Hitachi EH-150 User's Manual
Contents
1. Make additional circuits depending on the situation 8 2 MG 9 Mounting 5 1 Installation 1 EH PT4 module can be installed on both the basic base and expansion base 2 Precaution on installation Upon the installation of the EH 150 series consider the operability maintainability and environment a For use at proper ambient temperature range e Secure a sufficient space allowing a good ventilation Do install the module just over a device generating a great amount of heat such as heater transformer and large capacity resistor f the ambient temperature around the module exceeds 55 C set a fan or air conditioner to keep the temperature below 55 C b C d e Do not install the module in panel provided with a high voltage device Keep more than 300 mm away from a high voltage line and power line d Installing the basic base 1 000 mm through 1 600 mm from the floor improves the operability Secure a dearance of more than 50 mm between the upper and lower sections of the module for ventilation and maintenance For theright and left directions secure a dlearanceof morethan 10 mm f Never pull out or insert a alive line of the module Mounting Method 1 Checking a connector Before and after the installation check the following two points Is there an abnormality on the connector of the basic base or extensive base b Is there an abnormality in the2. assumes no responsibility for errors that may appear in this manual As the product works with user program and Hitachi Industrial Equipment Systems Co Ltd cannot test all combination of user program components it is assumed that a bug or bugs may happen unintentionally If it is happened please inform the fact to Hitachi Industrial Equipment Systems Co Ltd or its representative Hitachi will try to find the reason as much as possible and inform the countermeasure when obtained Nevertheless Hitachi Industrial Equipment Systems Co Ltd intends to make products with enough reliability the product has possibility to be damaged at any time Therefore personnel who are to install and operate the equipment have to prepare with the countermeasure such as power off switch can be operated independently of the controller Otherwise it can result in damage to equipment and or serious injury to personnel Safety Precautions Read this manual and related documents thoroughly before installing operating performing preventive maintenance or performing inspection and be sure to use the unit correctly Use this product after acquiring adequate knowledge of the unit all safety information and all cautionary information Also make sure this manual enters the possession of the chief person in charge of safety maintenance Safety caution items are classified as Danger and Caution in this document Cases where if handled incorrectly a dan
3. Make a short circuit on unused channel shown as the figure Thetemperature data becomes H 7FFF Grounding Note2 External power supply 24VDC Figure 5 1 External Wiring Note 1 The external wire length shall be less than 200 m for each channel addition the total resistance of the wires of each channels to be connected to the current terminals 0 to BO to B3 shall be less than 400 ohm Note 2 Use shielded cable and connect shielded to functional earth on the both sides or one side which depends on the noise environment Note 3 The earth terminal on the power supply module and External power supply 24 VDC must be connected to the functional earth When functional earth area doesn t do temperature data sometimes become unstable The data becomes unspecified 5 1 6 Settin 6 Setting 6 1 Setting of temperature range This module can be set to three temperature ranges by the dip switch shown in below Table 6 1 Temperature rage setting Temperature measurement range a 20 to 440 C 12345678 Pt100 50 to 400 12345678 un a a u lu nl n 50 to 4400 C 12345678 Note Do not use the setting which is not written in the table because the temperature data becomes undefined Setting switch Switch 1 aaga 6 1 7 Collection of Temperature Data 7 Collection of Temperate Data B 1 1 0 Allocation The temperature data of each channel
