Type A68RD3N/4N,A1S62RD3N/4N Pt100 Input Module
Contents
1. 5 3 5 2 1 Program to read a detected temperature value 5 3 6 TROUBLESHOOTING 6 1 6 3 6 1 Error Code 8 6 1 6 2 Ifthe RUN LED Flashes Turned 6 2 6 3 If the WDT Error Flag is 6 2 6 4 Ifthe READY Flag is not 6 2 6 5 Ifthe Write Data Error is 6 2 6 6 If the Disconnection Detected is 6 3 67 If a CPU Cannot Read Detected Temperature 6 3 6 8 If the Temperature Input Values do not Correspond to the Temperature Detection 6 3 APPENDICES 1 8 APPENDIX 1 COMPARISON PERFORMANCE SPECIFICATIONS BETWEEN CONVENTIONAL MODELS AND APP 1 APPENDIX 2 PRECAUTIONS WHEN REPLACING THE CONVENTIONAL MODELS APP 2 APPENDIX 3 STANDARD RESISTANCE VALUE OF PLATINUM RESISTANCE 5 2 31 1997 JIS Pt100 22. 7 3 __5 6 oe io SLD _2 13 ts _ 6 20 __22 23 c N SLD ANALOG GND F 4 PRE OPERATION SETTINGS AND PROCEDURES MELSEC A gt N 2 5 ce z gt 8 X A 2 Terminal Block Layout A1862RDAN Terminal number Signal TEST TEST gt SLD 2 Blank Blank a2 iv 5 A gt gt 3 n Description Application ON In normal operation Normal mode Flash Write data error occuring OFF 5 VDC power OFF or error occuring Operating status display LED RUN LED Flicker When the OFFSET GAIN setting switch is set to OFFSET or GAIN this LED will flicker at 0 5 second intervals OFF OFFSET GAIN setting switch set to SET Selects the channei for adjusting the offset and gain for error compensation When A68RD3N AN is used the 0 9 position setting is not managed Channel select switch Factory Set A68RDSN AN 0 A1S62RD3N 4N CH1 Sets the offset value and gain value for the test mode Factory set SET 1 OFFSET position Offset value compensation mode OFFSET GAIN setting 2 GAIN position Gain value compensation mode Switch 3 SET position Offset value gain value save mode The temperature detection value at
3. 4 ojo o 33 Old JIS JPt100 JIS 1604 1981 Unit Q Tege Temeer 200 soo C o 6047 199 29 20 02 9 9 9 34 42 30 12 12 08 100 38 2645 270 38 90412 179 8 2100 oss weor APP 3 APPENDICES APPENDIX 4 OUTSIDE DIMENSIONS 41 A68RD3N 4 2 0 17 N3x0 5x6 Terminal screw 2 0 08 a Sl d 6 0 24 aM 10 0 39 42 106 4 18 0 17 131 5 16 0 99 37 5 1 48 Unit mm in 0 71 APP 4 APPENDICES MELSEC A 42 A68RD4N T 4 2 0 17 N3x0 5x6 N Terminal screw AQ c 6 0 24 10 0 39 2 106 4 18 0 17 131 5 16 0 99 Unit mm in APP 5 APPENDICES MELSEC A 43 A1S62RD3N 0 26 93 6 3 69 130 5 12 E E E E 9 8 Lo 34 5 1 36 Unit mm in APP 6 APPENDICES 5 44 A1S62RD4N 130 5 12 0 2 93 6 3 69 Unit mm in APP 7 WARRANTY Please confirm the following product warranty details before using this product 1 Gratis Warranty Term and Gratis Warranty Range If any faults or defects hereinafter Failure found to be the responsibility of Mitsubishi occurs during use of the product within the grat
4. RD3N AN error compensation See Section 4 4 Store the sequence program that con trols the RD3N 4N in the PLC CPU Complete Tt See Section 5 4 PRE OPERATION SETTINGS AND PROCEDURES 4 2 Handling Instructions The following explains the handling instructions for the RD3N 4N 1 Since the case and terminal block of the module are plastic do not drop the module Hard impacts must not be applied either 2 Do not remove the printed circuit boards from their housing Otherwise it will cause fault 3 Make sure that no conductive debris can enter the module If it does make sure that it is remeved 4 Tighten the terminal screws as specified below Tightening Torque Range Screw Position A68RD3N AN is used A1S62RD3N 4N is used 78 10 118 78 to 118 ecm Module installation screw M4 screw M4 screw 39 to 59N cm 59 to 88N cm M3 screw M3 5 screw 78 to 118N cm 78 to 118N cm Terminal block terminal screw M4 screw M4 screw Terminal block installation screw 4 PRE OPERATION SETTINGS AND PROCEDURES 43 Nomenclature MELSEC A The following gives the nomenclature of each part of the RD3N 4N Bu pl rH n DU E 19 gt 21 E pa RUN O E m Terminal Layout Terminal number A68RD3N A68RDAN TEST TEST Signal name
5. ATNCPU A2NCPU S1 ASNCPU ATSCPU 81 e ATSJCPU S3 A2CCPU S1 S30 S1 ASACPU ATSHCPU A2SHCPU S1 e ATSJHCPU S8 A2USHCPU S1 Q2ACPU S1 Q2ASCPU S1 Q2SHCPU S1 Q2ASCPU S1 eQ2ASHCPU S1 Q4ARCPU QO2CPU A QO2HCPU A 006 1 It includes a PLC CPU with a link function 2 The A73CPU S3 is used by installing the A68RD3N 4N in the extension base unit 2 Number of Installation Modules There are no restrictions on the number of modules to be installed as long as the occupied number of I O points is within the range of num ber of I O points of the applicable CPU 2 SYSTEM CONFIGURATIONS 3 Installation Slots a A module can be installed in any slot in a base unit with an ception of the following cases If a module is installed an extension base A55B A58B 1552 A1S55B A1S58B which does not have a power supply module sufficient power may not be supplied When installing an RD3N 4N in an extension base which is not equipped with a power supply module select a power supply module a base unit an extension base unit and an extension cable by taking the following into consideration 1 Current capacity of th
6. Conversion enabled Conversion enabled No disconnection 2 For A68RD4N and A1S62RD4N 4 wire type Disconnection at each channel is detected and the X disconnection de tected flag X3 is set However if all channels are specified for conversion disabled discon nections are not detected If at least one channel is specified for conversion enabled disconnec tions are detected Example For AiS62RD4N HEN Disconnection Detected Flag X3 CH 2 Connection Disconnected example xX disconnection Disconnection No disconnection Disconnection CH 1 and CH 2 CH 1 and CH 2 3 SPECIFICATIONS MELSEC A 1 Be sure to set the channel which is not connected to or used by the Pt100 to conversion disabled If it is set to conversion enabled the disconnected detected flag is set 2 Section 3 4 4 gives details about disconnection detected flags 3 Section 4 5 gives details about Pt100 connections 3 3 6 Specifying platinum resistance thermometers The following platinum resistance thermometers can be used for the RD3N 4N o mo peus IR Specifying the type of platinum resistance thermometers by using buffer memory address 36 sets all channels to a specified type The type is set to Pt100 when power is turned ON or the CPU is reset Two different types of platinum resistance thermometers cannot be used simultaneously in one module If two types are used the corre
7. When some of the channels are set to conversion enabled and any of the channels are disconnected the Zdisconnection detected flag X3 is set When all of the channels are set to conversion disabled the disconnec tion detected flag X3 is always reset Some channels are set to conversion enabled 55 Conversion abled disabled All channels are set to conversion disabled Some channels are disconnected All channels are connected Edisconnection de tected flag X3 OFF Section 3 3 5 gives details of disconnection detection 3 SPECIFICATIONS 3 5 Buffer Memory 3 5 1 Buffer memory allocation The following describes the buffer memory allocation not battery backed of an RD3N 4N 1 For A68RD3N 4N Address decimal Conversion specification Averaging time count Read write area using a PLC CPU CH1 Detected temperature value L 32 bits CH2 Detected temperature value L 32 bits H CH3 Detected temperature value L Read only area using a PLC CPU 32 bits H Detected temperature value L 32 bits H CH5 Detected temperature value L 32 bits H CH6 Detected temperature value L 32 bits H CH7 Detected temperature value L 32 bits H Detected temperature value L 32 bits H Write data error code Conve
8. Type A1S62RD3N Temperature Sensor Input Module hereafter abbreviated to the A1S62RD3N A1S62RD4N Temperature Sensor Input Module hereafter abbreviated to the A1S62RD4N which are used with the MELSEC A series PLC CPU module hereafter abbreviated to the PLC CPU A68RD3N AG8RDAN A1S62RD3N A1S62RD4N are generically abbreviated to the RD3N 4N Summary of specification Module name Large size building block type A68RD4N 4 wire type Small size building block type The RD3N 4N converts temperature data from a platinum resistance ther mometer JPt100 or Pt100 hereafter called the Pt100 to either 16 or 32 bits of signed binary data The sixteen 16 bits of signed binary data are expressed to the first decimal place The thirty two 32 bits of signed binary data are expressed to the third decimal place Temperature Measuring Process RD3N AN PLC CPU sg 1 1100 5 a CH 1 e 2 3 5 Exchange of data Detected temperature value CH 2 Buffer memory 2 1 A change in the ambient temperature of the Pt100 changes the resistance value 2 Temperature data is stored as a detected temperature value and is stored in the buffer memory of the RD3N 4N 3 A detected temperature value stored in the buffer memory of the VL RD3N 4N is read from PLC CPU 1 INTRODUCTION 11 Features 1 This module read temp
