

F] fixed)

z

z

z

z

When the heat-side output exceeds 100 % (or output limiter: high limit) and the cool-side
output falls below 0 %

This alarm is produced when the measured value (PV) does not rise beyond the LBA triggering
width within the LBA setting time.

z

z

z

z

When the heat-side output falls below 0 % and the cool-side output exceeds 100 % (or output
limiter: low-limit)

This alarm is produced when the measured value (PV) does not rise beyond the LBA triggering
width within the LBA setting time.

If the autotuning function is used, the LBA setting time twice as large as the integral time is
automatically set. The LBA setting time does not change even if the integral time is
changed.

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Содержание SR Mini System

Страница 1: ...SR Mini SYSTEM IMSRM02 E6 High performance Multi point Control System SR Mini SYSTEM Hardware Instruction Manual RKC INSTRUMENT INC...

Страница 2: ...All Rights Reserved Copyright 1994 RKC INSTRUMENT INC...

Страница 3: ...on to prevent electric shock fire or damage to instrument and equipment z This instrument must be used in accordance with the specifications to prevent fire or damage to instrument and equipment z Th...

Страница 4: ...ified torque found in the manual to avoid electric shock fire or malfunction z For proper operation of this instrument provide adequate ventilation for heat dispensation z Do not connect wires to unus...

Страница 5: ...MODULES 19 3 1 Basic Configuration 19 3 2 Common Items of Each Module 20 3 3 PCP Module 25 3 4 TIO Module 33 3 5 CT Module 42 3 6 DI Module 44 3 7 DO Module 46 4 MOUNTING 51 4 1 Mounting Environment...

Страница 6: ...2 Module Replacement Procedure 71 7 FUNCTIONS 75 7 1 Inputs 75 7 2 Settings 77 7 3 Controls 78 7 4 Alarms 83 7 5 Contact Inputs 90 8 SPECIFICATIONS 92 8 1 PCP Module 92 8 2 TIO Module 95 8 3 CT Module...

Страница 7: ...he Model Code P 3 See 3 DESCRIPTION OF EACH MODULES P 19 See 4 MOUNTING P 51 Setting of all data Operation Generation of the host communications program Setting of all data Operation See Operation Pan...

Страница 8: ...SYSTEM control unit Required number of sets Hardware Instruction Manual IMSRM02 E 1 copy Communication Instruction Manual IMSRM04 J 1 copy DIN rail holding clips 2 clips unit See this instruction manu...

Страница 9: ...R KC I NST RUM ENT INC MAD E I N J APAN INP UT OU TPU T 0 TO 400 REL AY K 250 V A C 3 A MO DEL H TIO B FK 02 M N N NO 9 5C0 1011 SUPP LY RKC IN STRU MEN T I NC MA DE IN J APA N SYS TEM NO U NIT NO F0...

Страница 10: ...an be connected A Deviation High B Deviation Low C Deviation High and Low D Deviation Band E Deviation High with alarm hold F Deviation Low with alarm hold G Deviation High and Low with alarm hold H P...

Страница 11: ...function can be allocated by the customer on the operation panel The customer who do not have the operation panel needs to add this settings to the customer s host communication program DO1 to DO4 is...

Страница 12: ...ol output Heat side 3 M Relay contact output V Voltage pulse output for SSR drivers D Open collector output T Triac output Continuous current output See Output Code Table Continuous voltage output See...

Страница 13: ...For other types No function is selected for cool side control output and only heat side control output can be selected 4 Output type is relay contact output 5 First second alarm types are those select...

Страница 14: ...lect for type B 3 Only possible to select for type D 4 Both heat side and cool side outputs can be selected by using the heat cool control type D For other types No function is selected for cool side...

Страница 15: ...03 0 0 to 700 0 C E A3 0 to 1800 F T 09 0 200 C T 08 0 400 C T 10 200 200 C T JIS IEC T 08 0 0 400 0 C T A7 0 0 to 700 0 F T A9 0 to 700 F T B1 300 to 400 F N IEC N 02 0 to 1300 C N A1 0 to 2300 F PLI...