4. ON Y5 Data error lamp a E al WX40 Air temperature on OFF 12345678 WX41 Temperature at the upper part of the liquid WX42 Temperature at the lower part of the liquid WX43 Motor temperature 10 1 10 Example of Programming 3 Program DX0040 DX0042 H00000 WROO00 WROO01 WRO002 WRO003 4 0000 lt gt WROO04 0001 WROOO2 ABS WROO04 WROO004 0000 007 lt WR0004 R003 R004 H0800 lt WR0001 H0800 lt WR0001 WR0001 WR0000 WR0001 lt WR0000 WROO05 lt H0198 HOLEC lt WR0005 550 10 2 The program stores the temperature data for 4 channels in the internal output Data check When an error is found the program turns M4 on The program stores the absolute value of the temperature difference between the upper part and the lower part of the liquid in WR4 When the temperature difference is 89C or higher the program turns RO on When the motor temperature is 100 or higher the program turns R2 on When the temperature at the upper part of the liquid is 50 or higher the program turns R3 on When the temperature at the lower part of the liquid is 50 or higher the program turns R4 on The program stores the difference between the temperature at the upper part of the liquid and the air temperature WR5 When the air temperature is higher than the temperature at the upper part of the liquid the program turns R5 on Wh
5. connector or the module side 2 Confirming the external wiring Before running confirm the following items a Check that the connection of the external wiring is proper b Check that the external wiring terminal board and the module are fastened securely with Screws Maintenance and Inspection Perform periodic inspection every six months according to the procedure mentioned below 1 Remove dust and dirt off the terminal board 2 Confirm that the fixing screws of the external wiring terminal board and module are tightened firmly 9 1 9 Mountin 9 4 Precautions on E xternal Wiring Because the external wiring of the EH PT4 handles fine signals be sureto use a shielded wire to suppress the influence of external noise and place the wire separately from the power line and signal line of different voltage Wiring cable shielded wire of EH PT4 module Wiring cable shielded wire of 00 mm or more Other signal cables FH PT4 module Other signal cables Metallic conduit puis cable Note Weld joints of metallic conduits and ground the welded metallic conduits Grounding in accordance with local legal requirements Figure 9 1 Wire Separation by Conduits or Ducts Caution Use an external power supply which the over current protection character is as below Pe aes current detection 1ndino Load current Figure 9 2 Over current protection character 9 2 10 Example of Programmi
6. grounding FE terminal If grounding is not performed there is a risk of electric shocks and malfunctions AN CAUTION e Connect power supply that meets rating If a power supply that does not meet rating is connected fire may be caused e The wiring operation should be performed by a qualified personnel If wiring is performed incorrectly it may result in fire damage or electric shock 3 Precautions when using the unit lt gt DANGER e Do not touch the terminals while the power is on There is risk of electric shock e Structure the emergency stop circuit interlock circuit etc outside the programmable controller hereinafter referred to as PC Damage to the equipment or accidents may occur due to failure of the PC However do not interlock the unit to external load via relay drive power supply of the relay output module AN CAUTION e When performing program change forced output RUN STOP etc while the unit is running be sure to verify safety Damage to the equipment or accidents may occur due to operation error e Supply power according to the power up order Damage to the equipment or accidents may occur due to malfunctions 4 About preventive maintenance lt gt DANGER Do not connect the of the battery in reverse Also do not charge disassemble heat place in fire or short circuit the battery There is a risk of explosion or fire Q PROHIBITED e Do not disassemble or modify
7. is collected in the CPU as the temperature conversion data corresponding to the temperature 1 1 O assignment The I O assignment shall be set as WXAW by your programming software or the peripheral equipment 2 allocation Depending on the module installation position the temperature conversion data is stored in the word input number shown below Channel 1 temperature Channel 2 temperature conversion data Channel 3 temperature conversion data Channel 4 temperature conversion data Figure 7 1 The setting of Slot number EH PT4 n is determined by the module installation position as shown below 000000000 n 0 Allocation address WXG nI woa number 0 03 Slot number 0 to 7 Unit number 01401 Figure 7 2 7 1 7 Collection of Temperate Data Temperature Data 1 Content of temperature conversion data range 50 to 400 C Pt100 Pt1000 The meaning of the each bit bO to b15 of temperature conversion data in WX is as shown below The sum of the bit 1 is the measured temperature b15 514 b13 012 011 b10 b9 b8 07 b6 b5 b4 b3 b2 bl bO 800 200 50 12 5 3 125 0 781 0 195 0 0488 UR 400 100 25 6 25 1 563 0 391 0 0977 0 0244 For example Note 1 HF800 1111 1000 0000 0000 HF H8 HO HO 800 400 200 100 50 50 C 0000 0110 0000 0000 HO H6 HO HO 25 12 5 325 C When an input error occurs be