9. X000 X081 X001 X080 X081 2 X080 X081 LI M X003 X080 oo X082 X080 X081 4 X004 080 X081 Roe was move eor Move as sco vos Roos MELSEC A Designate JPt100 Designation of channel 1 for conversion enable is stored in D1 Designation of channel 1 for time averaging is stored in D2 Averaging time 500 msec is stored in D2 Data in DO to D1 is written to buffer memory ad dresses 0102 conversion completed flag is read detected temperature value of channel 1 is read to D10 after conversion is completed When data in D10 is nega tive Y70 is turned ON When data in D10 is nega live the data is stored in D20 as a positive value When data in D10 is posi tive the data is stored in D20 The detected temperature value in D20 of channel 1 is output to Y40 to 4F in BCD code The write data error flag X82 is set due to a write data error and an error code is stored to D30 An error code is output to Y50 to Y57 in BCD code An error code is reset 6 TROUBLESHOOTING _ 6 TROUBLESHOOTING _ This section gives lists of error codes causes and
10. Addresses 10 Through 33 for A1S62RD3N 4N Addresses 10 and 11 18 Through 21 Two types of detected temperature storing areas are provided depending on the bit size of the data 16 bit data storing area and 32 bit data storing area 1 For 16 bit data For AG8RD3N 4N Addresses 10 Through 17 for A1S62RDSN AN Addresses 10 and 11 Ten 10 times the value of a detected temperature is stored in the range from 1800 to 6000 as a 16 bit signed binary value If a detected temperature value is negative this is stored as a comple ment of 2 Example 1 detected temperature value is 123 025 C 1230 is stored 615 514 b13 b12 611 610 b9 b8 67 b6 65 63 b2 bi 00 Example 2 detected temperature value is 123 025 1230 is stored 615 614 613 612 bii 610 69 68 67 56 05 b4 b3 b2 bi 50 2 For 32 bit data For AG8RD3N 4N Addresses 18 Through 33 for A1S62RDSN A4N Addresses 18 and 21 One thousand 1000 times the value of a detected temperature value is stored in the range from 180000 to 600000 as a 32 bit signed binary value If a detected temperature value is negative this is stored as a complement of 2 b31 to b24 623 to b16 615 to b8b7 Example 2 If a detected temperature value is 123 025 123025 is stored b31 to b24 b23 to 516 615 to b8b7 to 3 SPECIFICATIONS 3 5 6 Buffer for write data error code Address 34 This area is used to check whether data written to an 4 from a
11. D mm inch mm inch Refer to Section 3 2 1 0 39A Outline dimensions 3 SPECIFICATIONS 3 2 1 Specifications when connecting with a platinum resistance thermometer The following specifications apply when an RD3N 4N is connected with platinum resistance thermometer 1 For A68RD3N AiS62RD3N Make sure that the conductor resistance value between the Pt100 and A68RD3N A1S62RD3N is 10 Q or less per wire channels have the same specifications 1 10 or less A68RD3N A1S62RD3N Wire in the following conditions 1 Conductor resistance value lt 10 Q 2 Conductor resistance value lt 10 Q 3 Conductor resistance value lt 10 2 For A68RD4N A1S62RD4N Set the total resistance value of the conductor where the current runs to 70 or less i i A1S62RD4N 1 Pt100 Wire in the following conditions 1 2 3 4 5 lt 70 Q CH 2 Pt100 Indicates the direction of current i 5 H gt SLD H 3 SPECIFICATIONS 33 Functions This section explains the various functions of the RD3N 4N 3 3 1 Functions list The following table lists the functions of the RD3N AN Table 3 3 List of Functions ___ ___ Bewnln Section Referance Conversion enable disable setting of each channel Temperature detection enable disable is set The detected temperature is proce
12. applications In addition applications in which human life or property that could be greatly affected such as in aircraft medical applications incineration and fuel devices manned transportation equipment for recreation and amusement and safety devices shall also be excluded from the programmable controller range of applications However in certain cases some applications may be possible providing the user consults their local Mitsubishi representative outlining the special requirements of the project and providing that all parties concerned agree to the special circumstances solely at the users discretion A68RD3N 4N A1S62RD3N 4N Input Module User s Manual MODEL A68 A1S62RD U SY E MODEL CODE 13JR46 SH NA 080193 D 0707 MEE HEAD OFFICE TOKYO BUILDING 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN NA 1 14 YADA MINAMI 5 CHOME HIGASHI KU NAGOYA JAPAN GOYA WORKS 1 14 When exported from Japan this manual does not require application to the Ministry of Economy Trade and Industry for service transaction permission Specifications subject to change without notice
13. carries AC power so that the signals will not be influenced by AC surge and induction 2 Do not run the external wiring cables with or near the cables such as main circuit cable high voltage cable and cables carrying load from other than the programmable controller 3 The shield of the shielded wire or cable must be grounded at the programmable controller side one point grounding There are cases the shield should be grounding externally depending on external noise condition 4 5 2 Connection to AG8RD3N A1S62RD3N 1 The highest precision be achieved by connecting a 3 wire type Pt100 to the AG8RD3N A1S62RD3N An example of connecting a 3 wire Pt100 is shown below internal circuit 1 Ground the FG of the power supply module also 2 Depending on the operation environment this connection may give better results When the A1S62RD3N is used 1 the terminal name is AG 2 4 wire type or 2 wire type Pt100 can also be used with the AGBRDSN A1S62RD3N The following shows the diagrams for connecting a 2 wire or 4 wire Pt100 4 PRE OPERATION SETTINGS AND PROCEDURES MELSEC A 4 5 3 Connection to AG8RD4N A1S62RD4N 1 The highest precision can be achieved by cocnnecting a 4 wire type Pt100 to the AG8RD4N and A1S62RDA4N An example of connecting a 4 wire Pt100 is shown below Constant current circuit 1 Ground the FG of the power supply module also 2 De
14. conver sion enable the wire break detection flag turns ON if a wire break does not occur on the channel connected with PT100 5 PROGRAMMING 5 PROGRAMMING The following explains the programming to use with the RD3N 4N 5 1 Programming Procedure Figure 5 1 shows the procedure for writing a program to execute data write read between a PLC CPU and an Are all channels set for conversion disabled2 Make a program to disable conversion Make a program to enable conversion for designated channels Is JPt100 used Make a program to desig nate JPt100 15 averaging required Make a program to set time No or count of averaging Sampling Initial setting Make a program to execute averaging Make a program to read tempera ture detection values Is a data error checked Make a program to read write data error codes Make a program to reset an error code Complete Fig 5 1 Programming Procedure 5 PROGRAMMING MELSEC A 1 Initial setting must be done as indicated in Figure 5 1 If averaging processing is designated before setting the time or count of averag ing a write data error may sometimes occur It is recommended that the initial setting be executed by a batch writeinstruction 2 Access from the PLC CPU takes priority among various types of processing of the special function module If access from the PLC CPU to the buffer memory of the special function module is