Страница 16: ...ach CT module can be allocated by the customer through operation panel But those who do not have operation panel are necessary to add this settings to the customer s host communication program CT6 CT5...

Страница 17: ...tput Type A 4 points common Type B Independent common D Open collector output 8 points common Initial Code Table DO function can be allocated by the customer through operation panel But those who do n...

Страница 18: ...host computer z z z z Example 2 Connection with RKC operation panel OPM PCP module Host computer Function modules 10 modules max Control unit Up to 16 units RS 422A RKC standard communication RS 232C...

Страница 19: ...OPL A IMSRM11 E OPM Z 191 specifications IMSRM21 E OPM H Z 191 specifications IMSRM26 E and the Communication Instruction Manual Supplementary Information Initialize Settings Extended Communications I...

Страница 20: ...modules must be RS 422A In addition the maximum number of control units that can be connected is 16 When connected to the OPM Z 191 specifications or the OPM H Z 191 specifications Up to 8 units RS 4...

Страница 21: ...n the control unit the maximum number of function modules mounted becomes less than 10 If any function module is added to the existing modules note that the total current consumed by all of the functi...

Страница 22: ...odules mainly TIO modules is mounted at a power supply voltage of 12 V z z z z When TIO D modules are mounted together with other function modules As the TIO D module consumes an output current of 80...

Страница 23: ...ent described above does not exceed the maximum power supply capacity 1000 mA up to 10 function modules can be mounted 2 Assignment of channels and functions Module channel numbers are automatically a...

Страница 24: ...e top for each block of the functions assigned For this reason duplicate alarms in the same channel and of the same type cannot be output However the above does not apply to the DO C module 3 Others T...

Страница 25: ...k and each modules are connected with each other by the connectors of mother block Control unit using the PCP module as the basic module and connecting the necessary types of modules as necessary It i...

Страница 26: ...These three types are the blocks for single type function modules for double type function modules and for power supply CPU modules PCP modules As the control unit can be detached from the mother bloc...

Страница 27: ...nce Dimensions mm Remarks Single type 19 24 96 Mother block dedicated to single type module connection Double type 19 48 96 Mother block dedicated to double type module connection PCP module exclusive...

Страница 28: ...operation 6 Modular connector 1 RS 232C or RS 422A connection with the host computer or operation panel RS 422A connection with other control unit 7 Modular connector 2 RS 422A connection with other...

Страница 29: ...onnector Connector for power supply and bus connection Double type module No Name Description 1 FAIL lamp Red ON during abnormal operation OFF during normal operation 2 RUN lamp Green Flashing during...

Страница 30: ...Double type module With the terminal cover fixed to the module With the terminal cover removed from the module With the terminal cover fixed to the module With the terminal cover removed from the modu...

Страница 31: ...nts z z z z PCP B type Module with two DO points and three DI points FAIL output DO1 DO2 DO3 DO4 Power supply Unused Host computer or operation panel Connection with other control unit Temperature ala...

Страница 32: ...13 Power supply terminals AC 200 to 240V L N 12 13 AC 100 to 120V L N 12 13 11 Unused terminal 14 15 Unused terminal Ground terminal 11 12 13 14 15 1 2 3 4 5 6 7 8 9 10 OUT1 3 OUT2 4 5 6 OUT3 7 OUT4 8...

Страница 33: ...urs in any of the function modules in the control unit the FAIL output will also be output However in this situation the FAIL lamp will not light If the composition of the control unit is changed due...

Страница 34: ...ence Rating 250 V AC 0 1 A Resistive load CE UL CSA approved instrument 30 V DC 0 1 A Open collector output Load voltage 12 to 24 V DC Maximum load current 0 1 A If there is no heater break alarm func...