8. the unit These actions may result in fire or malfunction CAUTION e Turn off the power supply before removing or attaching module unit Electric shock malfunction or failure may result Revi sion No Content Date Manual No Table of contents 1 Introduction 1 1 to 1 4 1 1 Before Use 1 2 12 Precaution on Use 1 3 1 3 Features 1 3 14 Principle of Operation 1 4 2 Structure and Nameplate 2 1 Structure and Name of Each Part TTTTITITITITITITITITITITITITITITITITITITT 3 Spedification 3 1to 3 2 3 1 Specification list 3 1 3 2 Terminal layout and internal circuit 3 2 4 Block Diagram 41 Internal Block Diagram 1 5 External Wiring 5 1 5 1 Resistance Temperature Detective Connection M ethod and External Wiring 6 Setting 6 1 Setting of Temperature Range 1111111111111 7 Collection of Temperature Data 7 1 to 7 7 7 1 1 0 Allocation 7 1 7 2 Temperature Data 7 2 7 3 Example of Calculation 7 4 7 4 Correspondence Table b
9. 10 C at PT 100 or 2500 ohm corresponding to about 410 C at PT 1000 except when the lineis broken the temperature conversion data is unstable 1 3 Features 1 EH PT4 applies for two kinds of platinum resistance temperature detectives Pt100 IEC 751 and Pt1000 2 Temperature measurement range Three kinds of ranges selected by switch Resistance temperature Temperature rement Accuracy C detectives range 2C 100 50 to 400 Pt100 20 to 40 Pt1000 50 to 400 3 Because the accuracy of the temperature measurement range 20 to 40 is 0 5 C EH PT4 is suitable for exact measurement 4 Temperature conversion data signed 15 bits 5 Number of Inputs 4 channels 3 wire system 1 3 2 Structure and Nameplate 2 Structure and Nameplate 2 1 Structure and Name of Each Part 4 Setting Switch Function Remarks No 1 Lock button This is used when removing the module from the base unit After it is installed to the base unit the fixation can be reinforced using screws In this case use M 4x10mm screws 2 1 O cover This is the cover attached to the terminal block _ area 3 Terminal block This is the terminal block for connecting input signals The terminal block can be connected or disconnected Setting Switch This is used for setting of temperature range Refer chapter 6 Detailed explanation module receives input signals from outside Pera HOD ex
10. Co Ltd IMPORTANT THIS EQUIPMENT GENERATES USES AND CAN RADIATE RADIO FREQUENCY ENERGY AND IF NOT INSTALLED AND USED IN ACCORDANCE WITH THE INSTRUCTION MANUAL MAY CAUSE INTERFERENCE TO RADIO COMMUNICATIONS AS TEMPORARILY PERMITTED BY REGULATION IT HAS NOT BEEN TESTED FOR COMPLIANCE WITH THE LIMITS FOR CLASS A COMPUTING DEVICES PURSUANT TO SUBPART J OF PART 15 OF FCC ROULES WHICH ARE DESIGNED TO PROVIDE PEASONABLE PROTECTION AGAINST SUCH INTERFERENCE OPERATION OF THIS EQUIPMENT IN A RESIDENTIAL AREA IS LIKELY TO CAUSE INTERFERENCE IN WHICH CASE THE USER AT HIS OWN EXPENSE WILL BE REQUIRED TO TAKE WHATEVER MEASURES MAY BE REQUIRED TO CORRECT THE INTERFERENCE LIMITED WARRANTY AND IMITATION OF LIABILITY Hitachi Industrial Equipment Systems Co Ltd Hitachi warrants to the original purchaser that the programmable logic controller PLC manufactured by Hitachi is free from defects in material and workmanship under normal use and service The obligation of Hitachi under this warranty shall be limited to the repair or exchange of any part or parts which may prove defective under normal use and service within eighteen 18 months from the date of manufacture or twelve 12 months from the date of installation by the original purchaser which ever occurs first such defect to be disclosed to the satisfaction of Hitachi after examination by Hitachi of the allegedly defective part or parts This warranty in expressly i
11. HITACHI PROGRAMMABLE CONTROLLER MIDIG H 15O RESISTANCE TEMPERATURE DETECTIVE INPUT MODULE 4 APPLICATION MANUAL 1 324 WARNING To ensure that the equipment described by this manual As well as all equipment connected to and used with it operate satisfactorily and safety all applicable local and national codes that apply to installing and operating the equipment must be followed Since codes can vary geographically and can change with time it is the user s responsibility to determine which standard and codes apply and to comply with them FAILURE TO COMPLY WITH APPLICABLE CODES AND STANDARDS CAN RESULT IN DAMAGE TO EQUIPMENT AND OR SERIOUS INJURY TO PERSONNEL INSTALL EMARGENCY POWER STOP SWITCH WHICH OPERATES INDEPENDENTLY OF THE PROGRAMMABLE CONTROLLER TO PROTECT THE EQUIPMENT AND OR PERSONNEL IN CASE OF THE CONTROLLER MALFUNCTION Personnel who are to install and operate the equipment should carefully study this manual and any other referred to by it prior to installation and or operation of the equipment Hitachi Industrial Equipment Systems Co Ltd constantly strives to improve its products and the equipment and the manual s that describe it may be different from those already in your possession If you have any questions regarding the installation and operation of the equipment or if more information is desired contact your local Authorized Distributor or Hitachi Industrial Equipment Systems
