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                                                                 7. Collection of Temperate

7-3

(2) Content of temperature conversion data [range : -20 to +40 

°

C] (Pt100)

  The meaning of the each bit( b0 to b15) of temperature conversion data (in WX**) is as shown
below.
The sum of the bit “1” is the measured temperature.

   <For example>

(1) HE000 = 

1110  0000  0000  0000"

                         (HE)  (H0)  (H0)  (H0)

   

 -800 + 40 + 20 = - 20 

°

C

            (2) H0600 = 0000  0110  0000  0000"
                         (H0)  (H6)  (H0)  (H0)
   

 2.5 + 1.25 = 3.75 

℃

When an input error occurs( below -25

°

C and over 45

°

C), the temperature conversion data is

H7FFF.
The following relation exits between temperature conversion data and actual temperature.
 

Temperature (

°

C) =

         

Note) “b0” is always “0” in normal time.

Relation between the temperature and temperature conversion data

Figure 7.4

b15 b14 b13 b12 b11 b10 b9 b8 b7

b5

b6

b4

b3

b2

b1 b0

(

°

C)

-80

40

20

10

5

2.5

1.25

0.625

0.3125

0.15625

0.78125

0.390625

0.1953125

0.0976562

0.0488281

0.024414

Note)

H4000

H3000

H2000

H1000

H0800

-20

0

5

10

20

30

40

HE000

Temperate (

°

C)

b)Temperature conversion data(hexadecimal) -20 to +40 

°

C

Temperature conversion data(signed decimal data)

409.6

Summary of Contents for HIDIC EH-150 EH-PT4

Page 1: ...HITACHI PROGRAMMABLE CONTROLLER RESISTANCE TEMPERATURE DETECTIVE INPUT MODULE EH PT4 APPLICATION MANUAL NJI 324 X ...

Page 2: ...tion 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 Eq...

Page 3: ...onnection 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 ...

Page 4: ...oved 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 assumes no responsibility for errors that may appear in this manu...

Page 5: ...ances items marked with 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 is shown Indicates required items items that must be performed For example when grounding must be p...

Page 6: ... the terminals while the power is on There is risk of electric shock l 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 CAUTION l When performing...

Page 7: ...ble heat place in fire or short circuit the battery There is a risk of explosion or fire PROHIBITED l Do not disassemble or modify the unit These actions may result in fire or malfunction CAUTION l Turn off the power supply before removing or attaching module unit Electric shock malfunction or failure may result ...

Page 8: ...R e v i s i o n N o C o n t e n t D a t e M a n u a l N o ...

Page 9: ...Temperature Detective Connection Method and External Wiring 5 1 6 Setting 6 1 6 1 Setting of Temperature Range 6 1 7 Collection of Temperature Data 7 1 to 7 7 7 1 I O Allocation 7 1 7 2 Temperature Data 7 2 7 3 Example of Calculation 7 4 7 4 Correspondence Table between 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 Treatmen...

Page 10: ... 2 Example of Programming 2 Offset adjustment 10 4 11 Troubleshooting 11 1 11 1 The Allocation Error 41 is indicated in CPU 11 1 11 2 Data Error in a Specific Channel 11 1 11 3 Data Error in All Channels 11 1 12 Appendix 12 1 12 1 Calculation of External Wiring Resistance 12 1 ...

Page 11: ...ble indication programmer manual 3 LADDER EDITOR FOR WINDOWS HLW PC3 Programming manual 4 LADDER EDITOR FOR DOS HL AT3E Programming manual NB981X NB982X NJI 206X NB335X 2 EH 150 APPLICATION MANUAL NJI 280X means revision of manual and up to A B C in order R e f e r e n c e What is Resistance Temperature Detective RTD This is also called as Resistance Thermometer Sensor Refers to the device measuri...

Page 12: ... as specified by the order 2 No damage is caused to the equipment during transport If any failures is found contact the sales office 3 The accessories listed in Table 1 2 are supplied T a b l e 1 2 P a c k a g e c o n t e n t s l i s t o f r e s i s t a n c e t e m p e r a t u r e d e t e c t i v e i n p u t m o d u l e N o C o n t e n t s Q u a n t i t y R e m a r k s 1 Resistance temperature det...

Page 13: ...ve 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 410 C at PT100 or 2500 ohm corresponding to about 410 ºC at PT1000 except when the l...

Page 14: ...ed or disconnected 4 Setting Switch This is used for setting of temperature range Refer chapter 6 Item Detailed explanation Remarks Operation explanation The module receives input signals from outside While 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 acco...

Page 15: ...een channels Non insulation External power supply 24V DC 10 100mA max Internal current consumption 5 V DC 200mA max External wiring resistance 400 ohm max channel External wiring Shielded wire Additional function Linearization Error detection 20 to 40 C Pt100 50 to 400 C Pt100 Pt1000 H7FFF is outputted at 25 C or less or at 45 C or higher H7FFF is outputted at 60 C or less or at 410 C or higher Pr...

Page 16: ... 7 b3 8 B3 9 24V DC 10 A0 11 NC 12 A1 13 NC 14 A2 15 NC 16 A3 17 NC 18 24V DC Note 1 Current terminals and a voltage terminals of unused channels should be wired By this wiring read data becomes H7FFF 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 PT100 IN EH PT4 RTD RTD A0 B0 b0 A3 B3 b3 Internal power circuit 24VDC 24VDC Internal current ...