Страница 35: ...f this device is actually selected Therefore pay attention to this delay time if the device is used together with a sequencer etc External power supply 24 V DC is required for digital input Memory are...

Страница 36: ...nding on the peripheral equipment to be connected Connection with dedicated operation panel RS 422A Multi drop connection of control units RS 422A Connection with host computer RS 232C or RS 422A Two...

Страница 37: ...rame with mother block removed 1 2 Data bit configuration 3 4 Communication speed OFF OFF 8 bit without parity OFF OFF 2400 bps OFF ON 7 bit even parity OFF ON 4800 bps ON OFF 7 bit odd parity ON OFF...

Страница 38: ...PCP module Setting range 0 to F hexadecimal 0 to 15 address number Unit address setting switch Set the unit address such that it is different to the other addresses on the some line Otherwise problems...

Страница 39: ...e For details on the limited number of TIO modules connected to the PCP module see P 15 A type 1 channel type OUT Heat OUT Alarm Option CT Option IN Not provided for the E H and R type B and P type 2...

Страница 40: ...RTD input TC input Input terminals 1 2 3 4 1 2 NO NO 6 7 CT 8 9 10 B B A 8 9 1 2 1 2 1 2 1 2 1 2 NO 1 2 1 2 1 2 3 4 3 4 NO 3 4 3 4 3 4 Output 1 CH1 Output 2 CH2 5 6 7 B B A 5 6 8 9 10 B B A 8 9 Input...

Страница 41: ...utput Voltage pulse output Voltage current output Triac output 1 2 1 2 NO 1 2 1 2 1 2 3 4 3 4 NO 3 4 3 4 3 4 6 7 CT 8 9 10 B B A 8 9 CH1 CH2 Open collector output Relay contact t t Voltage pulse outpu...

Страница 42: ...1 CH1 Output 2 CH2 5 6 7 B B A 5 6 8 9 10 B B A 8 9 Input 1 CH1 Input 2 CH2 Open collector output Relay contact t t Voltage pulse output Voltage current output Triac output Open collector output Relay...

Страница 43: ...e mounted together with other type modules channel numbers are assigned automatically to these modules in order from the left Channel number assignment Input type Select any input type of thermocouple...

Страница 44: ...lly to these modules in order from the left Channel number assignment Output type Any output type of relay contact output voltage pulse output voltage output current output triac output or open collec...

Страница 45: ...sistor sink output uses switching between the transistor emitter and collector An external power supply of 12 to 24 V DC is connected to the load in series Open Collector Output Wiring Example It is p...

Страница 46: ...46 and for details on setting alarms see the Operation Panel Instruction Manual OPM IMSRM03 E OPL A IMSRM11 E OPM Z 191 specifications IMSRM21 E OPM H Z 191 specifications IMSRM26 E and the Communicat...

Страница 47: ...ications IMSRM26 E and the Communication Instruction Manual Supplementary Information Initialize Settings Extended Communications IMSRM07 E 6 Heater break alarm function Option The heater break alarm...

Страница 48: ...urrent measurement Up to six CT input points can be input per module In addition the following two types of CT module are available depending on the heater capacity used 0 to 30 A and 0 to 100 A Speci...

Страница 49: ...of a heater break by connecting two or more CT sensors even when heaters are delta connected For a heater capacity of 30 A or less the CT module for 0 to 30 A CT sensor CTL 6 P N using type should be...

Страница 50: ...mory area selection control RUN STOP selection or alarm interlock release of the control unit by using external contacts etc Up to eight input points can be configured for each DI module DI A type 3 6...

Страница 51: ...n or release can be performed depending on the open or close state of terminal numbers 1 to 8 For memory area selection configure an external contact circuit or use a contact output signal from the se...

Страница 52: ...5 to 8 4 points common DO 1 to 8 8 points common DO 1 to 4 All points independent common Relay contact output type Open collector output type Relay contact output type 3 7 2 Terminal configuration DO...