12. ay increase slightly Because a resistance temperature detective has an error confirm it beforehand Note 2 This is the case when the current terminal wiring is broken In case the voltage terminal wiring is broken the data becomes unspecified H of H 7F FF means the following data is hexadecimal 3 1 3 Specification 3 2 Terminal layout and internal circuit Signal name PTINOIN 1 2 or 3 2 v c 5 Internal power circuit Note 1 Current terminals and a voltage terminals of unused channels should be wired By this wiring read data becomes H 7FFF 3 2 4 Block Diagram 4 Block Diagram 4 1 Internal Block Diagram Figure 4 1 shows the internal block diagram External wiring Input conversion circuit Nez PR Ide Tes 7 NEU Shielded wire Timing CPU Bus control onstant current circuit Photocoupler insulation External grounding 1 PIMS 24V DC External power Supply 52 UNS 24V DC circuit Figure 4 1 Internal Block Diagram Note V F conversion refers to the conversion of voltage V to frequency F 4 1 5 External Wirin 5 External Wiring 5 1 Resistance Temperature Detective Connection Method and External Wiring A0to3 Current terminal BOto3 Current terminal bO to 3 Voltageterminal External wiring Notel Use a shielded cable
13. between temperature conversion data and actual temperature Temperature C Temperature conversion data signed decimal data 409 6 Note bO is always O in normal time Relation between the temperature and temperature conversion data b Temperature conversion data hexadecimal 20 to 440 C 4000 H 3000 EE EE EM H 2000 H 1000 EE T EEE ANE TEE E 0 5 10 20 30 40 Temperate C Figure 7 4 7 3 7 Collection of Temperate Data Example of Calculation The program shown below as an example converts the temperature conversion data in WRO to BCD 4 digit data WM6 In case the temperature is minus the bit internal output RO will be turned on EXT DMOO00 WRO0OO00 DM000 000 5 100 DMO02 DMOO00 S 4096 RO DM002 S lt 0 ABS WM004 WM002 BCD WMOO06 WMO004 1 Because the calculation with sign is that by double words extend the word temperature conversion data WRO to double word data stored in DM 0 2 3 Calculate by the expression mentioned on previous page Because the calculation with decimal point dividing by 40 96 is not possible multiply the numerator with 100 2 and then divide by 4 096 3 4 When the temperature data result of calculation is minus the RO is turned on 5 Turn to an absolute variable for plus tenperature data use as it is and for minus temperature data remove the sign to turn it to a plus val
14. during transport If any failures is found contact the sales office 3 The accessories listed in Table 1 2 are supplied Table1 2 Packagecontentslist of resistancetemperaturedetectiveinput module Contents Quantity Remarks 1 Resistance temperature detective input module body 2 cover 3 Operation manual 1 2 1 ntroduction n Precautions on Use 1 Before the installation and removal of the module turn off the power 2 Before the connection of the external wiring and removal of the terminal board turn off the power 3 The terminal board handles fine signals Therefore upon handling the module or wiring be careful not to apply a voltage on it by mistake or leave it under the influence by excessive static electridty 4 Upon the connection of external wiring before work eliminate static electricity by touching a grounded metal bar to prevent it from being damaged by excessive static electricity charged on the human body To prevent a malfunction due to static electricity do not touch the terminal during power feeding 5 When the connection cable to a resistance temperature detective is cut the temperature conversion data becomes abnormal If the temperature data exceeds the normal range to protect the external devices adjust the control system so that the external devices operate with safety 6 If the resistance of a resistance temperature detective RTD exceeds 250 ohm corresponding to about 4
15. el Note 1 At the range from 50 to 4400 of Pt100 the input temperature range is from 50 to 400 C But the temperature data output is from 60 to 4109 C Note 2 In case of Pt1000 the resistance is 10 times of PT 100 7 Collection of Temperature Data 1 Pt100 20 to 40 C range Table 7 4 2 EEIQ 50 to 40 range Temperature conversion data 9 data data resistance EMEN NC CNN 96 09 98 04 DUNT ENT 100 00 101 95 Eo 103 90 105 85 107 79 109 73 3 61 E o 2 5 54 7 47 Note 1 At the range from 20 to 440 of Pt100 the input temperatureinput rangeis from 20 to 440 C But the temperature data output is from 25 to 45 C p o 7 6 8 Error Deception Processing 8 Error Detection Processing Measured Temperature Range over 1 1 nterlock f temperate conversion data is over the measuring range or current terminal wiring is disconnected the temperature conversion data becomes H 7FFF After this data is read it is necessary to make a program externally for the treatment for an error Example of an error detection program The program checks for error data When one error data lt is found M8 is turned on For error data Yb is turned on Xa is for reset Please take a proper countermeasure by using the coil Yb at error detection M8 ON Set the numbers of the sectio