15. memory the conversion completed flag of its corre sponding channel is set to 1 e Conversion enabled disabled specification change from 1 to 0 The conversion completed flag of its corresponding channel is set to O 2 A conversion completed flag is provided to each channel 515 514 613 612 bit 610 09 b8 67 66 65 64 b3 b2 b For AGBRD3N AN 58 through b15 are fixed at 0 Conversion completed flag For A1S62RD3N 4N b2 through b15 are fixed at 0 1 Conversion completed 2 Conversion not completed 3 The conversion completed flag can be used for the interlock when reading the detected temperature value of the channel where averaging processing is executed 3 5 8 Buffer for the type of specifications for a platinum resistance thermometer Address 36 1 When the power supply is turned ON the type is set to Pt100 2 All channels correspond to a specified type 515 514 613 612 511 510 69 68 67 06 65 64 b3 b2 Ignored Type specifications a platinum resistance thermometer 1 JPt100 0 Pt100 Section 3 3 6 gives platinum resistance thermometer details 4 PRE OPERATION SETTINGS AND PROCEDURES 4 4 PRE OPERATION SETTINGS AND PROCEDURES Pre Operation Procedures The pre operation settings and procedures of the RD3N 4N are given below Attach the RD3N 4N to a base unit Connect the Pt100 to the channel See Section 4 5 used by the RD3N AN Turn ON the power to the PLC CPU and RD3N AN
16. resistance thermometer input channel Non insulated aoe withstand volt Across platinum resistance thermometer input PLC power supply 500 V AC for 1 minute Batch Batch Batch Batch Detected Detected Detected Detected Wire break detection channel detected channel detected channel dete eted channel detected by channels by channel channels by channel channels by channel channels Number of occupied I O points Connection terminals 38 point terminal block Internal current tion 5 V DC 0 94 A 0 41A 0 49 A 0 39 0 94 0 75 A 0 54 A 0 44 A 32 20 point term nal block 38 point terminal block 20 point terminal block _0 62 0 60kg 0 29kg 0 28 250 H x 37 5 W x 130 H x 34 5 W x 107 4 D mm Weight O 43kg 043 9 0 27kg 0 27 kg 250 H x 37 5 W x 130 x 34 5 W x Outline dimensions 107 4 D mm 131 D mm 131 D mm APP 1 APPENDICES APPENDIX2 PRECAUTIONS WHEN REPLACING THE CONVENTIONAL MODELS Any of the conventional models A68RD3 A68RD4 A1S62RD3 and A1S62RD4 can be replaced easily with the RD3N 4N by just swapping the modules No modifications related to system control are required i e no program modifications are required However since this module handles analog data a measurement error within total accuracy 1 will occur after mo
17. 2006 SH 080193 SAFETY PREGAUTIONS Jul 2007 SH 080193 D Partial Correction Section 4 3 Japanese Manual Version SH 080190 D This manual confers no industrial property rights or any rights of any other kind nor does it confer any patent licenses Mitsubishi Electric Corporation cannot be held responsible for any problems involving indutrial property rights which may occur as a result of using the contents noted in this manual 2002 MITSUBISHI ELECTRIC CORPORATION INTRODUCTION Thank you for choosing the Mitsubishi MELSEC A Series of General Purpose Programmable Controllers Please read this manual carefully so that the equipment is used to its optimum A copy of this manual should be forwarded to the end User Contents 1 1 1 1 2 11 Features 1 2 2 SYSTEM CONFIGURATIONS 2 1 2 2 3 SPECIFICATIONS 3 1 3 23 3 1 General Specifications 3 1 3 2 Performance 3 2 3 2 1 Specifications when connecting with a platinum resistance thermometer 3 3 3 3 3 4 3 3 1 Fu
18. 3 2 1989 JIS 1100 APP 3 3 3 Old JIS 1100 APP APPENDIX 4 OUTSIDE 5 4 41 6 2 4 42 2 1 APP 5 4 3 1562 1 APP 6 4 4 1562 4 1 7 Conformation to EMC Directive and Low Voitage Instruction For details on making Mitsubishi PLC conform to the EMC directive and low voltage instruction when installing it in your product please see Chapter 3 EMC Directive and Low Voltage Instruction of the User s Manual Hardware of the PLC CPU to use The CE logo is printed on the rating plate on the main body of the PLC that conforms to the EMC directive and low voltage instruction By making this product conform to the EMC directive and low voltage instruction it is not necessary to make those steps individually 1 INTRODUCTION 1 INTRODUCTION This manual explains the specifications and part names of Type A68RD3N Temperature Sensor Input Module hereafter abbreviated to the AG8RD3N Type AG8RD4N Temperature Sensor Input Module hereafter abbreviated to the AG8RD4N
19. 5 GAIN Buffer memory Adjust data to an offset valu UP DOWN switch 797 800 Set the offset gain setting switch to SET OFFSET p gain value is GAIN stored Buffer memory 1 EE I J e 15 the calibration finished OFFSET B An offset value is GAIN stored Open the TEST terminal Complete 4 PRE OPERATION SETTINGS AND PROCEDURES MELSEC A 1 If the offset gain setting switch is returned back to the OFFSET position after setting the offset gain in the test mode the set offset value cannot be checked The set value is retained 2 After operating the module in the normal mode with the offset gain set in the test mode the set offset and gain values cannot be checked even if the mode is changed back to the test mode The set values are retained 4 PRE OPERATION SETTINGS AND PROCEDURES MELSEC A 4 5 Connecting a Platinum Resistance Thermometer The method for connecting a Pt100 to a 3 wire AGBRDSN A1S62RD3N 4 wire 4 A1S62RD4N model is explained below 4 5 1 Cautions on connection To design the reliable system allowing the RD3N 4N to operate at its full performance it is necessary to design the external wiring so that it is not influenced by noise The cautions that require your careful attention are indicated below 1 Use separate cable for external input signals of RD3N 4N from the cable that
20. 6 6 7 If the Disconnection Detected Flag is Set Is a channel that is not connected to a Designate a channel that is not connected Pt100 designated for conversion enabled to a Pt100 for conversion disabled 16 there any disconnection A68RD3N A1S62RD3N Securely connect or replace the Pt100 of the corresponding channel A68RD4N e Make the connection between terminals a1 and b8 Securely connect or replace the Pt100 A1S62RD4N Make the connection between terminals a1 and b2 Securely connect or replace the Pt100 CPU Cannot Read Detected Temperature Values Corrective Action 15 the channel designated for conversion Designate the channel for conversion enabled enabled 15 the RUN LED flashing or turned OFF Follow the procedure given in Section 6 2 15 the RUN LED on the CPU flashing or Check the error content in the user s turned OFF manual of the PLC CPU in use Is the ERROR LED on the CPU flashing or turned OFF Is a Pt100 securely connected or is there Securely connect or replace the Pt100 a disconnection within the Pt100 Has the error been fixed correctly Follow the procedure given in Section 4 4 6 8 Temperature Input Values do not Correspond to the Temperature Detection Val Does the designated type of Pt100 corre Make sure the designated type spond to the actual Pt100 used corresponds to the actual Pt100 being used Is
21. CPU has been written to the WRITE area within the setting range 1 When data is read from the PLC CPU the RD3N 4N checks the follow ing e Data range check for the averaging count and averaging time e Data check for writing to the read only area If any value is outside the specified range or if data is written to the read only area the RD3N 4N stores the error code as a 16 bit binary value Section 6 1 gives error code details 2 If there is more than one error code the first data error code detected by the RD3N 4N will be stored The others are not stored 3 To reset an error code write 0 from the PLC CPU If an error is reset without correcting the error the data error code is set to and the RUN LED of RD3N 4N stops flashing 1 When a value other than 0 is written the error code is not reset 2 Error code reset can be done by setting the error reset flag Y12 See Section 3 4 3 3 SPECIFICATIONS 3 5 7 Buffer for conversion completed flag Address 35 This area is used to check whether the channel specified for conversion en abled can detect the temperature correctly 1 After power ON the processing of the conversion completed flag is performed only once when the channel specification for conversion enabled disabled address O is changed Conversion enabled disabled specification change from 0 to 1 After setting conversion enabled and storing a detected temperature value in buffer