Страница 53: ...he heater current detected by the current transformer is within the heater break alarm setting range z z z z Burnout alarm output This alarm is output for each channel when the input sensor breaks or...

Страница 54: ...itive terminal of the power supply to the common line of each output In using the open collector output an external power supply of 24 V DC is required Note that if this power supply is not connected...

Страница 55: ...m type Temperature alarm 1 Temperature alarm 2 Heater break alarm HBA z Digital output DO grouping Burnout alarm Loop break alarm LBA Unused No alarm DO A module Digital output 1 Digital output 2 Digi...

Страница 56: ...MSRM03 E OPL A IMSRM11 E OPM Z 191 specifications IMSRM21 E OPM H Z 191 specifications IMSRM26 E and the Communication Instruction Manual Supplementary Information Initialize Settings Extended Communi...

Страница 57: ...han 45 or more than 85 RH Rapid changes in ambient temperature which may cause condensation Corrosive or inflammable gases Direct vibration or shock to the mainframe Water oil chemicals vapor or steam...

Страница 58: ...pre heat the instrument using space heaters Panel vibration or impact considerations Isolate the panel from external vibration or shock using rubber vibration insulators If the electromagnetic switche...

Страница 59: ...ts etc PCP module PCP module PCP module Function modules Function modules Function modules Separation of 50 mm or more Separation of 50 mm or more Separation of 50 mm or more Separation of 50 mm or mo...

Страница 60: ...02 4 48 With the terminal cover fixed to the module 9 48 96 3 5 100 102 With the terminal cover fixed to the module 9 24 96 3 5 100 102 With the terminal cover fixed to the module Dotted line section...

Страница 61: ...nting The mounting depth of each module is 108 mm from the mounting surface inside the panel to the front of the module with the module mounted on the DIN rail However when modular connector cables ar...

Страница 62: ...le module mounting Unit mm Single type module 2 M3 77 2 Remove the module from the mother block For details of removing the module see 4 6 Removing the Module Mainframe P 59 3 Connect the mother block...

Страница 63: ...ther block 3 Attach the top bracket of the mother block to the DIN rail and push the lower section into place on the DIN rail 2 4 Slide the locking devices up to secure the mother block to the DIN rai...

Страница 64: ...mainframe opening on top of the mother block tab 1 2 Snap the lower part of module mainframe on to the mother block 2 Single type module Double type module A snapping sound will be heard when module...

Страница 65: ...d so it is in case of single type module 4 7 Terminal Covers Terminal covers snap on to protect the module terminals These covers can be permanently secured to the module using a 3 8 mm self tapping r...

Страница 66: ...effective noise reduction Always install the noise filter on a grounded panel Minimize the wiring distance between the noise filter output and the instrument power supply terminals to achieve the most...

Страница 67: ...When signal source is grounded ground the shield to the signal source side Example When signal source is not grounded ground the shield to the instrument side Ground wiring Ground the instrument sepa...

Страница 68: ...ctors are securely attached to the modules Securely tighten the terminal screws to ensure that loose screws do not become the source of mis operation Leakage current at 24 V DC input When a two wire s...

Страница 69: ...Example When twelve SSR units are connected to six TIO B voltage pulse output type modules Connecting terminals Common minus wire SSR SSR SSR SSR SSR SSR SSR SSR SSR SSR SSR SSR Six TIO B module Volt...

Страница 70: ...cing the module with a new one of the different module type please contact RKC sales office or the agent as it becomes necessary to initialize the module etc For details on replacing the instrument ca...

Страница 71: ...tion to its original specifications Data transmission and reception TX RX lamps not lit up Operation panel or host computer power not on Check the power Operation panel connection cable disconnected I...

Страница 72: ...defect Replace mother block No outputs operate System set to STOP mode Switch to RUN mode System set to Unused mode Switch to Used mode Load power not supplied Supply power Load power supply voltage o...