16. en the temperature difference is 109 or lower the program turns R6 on When the temperature difference is 10 or higher the program turns R7 on If ROor R1turns on turn the motor for a minute However if Y3 turns on do not turn the motor 10 Program When R2 is turned on the program turns the motor error lamp on Turn on any one of R1 R3 R4 R7 and M4 to turn on the cooler and turn off the heater Turn on any one of R1 R3 and R4 to light the temperature abnormality lamp Turn on M4 to light the data abnormality lamp Turn on either R5 or R6 to turn on the heater and turn off the cooler 10 3 10 Program 10 2 Example of Programming 2 Offset adjustment The resistance temperature detective itself has an built in error therefore an offset error may occur in temperature conversion data An offset error occurs due to the change with the passage of time also An example of correction by programming in this case is shown below However because an actual offset value is not always a specified value it cannot be corrected completely The offset error refers to the deviation of any temperature conversion data from the reference value Note in a specified rate The offset error means the constant deviation from the reference value Example of offset Note Measure a reference value using a Temperature conversion data Reference alus measuring device with higher accuracy than EH PT4 Or c
17. epair notify us of the details of the abnormal condition 3 For troubleshooting the following tools are necessary a Phillips screwdriver and slotted screwdriver b Digital multi meter circuit tester c Oscilloscope necessary depending on the case 11 1 12 Appendix 12 Appendix 121 Calculation of External Wiring Resistance Assuming that the cross section and length of tinned annealed copper wire are S mrr L m the resistance R Q of the wireis R 0 01854 1 S For example for a cable whose cross section is 0 18 mm and length is 200 m the resistance is R amp 0 01854x 200 0 18 2060 Because the current terminal of EH PT4 doubles in both ways the resistance also doubles 20 6 0 2 4120 Because this resistance is the value when the ambient temperature around the wire is 20 C if the ambient temperature is over 20 C the resistance rises The rise 1 C is about 0 4 In case the ambient temperature is 40 C the resistance is R 412 x 1 0 004 40 20 44 50 Concerning the details of resistance investigate individually for each wire It may be slightly different from the calculated value Reference In the case of Hitachi twisted shielded cable CO DS IREVV SX 10 pairs to 52 the maximum conductor resistance in the cross section of 0 18mm under the temperature 20 C i 121 5 ohm km according to Hitachi s Guide Book 12 1
18. etailed operation method of the programming unit 1 Instruction word programmer PGM CHH Instruction word programmer manual NB981X 2 Portable indication programmer PGM GPH Portable indication programmer manual NB982X 3 LADDER EDITOR FOR WINDOWS HLW PC3 Programming manual NJ1 206X 4 LADDER EDITOR FOR DOS HL AT3E Programming manual NB335X 2 EH 150 APPLICATION MANUAL NJ 1 280 means revision of manual and up to A B in order Reference What is Resistance Temperature Detective RTD This is also called as Resistance Thermometer Sensor Refers to the device measuring the temperature by using the metal s property that its electric resistance changes with the temperature and is often made of Pt 100 ohm platinum with a resistance of 100 ohm at 0 C As for the principle of the measurement by feeding a constant current of 1 through 5 mA 2 mA in this module to a resistance temperature detective the change of resistance due to that of temperature is measured as the change of voltage Use a resistance temperature detective complying with IEC 751 for this module 1 1 1 1 ntroduction 1 Before Use The resistance temperature detective input module hear after EH PT4 has been carefully manufactured but you are kindly advised to make the following checks on receipt of it 1 The type and specification of the module are as specified by the order 2 No damage is caused to the equipment