22. D3N AN Addresses 10 11 18 Through 21 3 21 3 5 6 Buffer for write data error code Address 34 3 22 3 5 7 Buffer for conversion completed flag Address 35 3 23 3 5 8 Buffer for the type of specifications for a platinum resistance thermometer Address 36 3 23 4 PRE OPERATION SETTINGS AND PROCEDURES 4 1 4 12 41 Pre Operation Procedures 4 1 42 Handling 4 2 4 3 Nomenclature 2 4 3 4 4 Error Compensation 4 5 4 41 Initial setting 4 7 4 4 8 Error compensation 4 8 4 5 Connecting a Platinum Resistance Thermometer 4 10 4 5 1 Cautions on connection 4 10 4 5 2 Connection to A1862RD3N 4 10 4 5 3 Connection to AGBRDAN A1862RD4N 4 11 5 PROGRAMMING 5 1 5 5 51 Programming 5 1 5 2 Programming
23. MITSUBISHI Type A68RD3N 4N A1S62RD3N 4N Pt100 Input Module User s Manual Mitsubishi Programmable Controller SAFETY PRECAUTIONS Read these precautions before using When using Mitsubishi equipment thoroughly read this manual Also pay careful attention to safety and handle the module properly These precautions apply only to Mitsubishi equipment Refer to the user s manual of the CPU module to use for a descriprion of the PLC system safty precautions These SAFETY PRECAUTIONSO classifiy the safty precautions into two categories DANGER and CAUTION D DANGER Procedures which may lead to a dangerous condition and cause death or serious injury if not carried out properly Procedures which may lead to a dangerous condition and cause superficial to CAUTION Co medium injury physical damage only if not carried properly Depending on circumestances procedures indicated by CAUTION may also be linked to serious results In many case it is important to follow the directions for usage Store this manual in a safe place so that you can take it out and read it whenever necessary Always forward it to the end user DESIGN PRECAUTIONS Do not bunch the control wires or communication cables with the main circuit or power wires or install them close to e
24. SPECIFICATIONS 3 3 4 Storage of a detected temperature value Temperature can be detected with the RD3N 4N within the range of 180 C to 600 C Detected temperature values to the first and third decimal places are stored in the buffer memory 1 Values to the first decimal place Values to the first decimal place are multiplied by 10 and expressed as 16 bit signed binary values The data within the range of 1800 to 6000 is stored 2 Values to the third decimal place Values to the third decimal place are multiplied by 1000 and expressed as 32 bit signed binary values The data within the range of 180000 to 600000 is stored Example 216 025 C 1000 times 216 025 216025 i Stored the buffer memory 1 3 SPECIFICATIONS 3 3 5 Disconnection detection Disconnection of a Pt100 or cable is detected 1 For A68RD3N and 1562 0 3 wire type Disconnection at each channel is detected and the disconnection de tected to XA for AG8RD3N and or X4 for A1S862RD3N that corresponds to that channel is set However this applies only in channels specified for conversion enabled Connections between CH1 and a Pt100 Conversion Disconnection Connection Example Enabled Disabled Detected X3 Specification Conversion enabled Disconnected Conversion disabled A68RD3N A1S62RD3N Disconnection Conversion enabled No connection Conversion disabled
25. ach other They should be installed 100mm 3 9inch or more from each other Not doing so could result in noise that would cause erroneous operation INSTALLATION PRECAUTIONS e Use each module in an environment as specified in the general specification in the detailed manual Using the PLC outside the range of the general specifications may result in electric shock fire or malfunction or may damage or degrade the module Before mounting the module insert the module fixing hook at the bottom of the module into the fixing hole in the base unit The AnS series modules must be screwed to the base unit to the specified torque Improper mounting of the module can cause a malfunction failure or drop Do not touch the conductive area or electronic parts of the module directly Doing so can cause the module to malfunction or fail WIRING PRECAUTIONS Always ground the FG terminal and SLD terminal to the protective ground conductor Not doing so can cause a malfunction Carry out wiring to the PLC correctly checking the rated voltage and terminal arrangement of the product Using a power supply that does not conform to the rated voltage or carrying out wiring incorrectly will cause fire or failure Tighten the terminal screws to the stipulated torque Loose screws will cause short circuits or malfunctions Overtightening can damage the screws and module causing the module to fall short or malfunction Ma
26. al specifications performance specifica tions and I O conversion characteristics of the RD3N 4N 31 General Specifications Table 3 1 shows the general specifications of the RD3N AN Table 3 1 General Specifications When there is intermittent vibration 0 075 mm 57 to 150 When there is continuous vibration Frequency Amplitude 0 035mm 57 to 150Hz 4 9m s Shock durability Conforming to JIS B 3502 IEC61131 2 147m s 3 times each in 3 directions Conforming to Vibration durability JIS B 3502 IEC 61131 2 10 times in each direction X Y Z 80 minutes 1 Indicates the location where the device is connected from the public cable network to the device structure wiring area Category II applies to the devices to which the power is supplied from a fixed equipment Surge withstand voltage for devices with up to 300V of rated voltage is 2500V 2 This is an index which indicates the degree of conductive object generation in the environment Pollution level 2 is when only non conductive pollution occurs A temporary conductivity caused by condensation must be expected occasionally 3 Do not use or store the PLC under pressure higher than the atmospheric pressure of altitude Om Doing so can cause a malfunction When using the PLC under pressure please contact your sales representative 3 SPECIFICATIONS 5 3 2 Performance Specifications The follo
27. buffer memory address 1 where averaging processing is designated 1 Sampling Data in a channel is converted according to the sampling time set in the PLC CPU The detected temperature values are stored in the buffer memory Sampling time Buffer memory Temperature errs C Detected temperature value Time ms How the contents of the buffer memory change according to the sampling time 1 The sampling time varies according to the number of channels Sampling time number of channels to be used x 40 ms ms Example When channel 1 is used 1 x 40 40 ms 2 Section 3 5 gives details about the buffer memory 3 SPECIFICATION 5 2 Time averaging processing time Data conversion in the channel is done in the time that is set in the PLC CPU for averaging processing A detected temperature value is read per sampling time in the range of setting time 320 to 32000 ms for AGBRDSN AN and 80 to 32000 ms for A1S62RD3N 4N and the average of the remaining values except for maximum and minimum values is stored in buffer memory Average Previous average Data Time Maximum Minimum value value 180 210 215 205 200 195 180 Average 198 7 Stored in buffer memory The previous average is stored in buffer memory until the average of the new detected temperature value is
28. corrective actions for the errors which may occur when an 4 is in operation 61 Error Code List Any of the following error codes are stored in the buffer address 34 of an RD3N 4N if an error occurs the RUN LED flashes when data is written from a PLC CPU to the RD3N 4N 110 4 Table 6 1 Error Code List Data write was attempted to the read only areas Addresses of read only areas A68RD3N 4N Buffer memory addresses 10 to 33 35 A1S62RD3N 4N Buffer memory addresses 10 11 18 to 21 35 Correct the program so that it does not execute data write to read only areas An out of range value was set as the Correct the averaging averaging time value time setting so that it Setting ranges of averaging time values will be within the A68RD8N 4N 320 to 32000 ms range A1S62RDSN AN 80 to 32000 ms indicates the number of the channel where an error occurred Numbers 0 to 4 do not have any particular meaning They indicate the averaging time setting errors The set values of the averaging count are no Correct the averaging within the 1 to 800 times range count setting so that indicates the number of the channel where the values set are an error occurred within the 1 to 800 Numbers 5 to 8 do not have any particular times range meaning They indicate averaging count setting errors 1 If more than one error has occurred only the first error c