Страница 73: ...erly tightened Retighten System set to Unused mode Switch to Used mode Input circuit CPU breakdown Replace module Error from certain module on Head mother block defect in error module Replace mother b...

Страница 74: ...specifications Maximum number of linkable units exceeded Eliminate a module FAIL lamp lit up CPU section breakdown Replace module Electrical current read in value abnormal CT sensor different from mod...

Страница 75: ...r of linkable units exceeded Eliminate a module FAIL lamp lit up CPU section breakdown Replace module No digital input change System set to Unused mode Switch to Used mode Main CPU section breakdown R...

Страница 76: ...other block No outputs operate Load power not supplied Supply power Load power supply voltage outside rating Change to voltage within rating Main CPU section breakdown Replace PCP module Bus line defe...

Страница 77: ...on PID constants alarm set values etc is managed by the PCP module it is necessary to re enter and re set all data when the PCP module is replaced However re entry and re set are not required in the...

Страница 78: ...en replacing the module always use the same model of module Before replacing the present module with a new one set channel operation mode used in the former to Unused mode When the control unit specif...

Страница 79: ...the module as before For more details of the operation methods etc see the Operation Panel Instruction Manual OPM IMSRM03 E OPL A IMSRM11 E OPM Z 191 specifications IMSRM21 E OPM H Z 191 specification...

Страница 80: ...the power to the control unit 2 Remove the module mainframe from the mother block 3 Slide the other modules then separate the mother block from the mother block connector 1 4 Pull down the locking de...

Страница 81: ...the PV bias should be set to PV bias 0 5 400 0 5 2 C 2 Temperature rise completion function During the sampling of temperature input when the measured temperature value PV comes within the temperatur...

Страница 82: ...This is a software filter which reduces input value variations caused by noise If the time constant of this filter is set appropriately to match the characteristics of the controlled object and the no...

Страница 83: ...5 4 3 2 1 Memory area Control area Set value SV First alarm Second alarm Heat side proportional band P Integral time I Derivative time D Control response parameter Cool side proportional band Deadban...

Страница 84: ...tting deteriorates In brilliant PID control a form of response to setting can be selected from among Fast Medium and Slow with PID constants remaining unchanged so as to be in good response to disturb...

Страница 85: ...le when selecting Fast Depending on the controlled object specify Slow if overshoot should be avoided 3 Fuzzy function The fuzzy function is effective to smoothly start operation and to limit overshoo...

Страница 86: ...5 Heat cool control In heat cool control only one module enables heat and cool control For example this is effective when cool control is required in extruder cylinder temperature control Set value SV...

Страница 87: ...g caused by this hunting may not be preferable depending on the controlled object In such a case the desired AT bias is set If it is set another set value SV to activate the autotuning function AT poi...

Страница 88: ...on during transfer from manual mode to auto mode When manual mode is transferred to auto mode the manipulated output changes to that calculated with respect to the set value Manipulated output Auto mo...

Страница 89: ...m OUT Common OUT Common 24 V DC Load 1 Deviation alarm If the deviation Measured value PV Set value SV reaches the alarm set value the alarm status is set up Consequently if the set value SV changes t...

Страница 90: ...Alarm set value Alarm status Alarm status Deviation z z z z Deviation high low alarm When the absolute deviation Measured value PV Set value SV is the alarm set value or more less the alarm status is...

Страница 91: ...he alarm relay contact may repeatedly turn on and off due to input fluctuations If the alarm differential gap is set repeated turning on and off of the relay contact can be prevented High alarm Deviat...

Страница 92: ...if the measured value PV is in the alarm range when the power is on or the operation mode is switched to Run from Stop The alarm function is held until the measured value PV goes out of the alarm sta...

Страница 93: ...rm area and the alarm is set up To hold this alarm the alarm re hold function can be used effectively In the application where the set value is changed continuously by a host computer or a similar equ...