19. etween Temperature and Temperature Data 7 5 8 Error Detection Processing 8 1 to 8 2 8 1 Measured Temperature Range Over 8 1 8 2 Treatment for Sudden Change of Temperature Conversion Data 8 2 9 Mounting 9 1 to 9 2 9 1 Installation 9 1 9 2 Mounting M ethod 9 1 9 3 Maintenance and Inspection 9 1 9 4 Precautions on External Wiring 9 2 10 Example of Programming 10 1 to 10 4 10 1 Example of Programming 1 TTTITITITITITITITITITITITITITITITITITTTTITTILO 1 10 2 Example of Programming 2 Offset adjustment 9 4 11 Troubleshooting 11 1 111 The Allocation Error 41 is indicated in 1 1 112 Data Error in a Specific Channel TTTTILETLLLTLELLELLELETTEELTELELTELEELELELEELIEIL 1 1 11 3 Data Error All Channels TTTITITITITITITITITITITITITITITITITITITITITI1 1 1 12 Appendix 12 1 12 1 Calculation of External Wiring Resistance TTTTTTTTTLTLTLTTILTTITLLLTITILTTILTIL2 1 1 1 ntroduction 1 Introduction This manual describes how to operate the EH PT4 Resistance Temperature Detective input module properly which is one of the special function module of EH 150 Programmable Logic controller PL C Carefully read this manual to familiarize yourself with the procedures respectively of installation operation and maintenance and inspection Please be sure to read the related application manuals too Table 1 1 Reference Manual list 1 About the d
20. gerous circumstance may be created resulting in DANGER z E possible death or severe injury Cases where if handled incorrectly a dangerous circumstance be created resulting CAUTION in possible minor to medium injury to the body or only mechanical damage However depending on the circumstances items marked with CAUTION may result in major accidents In any case they both contain important information so please follow them closely Icons for prohibited items and required items are shown below Indicates prohibited items items that may not be performed For example when open flames are prohibited 60 is shown o Indicates required items items that must be performed For example when grounding must be performed e is shown 1 About installation AN CAUTION e Use this product in an environment as described in the catalogue and this document If this product is used in an environment subject to high temperature high humidity excessive dust corrosive gases vibration or shock it may result in electric shock fire or malfunction e Perform installation according to this manual If installation is not performed adequately it may result in dropping malfunction or an operational error in the unit e Do not allow foreign objects such as wire chips to enter the unit They may become the cause of fire malfunction or failure 2 About wiring 9 REQUIRED e Always perform
21. low 51 C and over 410 C the temperature conversion data is H7FFF following relation exits between temperature conversion data and actual temperature 2 H 0600 Temperature C Temperature conversion data signed decimal data 40 96 Note 0 is always 0 in normal time Relation between the temperature and temperature conversion data Temperature conversion data hexadeci mal 50 to 400 C HIA000 eerie eda ct ade H 3000 Aci Nd 2000 iiiaae H 1000 Baer H0800 J l 0 H 0 50 100 200 300 400 Temperate C Figure 7 3 7 2 7 Collection of Temperate 2 Content of temperature conversion data range 20 to 40 C Pt100 The meaning of the each bit bO to b15 of temperature conversion data in WX is as shown below The sum of the bit 1 is the measured temperature b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 04 03 b2 bl b0 80 20 5 1 25 0 3125 0 78125 0 1953125 0 0488281 C 40 10 2 5 0 625 0 15625 0 390625 0 0976562 0 024414 Note lt example gt 1 HEOOO 1110 0000 0000 0000 HE HO HO HO 800 40 20 20 C 2 0600 0000 0110 0000 0000 HO H6 HO HO 2 5 1 25 3 75 C When an input error occurs below 25 C and over 45 C the temperature conversion data is H7FFF following relation exits
22. mioka Nakajo machi Kitakanbara gun Niigata ken 959 2608 JAPAN Copyright 2002 by Hitachi Industrial Equipment Systems Co Ltd All Right Reserved Printed in Japan The Information and or drawing set forth in this document and all right in and to inventions disclosed herein and patent which might be granted thereon disclosing or employing and the materials methods techniques or apparatus described herein are the exclusive property of Hitachi Industrial Equipment Systems Co Ltd No copies of the information or drawings shall be made without the prior constant of Hitachi Industrial Equipment Systems Co Ltd Hitachi Industrial Equipment Systems Co Ltd provides customer assistance in varied technical areas Since Hitachi does not possess full access to data concerning all of the uses and applications of customer s products responsibility is assumed by Hitachi neither for customer product design nor for any infringement of patents or rights of others which may result from Hitachi assistance The specifications and descriptions contained in this manual were accurate at the time they were approved for printing Since Hitachi Industrial Equipment Systems Co Ltd Incorporated constantly strives to improve all its products we reserve the right to make changes to equipment and or manual at any time without notice and without incurring any obligation other than as noted in this manual Hitachi Industrial Equipment Systems Co Ltd