29. ct temperature detection cannot be achieved in the channel which has a different platinum resistance thermometer than the one specified 1 Appendix 3 gives details about the standard resistance values of the platinum reisistance thermometers 2 Section 3 5 gives details about the buffer memory 3 SPECIFICATIONS 34 CPU I O Signal This section explains the functions of signals that control the RD3N 4N and the PLC CPU X devices refer to input signals from the RDSN AN to the CPU Y devices refer to output signals from the CPU to the RD3N AN The device signals X and Y shown in this section are used when the RDS3N AN is loaded into slot of the main base unit 1 For A68RD3N Signal Direction AGBRD3N PLC CPU Signal Direction PLC CPU A68RD3N disconnection detected CH 4 disconnection detected Interlock for RFRP RTOP instructions when setting an to a remote station lt lt CH 5 disconnection detected CH 6 disconnection detected CH 7 disconnection detected flag Y10 to Unusable CH 8 disconnection detected flag Y11 XB 0 Unusable Error code reset 1 xi x2 X3 X4 X5 X6 X7 X8 X9 XA X1D Interlock flag for RFRP and RTOP Y13 to instructions when setting an AG8RDSN to a to Unusable remote I O station YF 2 For A68RD4N Signal Direct
30. cted temperature values so that the detection value corresponds to the input temperature or 80 C A The detected temperature value must compensated to 79 7 lt 7 match the input temperature Before error compensation After error compensation gt gt 80 C 50 C Input temperature 49 7 Pi 1 n 50 C OFFSET Error compensation can be done using a standard resistor instead of inputting a direct temperature to the Pt100 Standard resistance value of Pt100 for an input tempera ture that is an offset gain value see Appendix 3 Resistance value of a standard resistor 4 PRE OPERATION SETTINGS AND PROCEDURES MELSEC A 1 Complete the error compensation at the highest and lowest tem peratures of the available range Doing so yields a high precision offset gain value 2 To set an offset gain value read the detected temperature value with a sequence program However provide interlock to read a detected temperature value when the READY flag X1 is set 3 The offset gain value must be within the input temperature range 4 The offset gain value is stored in the RD3N 4N Even if the power supply is turned OFF this data is not cleared from memory 5 If error compensation is executed in test mode error is occurred within the overall accuracy 1 96 after the mode is changed to the no
31. dule replacement Therefore verify measurement results after module replacement and com pensate the error if necessary The conventional models do not support the platinum resistance thermometer for 1 mA output current for detecting temperature If a platinum resistance thermometer for 1 mA is used the self heating of the platinum resistance thermometer caused by overcurrent may generate a significant error in measurement results Furthermore if the optimization compensation of the entire system has been carried out under the condition that includes an error measurement results will be normal after module replace ment thus generating a difference in measured values by the amount of compensation Therefore if the module is to be replaced it is necessary to optimize the entire system again as necessary APPENDIX3 STANDARD RESISTANCE VALUE OF PLATINUM RESISTANCE THERMOMETERS 31 1997418 Type Pt100 JIS 1604 1997 IEC 751 am2 Unit Q w 313 71 sos so so 19810 22072 0 veros 197 71 20075 GEL APP 2 APPENDICES MELSEC A 3 2 1989JIS Type Pt100 JIS C 1604 1989 DIN 43760 1980 Unit Q 9 9 313 59 43 87 4 190 45 260 72 3971 80 31 50 264 11 297 39 80 Ex A N
32. dy after turning ON or resetting the CPU in the normal mode This flag is reset in the test mode Refer to Section 4 4 2 when the OFF SET GAIN switch is set to SET ON Power supply OFF Test mode Mode Normal mode OFFSET OFFSET GAIN SET switch GAIN READY flag F 2 seconds 2 seconds 3 4 3 Write data error flag X2 and error code reset Y12 This flag is set when an error other than the watchdog timer error occurs in the RD3N 4N and the error code is stored in the buffer memory error code storage area address 34 If 0 is written to the setting value check code storage area or the error reset flag is set with a sequence program the error code is reset Error code ON reset flag OFF Write data error code stor 0 X Error code 0 Write data ON OFF error flag 3 SPECIFICATIONS 3 4 4 Disconnection detected flag 1 2 For A68RD3N A1S62RD8N 3 wire type When a channel set to conversion enabled is disconnected the discon nection detected flag to XA for A68RD3N and or X4 for A1S62RD3N of its channel is set If a channel is set to conversion disabled the disconnection detected flag is always reset Channel 1 Conversion enabled Conversion enabled 55 disabled specification of channel 1 Conversion disabled Disconnected 55 Channel 1 Not disconnected Disconnection detected flag X3 OFF For A68RD4N A1S62RD4N 4 wire type
33. e external temperature is received and disconnection detection is done Conversion disable The external temperature is not received and disconnection detection is not done All channels are set to the default conversion disable Set the channel to the buffer memory address 0 for conversion en able disable setting to convert to the conversion enable See section 3 5 2 Conversion enable conversion enable Detected temperature 10 265 CH 1 values 16 bits 11 0 CH 2 Detected temperature values 82 bits time Sampling time 2 x 40 ms 80 ms 2 When channel 1 is set to conversion enable Sampling time 1 x 40 ms 40 ms 3 SPECIFICATIONS 4 When the conversion enable is switched to conversion disable the following processing is executed a Buffer memory address 35 to store the conversion completed flag of channels 1 and 2 is reset b Disconnection detected flag is reset The detected temperature value stored in the buffer memory holds data before writing a conversion enable disable setting 1 Section 3 5 gives details about the buffer memory 2 Section 3 3 5 gives details about the disconnection detection and Section 3 4 gives details about the disconnection detected flag 3 SPECIFICATIONS 3 3 3 Sampling and time averaging processing Designation of sampling processing or time averaging processing is made by
34. e power supply module in the base unit 2 Voltage drop at the base unit 3 Voltage drop at the extension unit 4 Voltage drop at the extension cable When the A3CPU P21 R21 is used the AG8RD3N 4N cannot be installed in the last seventh slot of the extension unit This restric tion does not apply to the A73CPU ASACPU b 4 Data Link System In the data link system the module can be installed at any of the mas ter station local station and remote I O station For an example of program at the remote I O station refer to MELSECNET MELSEC NET B data link system Reference manual For the calculation of the range of I O points and voltage drop refer to the following manuals A1TSJCPU S3 User s manual 66446 A1S A1SC24 R2 A2SCPU S1 User s 22 66320 A2ASCPU S1 S30 User s 66536 e A52GCPU T21B Reference 66420 A2USHCPU S1 User s 66789 A1SJH S8 A1SH A2SHCPU S1 User s 66779 Q2AS H CPU S1 User s 5 3599 3 SPECIFICATIONS 3 SPECIFICATIONS This chapter describes the gener
35. erature data C by directly connecting a platinum resistance thermometer to RD3N AN Any platinum resistance thermometer that conforms to the following standards can be used es 2 The value to the first or third decimal place of the input temperature data can be stored Example 150 1 Value to the first decimal Temperature data 150 125 C lt place is stored 150 125 C Value to the third decima i place is stored 3 Multi channel temperatures can be measured with one module AG8RDSN 4N 8 channels A1S62RD3N 4N 2 channels 4 Three conversion processing methods sample processing time averag ing processing and number of times of averaging processing can be selected b Pt100 or cable disconnections can be detected A68RDSN A1S62RD3N Detection by each channel AG8RDAN A1S62RD4N Joint detection by all channels 6 Each channel can set the conversion enable disable 2 SYSTEM CONFIGURATIONS 2 SYSTEM CONFIGURATIONS 1 Applicable CPU oor For AGBRDGN AN For A1862RD3N AN 2 A2UCPU S1 e 8 51 ATSJCPU S3 A2SCPU A2ZASCPU S1 S30 A52GCPU ASUCPU AOJ2HCPU A2CPU S1 e A73CPU S3 2 1 A52GCPU ATSHCPU ATSJHCPU SB A2SHCPU S1