Страница 94: ...LBA triggering width within the LBA setting time z z z z When the output exceeds 100 or output limiter high limit For direct action This alarm is produced when the measured value PV does not fall belo...

Страница 95: ...refore check the control loop in order The LBA function is not activated when any of the following cases occurs When the autotuning function is being executed When operation mode is not in Normal mode...

Страница 96: ...nput circuit diagram Dry contact input circuit diagram Contact Contact Common Memory area selection An external contact signal selects one control area from among eight stored control areas Control RU...

Страница 97: ...FF OFF OFF OFF ON a When the alarm status is set up the alarm status output becomes on b When the alarm interlock release input is set to on in the alarm status the alarm status output does not become...

Страница 98: ...thium battery for RAM backup approximate ten years life for data retention Power input Power supply voltage 100 to 120 V AC 50 60 Hz 200 to 240 V AC 50 60 Hz or 24 V DC Specify when ordering Power sup...

Страница 99: ...Load voltage 12 to 24 V DC Maximum load current 0 1 A point 0 8 A common 1 Specify either relay contact output or open collector output when ordering 2 Digital output can be selected from the followi...

Страница 100: ...arity Data types ASCII 7 bit code System setting items Temperature alarm first alarm and second alarm Deviation high alarm Deviation low alarm Deviation high low alarm Deviation band alarm Deviation h...

Страница 101: ...put lead 20 or less Only for RTD input Input filter First order lag digital filter Time constant Settable from 1 to 100 seconds Setting 0 Filter off PV bias 5 00 to 5 00 of span Action at input break...

Страница 102: ...ore Rated load Contact type 1a contact Cycle 1 to 100 seconds variable Specify when ordering Voltage pulse output Rating 0 12 V DC Allowable load resistance 600 or more Cycle 1 to 100 seconds variable...

Страница 103: ...span Deviation high low alarm Deviation band alarm Deviation high low alarm with alarm hold Same as input range Process high alarm Process low alarm Process high alarm with alarm hold Process low alar...

Страница 104: ...to 7200 seconds LBA deadband LBD Same as input range LBD is automatically as the value of two times of integral value after the completion of autotuning Alarm output This module outputs alarm status t...

Страница 105: ...ng Current transformer is sold separately Accuracy of heater current measurement 5 of input value or 2 A The value whichever is greater Heater break alarm function Setting range 0 0 to 100 0 A Corresp...

Страница 106: ...ber of common points 4 points common Isolation method Photocoupler isolation External connection Terminals Functions Memory area transfer Possible to transfer eight memory areas Control RUN STOP trans...

Страница 107: ...ive load 4 A common Resistive load Only for DO A type Minimum switching voltage current 5 V DC 10 mA Contact type 1a contact Open collector output Load voltage 12 to 24 V DC Maximum load current 0 1 A...

Страница 108: ...M02 E6 102 Self diagnostic Check item RAM check Watchdog timer Operation at error occurrence in self diagnosis FAIL lamp lights Reset state General specifications Dimensions 24 W 96 H 100 D mm Weight...

Страница 109: ...nals 1000 V AC for 1 minute Withstand noise 1500 V peak to peak Pulse width 1 s Rise time 1 ns By noise simulator Withstand vibration Frequency 5 to 9 Hz Amplitude 1 5 mm Frequency 9 to 150 Hz Acceler...

Страница 110: ...104 IMSRM02 E6 MEMO...

Страница 111: ...The 1st edition Nov 1994 The 6th edition Aug 2000...

Страница 112: ...IMSRM02 E6 AUG 2000 RKC INSTRUMENT INC HEADQUARTERS 16 6 KUGAHARA 5 CHOME OHTA KU TOKYO 146 8515 JAPAN PHONE 03 3751 9799 81 3 3751 9799 E mail info rkcinst co jp FAX 03 3751 8585 81 3 3751 8585...

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