23. n lieu of all other warranties expressed or implied including the warranties of merchantability and fitness for use and of all other obligations or liabilities and Hitachi neither assumes nor authorizes any other person to assume for Hitachi any other liability in connection with the sale of this PLC This warranty shall not apply to this PLC or any part hereof which has been subject to accident negligence alternation abuse or misuse Hitachi makes no warranty whatsoever in respect to accessories or parts not supplied by Hitachi The term original purchaser as used in this warranty shall be deemed to mean that person for whom the PLC in originally installed In no event whether as a result of breach of contract warranty tort including negligence or otherwise shall Hitachi or its suppliers be liable for any special consequential incidental or penal damages including but not limited to loss or profit or revenues loss of use of the products or any associated equipment damage to associated equipment cost of capital cost of substitute products facilities services or replacement power down time costs or claims of original purchaser s customers for such damages To obtain warranty service return the product to your distributor or send it with a description of the problem proof of purchase post paid insured and in a suitable package to Quality Assurance Dept Hitachi Industrial Equipment Systems Co Ltd 46 1 Ooaza To
24. n verify error 1 O assignment information and actual loading of module do not much Error codes are output as a hexadecimal to the WRF 000 1 Check the 1 0 assignment CPU 2 Check the connection between the module and base 3 A defect may occur from the other modules Check the other modules too 11 2 Data Error in a Specific Channel The type of data errors are a unstable data b loss of accuracy and c that data is H7FFF 1 Check if the wire for the data undergoing an error in its amount is connected properly 2 Check if the wiring is placed the same route as the power line if so noise is induced 3 Check if the terminal board screws are tightened securely 4 Check if the resistance temperature detective is the PT100 PT 1000 complying with IEC 751 5 Check if the external wiring resistance current terminal wiring is less than 400 ohm 6 Check if a measured temperature is out of the specification rage of EH PT4 5 Data Error in All Channels The data of all channels may become H 7F FF 1 If there is an unused channel check if its current terminal is correct 2 Check the output voltage of external power supply Check if the wiring of the current terminal is disconnected 3 Check the capadity of the external power supply Output current 1A or more Precautions 1 Before replacing the module be certain to turn off the power 2 Upon returning a module for a r
25. ng 10 Example of Programming 10 1 Example of Programming 1 1 Control contents a The program keeps the temperature of a liquid in a bath 10 to 12 higher than that of ambient air temperature b When the temperature difference between the upper part and the lower part of the liquid is 39C or higher the program turns a stirrer on c When the temperature of the liquid exceeds 50 or the temperature difference between the upper part and the lower part of the liquid exceeds 8 the program turns a temperature error lamp on to indicate an error and starts a cooler d When error data is found the program turns a data error lamp on and starts the cooler When error data is found the program turns data error lamp on and starts cooler f When an error occurs the program stops a heater Motor temperature Air temperature Lamp indication Cooler Temperature at the upper error ture error part of the liquid error Heater n Platinum resistance temperature detective PT100 Temperatureat thelower part of the liquid Figure 10 1 External device 2 Configuration and allocation 0 1 2 3 4 Install EH PT4 on the fourth slot Use the relay output module installed on the slot to output to the external device Basic base Figure 10 2 PLC configuration Y 0 Motor Setting of temperature range Y 1 Cooler Pt100 50 to 400 C Y 2 Heater Y 3 Motor error lamp Y 4 Temperature error lamp