36. error compensation done correctly Follow the procedure given in Section 4 4 Is the disconnection detection flag set Follow the procedure given in Section 6 6 Is the CPU in the RUN state Set the CPU to the RUN state APPENDICES APPENDICES APPENDIX 1 COMPARISON OF PERFORMANCE SPECIFICATIONS BETWEEN CONVENTIONAL MODELS AND RD3N 4N Table 1 Comparison of Performance Specifications RD3N 4N Conventional models A68RD3N A68RD4N A1S62RD3N A1S62RD4N A68RD3 A68RD4 A1S62RD3 A1S62RD4 i 3 wire 4 wire 4 wire 3 wire 4 wire 3 wire 4 wire Measuring method type type type type type type 16 bit signed binary data Output 1800 to 6000 Value to first decimal place x 10 times temperature value 32 bit signed binary data 180000 to 600000 Value to third decimal places x 1000 times tance thermometers 1989 DIN 43760 1980 JPt100 JIS C 1604 1981 JPt100 JIS C1604 1981 Temperature 100 180 Cto 600 C 27 10 0 10 313 71 0 180 to 600 C 27 08 to 313 59 input ranges 180 C to 600 C 25 80 to 317 28 1 accuracy relative to full scale 0 025 C Resolution Conversion speed 40 ms 1 channel aut points temperature in 8 channels 1 module 2 channels 1 module 8 channels 1 module 2 channels 1 module Temperature detecting out Insulation method Across platinum resistance thermometer input PLC power supply Photocoupler insulated Across platinum
37. gained frequently not only the scanning time of the PLC CPU will be prolonged but also the various types of processing of the special function module will be delayed Carry out the access from the PLC CPU 3 For the type designation of the platinum resistance thermometer see Section 3 3 6 5 PROGRAMMING 5 2 Programming Example The following gives an example of programming to use an RD3N AN Except that the number of channels that can be used is different between the A68RDSN A4N and the A1S62RD3N 4N the contents of the programs are the same The following explains an example for the A1S62RD4N If the sample program explained in this chapter is used in the actual system be sure to verify that there is no controllability problem in the target system in advance 5 2 1 Program to read a detected temperature value This program performs time averaging processing of 500 ms on channel 1 that uses a JPt100 and reads the detected temperature value after conver sion is complete A program for reading write data error codes and doing error code reset is included System configuration pu X Y80 b e number X3F X Y9F Specifications 1 Commands that can be executed a Write command of specified type of platinum resistance XO thermometer b Write command of the specified conversion enabled X1 channel and the time averaging processing specification c Read command of a conversion completed flag a
38. ion AGBRD4N PLC CPU Signal Direction PLC CPU A68RD4N error flag READY flag Unusable Interlock flag for RFRP and RTOP instructions when setting an AG8RDAN to a remote station Unusable Interlock flag for RFRP and RTOP instructions when setting an AG8RDAN to a remote I O station 3 SPECIFICATIONS MELSEC A 3 For A1862RD3N Signal Direction A1S62RD3N PLC CPU Signal Direction PLC CPU A1S62RD3N error READY flag X1 YO 2 Write data error flag to Unusable CH 1 Disconnection detected flag 11 2 Disconnection 5 to CH 2 Disconnection detected flag 1 Error code reset flag Unusable Y13 X1F to Unusable 1 4 For A1S62RD4N Signal Direction A1S62RD4N PLC CPU Signal Direction PLC CPU 1562804 Device No Description 1 READY flag YO to Y11 Unusable 2 Write data error gt disconnection detected CH 1 and CH 2 Error code reset flag to Unusable Y13 1 to Unusable 3 SPECIFICATIONS 3 4 1 WDT watch dog timer error This flag is set when the self diagnosis function of the RD3N 4N detects a error While the error flag is set the conversion of the RD3N 4N does not RUN If the error flag is set hardware malfunctions may occur 3 4 2 READY flag X1 This flag is set when the conversion is rea
39. is warranty term the product shall be repaired at no cost via the sales representative or Mitsubishi Service Company However if repairs are required onsite at domestic or overseas location expenses to send an engineer will be solely at the customer s discretion Mitsubishi shall not be held responsible for any re commissioning maintenance or testing on site that involves replacement of the failed module Gratis Warranty Term The gratis warranty term of the product shall be for one year after the date of purchase delivery to a designated place Note that after manufacture and shipment from Mitsubishi the maximum distribution period shall be six 6 months and the longest gratis warranty term after manufacturing shall be eighteen 18 months The gratis warranty term of repair parts shall not exceed the gratis warranty term before repairs Gratis Warranty Range 1 The range shall be limited to normal use within the usage state usage methods and usage environment etc which follow the conditions and precautions etc given in the instruction manual user s manual and caution labels on the product 2 Even within the gratis warranty term repairs shall be charged for in the following cases 1 Failure occurring from inappropriate storage or handling carelessness or negligence by the user Failure caused by the user s hardware or software design 2 Failure caused by unapproved modifications etc to the product by the user 3 Whe
40. ke sure that no foreign matter such as chips or wiring offcuts gets inside the module It will cause fire failure or malfunction STARTING AND MAINTENANCE PRECAUTIONS CAUTION Do not touch the terminals before switching power off externally in all phases Doing so can cause a malfunction Start cleaning or terminal screw retightening after switching power off externally in all phases Not doing so can cause a malfunction Do not disassemble or modify any module This will cause failure malfuntion injuries or fire Mount or dismount the module after switching power off externally in all phases Not doing so can cause the module to fail or malfunction Do not install remove the terminal block more than 50 times after the first use of the product IEC 61131 2 compliant Before touching the module be sure to touch ground metal or similar material to discharge static electricity from human body etc Failure to do so can cause the module to fail or malfunction DISPOSAL PRECAUTIONS CAUTION When disposing of this product treat it as industrial waste REVISIONS manual number is given on the bottom left of the back cover Print Date Manual Number Revision Mar 2002 SH NA 080193 A First printing Dec 2003 SH NA 080193 Partial Correction SAFETY PRECAUTIONS Section 3 1 Conformation to the EMC Directive and Low Voltage Instruction Sep
41. n the Mitsubishi product is assembled into a user s device Failure that could have been avoided if functions or structures judged as necessary in the legal safety measures the user s device is subject to or as necessary by industry standards had been provided 4 Failure that could have been avoided if consumable parts battery backlight fuse etc designated in the instruction manual had been correctly serviced or replaced 5 Failure caused by external irresistible forces such as fires or abnormal voltages and Failure caused by force majeure such as earthquakes lightning wind and water damage 6 Failure caused by reasons unpredictable by scientific technology standards at time of shipment from Mitsubishi 7 Any other failure found to be the responsibility of Mitsubishi or that admitted not to be so by the user 2 Onerous repair term after discontinuation of production 1 Mitsubishi shall accept onerous product repairs for seven 7 years after production of the product is discontinued Discontinuation of production shall be notified with Mitsubishi Technical Bulletins etc 2 Product supply including repair parts is not available after production is discontinued 3 Overseas service Overseas repairs shall be accepted by Mitsubishi s local overseas FA Center Note that the repair conditions at each Center may differ 4 Exclusion of loss in opportunity and secondary loss from warranty liability Regardless of the gra