26. ns a and b corresponding to the actual system 8 1 8 Error Detection Processin Treatment for Sudden Change of Temperature Conversion Data When the temperature conversion data is changed suddenly due to the disconnection of external wiring or influence of noise the system judges it to be an abnormal condition In the example shown below every scanned data is read in If a change of 5C N ote or morefromthe previously read data is found the condition is judged to be abnormal and data is aborted Note Change each value to your system Example of program Every scanned data is read in and the data is stored in DRO and DR2 For only the initial scanned data put the read into the previous data DR8 to DRA The absolute value of the difference between the previous data and read WR0008 data is calculated R0008 WROOO00 R0009 WROOO1 WR0009 ROOOA WROOO2 WR000A ROOOB WROOO03 ABS WROOOB WROOOB If the difference between the previous data and read data is less than 59C put the read data into WR10 to WR13 In the following ane program the values of WR10 to WR13 are treaded a s normal value HOOCC WROOOA lt HOOCC WROOOB Updates the previous data When an error occurred the data is not updated and instead the previous data is held In the example of this program no protective action or warning against abnormal data is performed
27. onnect a resistor with a high accuracy instead EH 150 of the resistance temperature device temperature and obtain a direct offset error For the conversion data relationship between the temperature side offset and resistance see Table 7 2 A Offset error Temperature amp C 1 Adjustment procedure a Decide whether an offset error is on side toward a reference value b Obtain a temperature conversion data corresponding to offset error Offset error Temperature conversion data DE H 0028 or H 002C 29 0050 0054 H0078 or 007 4 C HOOAO or H00A4 5 C or HOODO offset error is on side toward the reference value subtract the value obtained b from the temperature conversion data If it is on side add the value obtained in b to the temperature conversion data 2 Example of programming The configuration is the same as the example of programming 1 If the channel 2 has 2 C offset subtract H0050 from the temperature conversion data WX0042 WX0040 WX0041 WX0042 H0050 WX0043 10 4 11 Troubleshooting 11 Troubleshooting If you have some problems please find the cause according to the following countermeasures If the problem is not solved despite this countermeasures contact the sales office If aspare unit is available replace and see the condition ua The Allocation Error 41 is indicated in CPU Error code 41 is 1 0 informatio
28. pan at On ile the module energized The CPU module recognizes the status of the loaded module and when it matches the I O assignment information included in the user program Input information is received according to the contents of the user program Terminal block The screws for the terminal block are M3 screws Use a crimp terminal that fits the screw diameter The maximum thickness of the cable should be only up to 0 75 SQ The recommended crimp terminal is indicated below 2 1 8 Specification 3 Specification 3 1 Specification list Table 3 1 shows the specifications of EH PT4 Table 3 1 Specification Resistance temperature detective Platinum resistance temperature detective Pt100 IEC 751 Platinum resistance temperature detective Pt1000 Signed 15 bits In normal state the lowest bit is always 0 Accuracy Note 1 Temperature measurement range 20 to 40 C 50 to 400 2mA constant current method Photocoupler insulation Non insulation Internal current consumption 200mA max 5 V DC Error detection 20 to 440 Pt100 H7FFF is outputted at 25 C or less or at 445 C or higher 50 to 4400 C Pt100 Pt1000 H7FFF is outputted at 60 C or less or at 4410 C or higher Processing for disconnection Note 2 H7FFF is outputted to channel Note 1 The accuracy is the value when 10 minutes pass after the start of power feeding ust after power is fed the value m
29. ue Use WMO because the result of calculation can be incorporated in a word less than 16 bits 6 WM 4is converted to BCD 4 digits vaule WM6 7 4 7 Collection_of Temperature Data la Correspondence Table between Temperature and Temperature Data 1 Pt100 Pt1000 50 to 400 range Table 7 4 1 Pt100 50 to 400 range Temperature conversion data Hexadecimal data data data resistance Notel Note 2 Notel 60 63078 666 72 33 110 45 63693 F8CC 82 29 140 109 99896 H999 3 S 27 159v 55390 ee 4 645121 coo 90 19 180 64717 92 16 7 190 65126 FE66 96 09 210 5 0 0000 100 00 230 410 0199 103 90 250 614 0266 105 85 260 p 819 70332 107 79 270 1024 0400 109 73 280 2048 0800 119 40 330 80 3277 0ccc 130 89 390 85 3482 0099 132 80 7400 90 3686 0 66 134 70 410 95 238547 40599 199 60 2 100 4096 1000 138 50 Decimal data Pt100 resistance Note 2 4915 1333 14606 5734 i666 153 58 6554 1999 161 04 11469 2 204 88 12288 3000 11269 3199 215 133107 3939 22 16384 4000 1679 199 250 48 eee gestam oce pu pi g
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