42. nctions 3 4 3 3 2 Conversion enable disable channel 3 5 3 3 3 Sampling and time averaging processing 3 7 3 8 4 Storage of a detected temperature value 3 10 3 8 5 Disconnection 3 11 3 3 6 Specifying platinum resistance thermometers 3 12 34 3 13 341 watchdog timer error 0 3 15 3 4 2 READY flag 1 3 15 3 4 3 Write data error flag X2 and error code reset flag Y12 3 15 3 4 4 Disconnection detected 3 16 3 5 3 17 3 5 1 Buffer memory allocation 3 17 3 5 2 Buffer for conversion enabled disabled specifications Address 0 3 19 3 5 3 Buffer for averaging processing specifications Address 1 3 20 3 5 4 Buffer for averaging time count For AG8RD3N 4N Addresses 2 Through 9 for A1862RDSN AN Addresses 2 3 3 20 3 5 5 Buffer for detected temperature value For A68RD3N 4N Addresses 10 Through 33 for A1S62R
43. nd de X2 tected temperature values d Positive and negative distinguishing command of a de X3 tected temperature value e Read command of a write data error code X82 Write data error flag f Error code reset command 4 2 Output when detected temperature value is negative Y70 3 Output of a detected temperature value 4 digits of BCD numbers Y40to Y4F 4 Output of a write data error code 2 digits of BCD numbers Y50to Y57 5 Storage register of a conversion enabled channel specification DO 6 Storage register of time averaging processing specification D1 5 PROGRAMMING 7 Storage register of averaging time 8 Storage register of a conversion completed flag 9 Storage register of a read detected temperature value 10 Storage register of a detected temperature value after posi tive negative verification 11 Storage register of a write data error code D2 D3 D10 D20 030 5 PROGRAMMING Sample program Programming procedure Type designation of plati num resistance thermo meter Write of conversion en abled channel specifica tion and time averaging specification Read of a conversion completed flag and a de tected temperature value after conversion The positive or negative state of a detected tem perature value is verified and output Read of a write data er ror code by using a write data error flag Error code reset Completion
44. ode will be stored 2 An error code can be reset by writing 0 to the buffer address 34 or by setting an error code reset flag Y12 See Section 3 5 6 6 TROUBLESHOOTING 6 2 6 3 If the RUN LED Flashes or is Turned OFF 1 Flashes Is the write error flag set Follow the procedure given in Section 6 5 Are the TEST terminals open Fix the error by opening the TEST terminals 2 Turned OFF Is the 5 VDC power supplied e Check the power supply Connect the module securely to the base unit 16 the error flag set Follow the procedure given in Section 6 3 Are the TEST terminals open Compensate error and open the TEST terminals If the WDT Error Flag is Set Has a WDT error occurred Reset the PLC CPU or turn the PLC power OFF and ON If the power is not restored a hardware fault is probable Consult your nearest Mitsubishi representative 64 If the READY Flag is not Set 6 5 Check Item Corrective Action Is the WDT error flag set Follow the procedure given in Section 6 3 Has an error occurred within the PLC Refer to the user s manual of the PLC CPU CPU in use and take an appropriate action If the Write Data Error Flag is Set Has a write data error occurred e Check the error code list in Section 6 1 and modify the sequence program Check the initial setting procedure given in Section 5 1 and modify the sequence program 6 TROUBLESHOOTING 6
45. only writing the buffer memory data is cleared 3 SPECIFICATIONS ____ MELSEC A 3 5 2 Buffer for conversion enabled disabled specifications Address 0 This area is used to set the temperature detection 1 When the power is turned ON the channel specification is set at 0000H 0 for conversion disabled for all channels 2 Conversion enabled disabled can be changed with the sequence pro gram to reduce the sampling time b15 514 b13 612 bii 610 69 68 57 66 b5 04 b2 bi For A68RD3N 4N 08 through b15 are ignored Channel specifications For AiS62RD3N 4N b2 through b15 are ignored 1 Conversion enabled 0 Conversion disabled Example To specify channel 1 for conversion By writing 0001H 1 to specify the channels for conversion enabled disabled the sampling time is obtained as 40 ms x 1 40 ms b15 b14 613 612 b11 b10 69 08 67 56 65 b4 b3 0001 1 CH2 CH1 m Section 3 3 2 gives conversion enabled disabled specifications 3 SPECIFICATIONS 3 5 3 Buffer for averaging processing specifications Address 1 This area is used to set the sample processing or averaging processing 1 When the power is turned ON and the READY of the RD3N 4N is set all of the channels are set for sample processing 2 Use the buffer memory address 1 for selection of sample processing or averaging processing and the specification of the processing method time averaging co
46. pending on the operation environment this connection may give better results When the A1S62RDAN is used the terminal name is AG 2 3 wire type or 2 wire type Pt100 can also be used with the AG8RD4N and A1S62RDA4AN Connect as shown below when connecting a 3 wire type or 2 wire type Pt100 m H m a 4 PRE OPERATION SETTINGS AND PROCEDURES 3 Precautions for connection to AGBRD4N and A1S62RD4N The following are the precautions for connection of Pt100 to the A68RD4N and A1S62RDAN a Perform wiring so that there is continuity between the following terminals When all channels are used AG8RD4N CH 1 CH 2 CH 3 CH 4 CH 5 CH 6 CH 7 CH 8 al 1 B1b1 a2A2 B2 b2 a3A3 b3 a4A4 B4 b4 abAb5 B5 55 6 6 B6 b6 a7 A7 B7b7 a8A8 8 b8 When all channels are used on A1S62RD4N CH 1 CH 2 B1 61 a2 A2 B2 b2 b Skip the terminals of the unused channels When only CH1 2 3 and 6 are used on A68RD4N CH 1 CH 2 CH 3 CH 4 CH 5 CH 6 CH 7 CH 8 al 1 B1b1 a2A2 B2 b2 a3A3 b3 a4A4 464 5 5 B5 b5 a6A6 b6 a7A7 B7 b7 a8AB 8 8 Always wire terminals a1 and b8 When only CH1 is used on A1S62RD4N CH 1 CH 2 al A1 B1 b1 a2 A2 B2 b2 Always wire terminals a1 and b2 Always specify conversion disable for the channels not connected with Pt100 When the channels not connected with Pt100 are specified as
47. rmal mode 4 PRE OPERATION SETTINGS AND PROCEDURES 4 4 1 Initial setting The initial setting procedure shown below must be used for error compensa tion Platinum resistance thermometer model specification Create a program to read the detected temperature value Complete Sample program When channels 1 and 2 are set to JPt100 old JIS Initial setting command for error compen x1 sation Specify JPt100 an old JIS model TOP 0000 Ki Hoooo kse Kt K1 Read command during error compensation 1 Read detected temperature value pFRO Hoooo 18 Do REDAY Before setting the test mode the initial setting for error compensa tion in the normal mode 4 PRE OPERATION SETTINGS PROCEDURES MELSEC A 4 4 2 Error compensation procedure The error compensation procedure is shown below Input a gain value Short circuit the TEST terminal A68RDS3N AN Terminal 1 2 A1S62RD3N AN Terminal 1 3 and set it to the test mode Pt100 or standard Set a calibrating channel using the resister etc channel selection switch Set the offset gain setting switch to Input an offset value GAIN The RUN LED flashes SET GAIN every 0 5 s Pt100 or standard resister etc Set the offset gain setting switch to OFFSET OFFSET The RUN LED flashes every 0 5
48. rsion completed flag Type specification of a platinum resistance thermometer When using a PLC CPU buffer memory addresses 10 to 33 and 35 are read only areas Therefore never write data to the areas with a PLC Read write area using a PLC CPU Read only area using a PLC CPU Read write area using a PLC CPU CPU because the AG8RD3N 4N always overwrites a detected tempera ture value Thus if writing is done to these areas buffer memory data will be destroyed 3 SPECIFICATIONS 2 For A1S62RD3N 4N Address decimal o 00 WAN Conversion enabled disabled specification Read write area using a PLC CPU Unused area unusable CH1 Detected temperature value 16 bits CH2 Detected temperature value 16 bits Read only area using a PLC CPU Unused area unusable CH1 Detected temperature value 32 bits CH2 Detected temperature value L 32 bits Read only area using a PLC CPU Unused area unusable Write data error code Conversion completed flag Type specification of a platinum resistance thermometer Read write area using a PLC CPU Read only area using a PLC CPU Read write area using a PLC CPU When using a PLC CPU the buffer memory addresses 10 11 18 to 21 and 35 are read areas Therefore never write with a PLC CPU because the A1S62RD3N 4N always overwrites a detected temperature value Thus even when
49. ssed according to the set processing method The result is stored in buffer memory There are three kinds of processing methods Sampling averaging processing setting Sample processing Time averaging processing Count averaging processing Values to the first and third decimal places are given _ e Value to first decimal place 16 bit signed binary Storage of a detected tem Example 53 8 C 538 perature value e Value to the third decimal place 32 bit signed binary Example 216 025 C 216025 If either channel disconnects it is detected and the disconnection detected flag is set The type of platinum resistance thermometer to be used is set There are two kinds of platinum resistance thermometers Platinum resistance thermometer type Standard Setting of a platinum resis tance thermometer 1997JIS type JIS C1604 1997 IEC 751 am2 Pt100 1989JIS type JIS C1604 1989 DIN 43760 1980 JPt100 Old JIS type JIS C1604 1981 Disconnection of Pt100 or cable is detected A68RDSN A1S62RD3N A disconnection at a channel is detected and the disconnection Disconnection detection detected flag that corresponds to that channel is set A68RD4N A1S62RD4N 3 SPECIFICATIONS 3 3 2 Conversion enable disable channel setting 1 2 Temperature detection enable disable is set for each channel Conversion enable Th
50. stored 1 The sampling count at a specified time varies with the number of channels setting time Sampling count number of channels used x 40 ms ms The sampling count is rounded down to 7 Example When channels 1 and 2 are used and the setting time is 60 ms 600 5 Sampling count 1 2 x 40 ms 1 75 i i 4 2 Section 3 5 gives the buffer memory to store a detected temperature value 3 SPECIFICATIONS 3 Count averaging processing Data conversion in the channel is done in the time set in the PLC CPU for averaging processing A detected temperature value is read per the sampling time in the range of 1 to 800 times and the average of the remaining values except for maximum and minimum values is stored in buffer memory Setting count Temperature Average Next average C Previous average Time The previous average is stored in the buffer memory until the average of the newly detected temperature value is stored 1 The sampling time at a specified count varies with the number of channels Sampling time setting count x number of channels used x 40 ms ms Example When channels 1 and 2 are used the setting count is 10 and 15 and the sampling time is as follows Setting Count Sampling Time to 10 times x 2 x 40 ms 800 ms 15 times x 2 x 40 ms 1200 ms 2 Section 3 5 gives the detected temperature value to store to the buffer memory 3
51. the time the switch is changed from the OFFSET GAIN position to the SET position is saved in the RD3N 4N internal memory as the offset gain value Test mode Increments decrements the offset value gain value for the channel being used at the following rate UP DOWN switch 1 ON for less than 1 5 seconds Increments decrements in 0 025 C units 2 ON for 1 5 seconds or more Increments decrements in 0 1 C unit every 0 04 seconds Test mode terminal Short the terminals when making error compensation Pt100 connecting terminal Connect the Pt100 See Section 4 5 Analog ground terminal Use to provide a separate ground 4 PRE OPERATION SETTINGS AND PROCEDURES 4 4 Error Compensation Detected temperature value The detected temperature value must be compensated to match the input temperature Error compensation is done a when starting up a system or b when a correct detected temperature value cannot be obtained Error compensation is done by reading a detected temperature value from the buffer memory with a sequence program and monitoring it with a peripheral device OFFSET GAIN The lower of the two val lt The higher of the two val ues to be compensated ues to be compensated UP DOWN adjustment of OFFSET GAIN A1S62RDSN RUN O 3 CHI The characteristics of the detected temperature value for input tempera ture are indicated below Compensate dete
52. tis warranty term Mitsubishi shall not be liable for compensation of damages caused by any cause found to be the responsibility of Mitsubishi loss in opportunity lost profits incurred to the user by Failures of Mitsubishi products special damages and secondary damages whether foreseeable or not compensation for accidents and compensation for damages to products other than Mitsubishi products replacement by the user maintenance of on site equipment start up test run and other tasks 5 Changes in product specifications The specifications given in the catalogs manuals or technical documents are subject to change without prior notice 6 Product application 1 In using the Mitsubishi MELSEC programmable controller the usage conditions shall be that the application will not lead to a major accident even if any problem or fault should occur in the programmable controller device and that backup and fail safe functions are systematically provided outside of the device for any problem or fault 2 The Mitsubishi programmable controller has been designed and manufactured for applications in general industries etc Thus applications in which the public could be affected such as in nuclear power plants and other power plants operated by respective power companies and applications in which a special quality assurance system is required such as for Railway companies or Public service purposes shall be excluded from the programmable controller
53. unt averaging 615 614 513 512 bii b10 69 58 67 66 65 b4 63 62 bi Specifying the channel where averaging Specify time count processing will be executed 1 Time averaging 1 Averaging processing 0 Count averaging 0 Sample processing For A1S62RD3N AN b2 through 67 and b10 through b15 are ignored When the averaging processing is not specified sample processing is set without regard to the time count specification Section 3 3 3 gives sample processing and averaging processing details 3 5 4 Buffer for averaging time count For AG8RD3N 4N Addresses 2 Through 9 for A1S62RD3N 4N Addresses 2 and 3 This area sets the time or count to perform averaging processing when averaging processing is designated 1 Whenthe power is tumed ON the averaging time and averaging count are set to O 2 The setting ranges are as indicated below Available setting range When A68RD3N AN is used When A1S62RD3NAN is used Averaging processing in terms of time 320 to 32000 ms 80 to 32000 ms Averaging processing in terms of count 1 to 800 times If a value outside of the above range has been written a setting error occurs and the buffer memory for averaging time count is rewritten However the RD3N AN performs conversion processing at the averag ing time or count previously set 1 Section 3 3 3 gives averaging time count details 3 SPECIFICATIONS 3 5 5 Buffer for detected temperature value For AGSRDSN AN
54. wing table gives the performance specifications of the RD3N AN Table 3 2 Performance Specifications tem A68RD3N AG8RDAN A1S62RD3N A1S62RD4N 16 bit signed binary data 1800 to 6000 Value to first decimal place x 10 times 32 bit signed binary data 180000 to 600000 Value to third decimal places x 1000 times JPt100 JIS 1604 1981 Accuracy 1 accuracy relative to full scale rent Across platinum resistance thermometer input PLC power supply Photocoupler insulated Across platinum resistance thermometer input channel Non insulated Dielectric withsland voltage Across platinum resistance thermometer input PLC power supply Detected channel Batch detected Detected channel Batch detected Wire break detection by channel on all channels by channel on ail channels Number of occupied I O points Connection terminals 38 point terminal block 20 point terminal block Applicable wire size 0 75 to 2mm 0 75 to 1 5mm V1 25 3 V1 25 YS3A V2 S3 V2 YS3A Output temperature value Applicable platinum resistance thermometers Temperature input range Insulation method Applicable crimping terminals Cable across RD3N AN platinum resistance thermometer Internal current consumption BVDC 0 94A 0 41A 0 49A 0 43kg 0 27kg 0 27kg 250 9 84 H 37 5 1 48 W 131 5 16 D 130 5 12 H 34 5 1 36 W 107 4 4 23
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