Page 17: ...refers to the conversion of voltage V to frequency F RTD External grounding B0 b0 A3 B3 b3 External wiring CPU Bus 24 V DC External power 24V DC 24 V DC EH PT4 V F conversion Note Counter Timing control Input conversion circuit Constant current circuit Each part Switch circuit Internal Power Supply circuit A0 Line arize Shielded wire Photocoupler insulation RTD ...

Page 18: ...h 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 b0 B0 b1 B1 b2 B2 b3 B3 24V A0 NC A1 NC A2 NC A3 NC 24V External power supply 24VDC Groundi...

Page 19: ...1 Temperature rage setting Temperature measurement range Setting switch Pt100 20 to 40 C ON OFF Pt100 50 to 400 C ON OFF Pt1000 50 to 400 C ON OFF Note Do not use the setting which is not written in the table because the temperature data becomes undefined 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 Setting switch Switch 1 1 2 5 ON 3 6 ON 4 7 ON ...

Page 20: ...ment 2 I O allocation Depending on the module installation position the temperature conversion data is stored in the word input number shown below F i g u r e 7 1 The setting of n is determined by the module installation position as shown below Allocation address WX n Word number 0 to 3 Slot number 0 to 7 Unit number 0 to 1 F i g u r e 7 2 WX n0 1 2 3 Channel 1 temperature conversion data Channel ...

Page 21: ... error occurs below 51 C and over 410 C the temperature conversion data is H7FFF The following relation exits between temperature conversion data and actual temperature Temperature Note b0 is always 0 in normal time Relation between the temperature and temperature conversion data Figure 7 3 ａ Temperature conversion data hexadecimal 50 to 400 C H4000 H3000 H2000 H1000 H0800 50 0 50 100 200 300 400 ...

Page 22: ... over 45 C the temperature conversion data is H7FFF The following relation exits between temperature conversion data and actual temperature Temperature C Note b0 is always 0 in normal time Relation between the temperature and temperature conversion data Figure 7 4 b15 b14 b13 b12 b11 b10 b9 b8 b7 b5 b6 b4 b3 b2 b1 b0 C 80 40 20 10 5 2 5 1 25 0 625 0 3125 0 15625 0 78125 0 390625 0 1953125 0 097656...

Page 23: ...tioned 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 R0 is turned on 5 Turn to an absolute variable for plus temperature data use as it is and for minus temperature data remove the sign to turn it to a plus value Use WM0 because...

Page 24: ...83 17 0 0 0000 100 00 230 9421 24CC 186 82 5 205 00CC 101 95 240 9830 2666 190 45 10 410 0199 103 90 250 10240 2800 194 07 15 614 0266 105 85 260 10650 2999 197 69 20 819 0333 107 79 270 11059 2B33 201 29 25 1024 0400 109 73 280 11469 2CCC 204 88 30 1229 04CC 111 67 290 11878 2E66 208 45 35 1434 0599 113 61 300 12288 3000 212 02 40 1638 0666 115 54 310 12698 3199 215 57 45 1843 0733 117 47 320 131...

Page 25: ...6 D800 90 19 20 57344 E000 92 16 15 59392 E800 94 12 10 61440 F000 96 09 5 63488 F800 98 04 0 0 0000 100 00 5 2048 0800 101 95 10 4096 1000 103 90 15 6144 1800 105 85 20 8192 2000 107 79 25 10240 2800 109 73 30 12288 3000 111 67 35 14336 3800 113 61 40 16384 4000 115 54 45 18432 4800 117 47 Note 1 At the range from 20 to 40 ºC of Pt100 the input temperature input range is from 20 to 40 ºC But the ...

Page 26: ...s necessary to make a program externally for the treatment for an error Example of an error detection program Please take a proper countermeasure by using the coil Yb at error detection M8 ON Set the numbers of the sections a and b corresponding to the actual system M0008 Xa Yb Yb The program checks for error data When one error data is found M8 is turned on For error data Yb is turned on Xa is fo...

Page 27: ...ding on the situation WR000B H00CC WR0008 H00CC WR0009 H00CC R7E3 Every scanned data is read in and the data is stored in DR0 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 data is calculated If the difference between the previous data and read data is less than 5ºC put the read data i...

Page 28: ...erability e Secure a clearance of more than 50 mm between the upper and lower sections of the module for ventilation and maintenance For the right and left directions secure a clearance of more than 10 mm f Never pull out or insert a alive line of the module 9 2 M o u n t i n g M e t h o d 1 Checking a connector Before and after the installation check the following two points a Is there an abnorma...

Page 29: ...duits 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 Figure 9 2 Over current protection character 300 mm or more Output voltage Load current Power cable Other signal cables Wiring cable shielded wire of EH PT4 mo...

Page 30: ... error lamp on and starts cooler f When an error occurs the program stops a heater F i g u r e 1 0 1 E x t e r n a l d e v i c e 2 Configuration and allocation F i g u r e 1 0 2 P L C c o n f i g u r a t i o n Basic base Install EH PT4 on the fourth slot Use the relay output module installed on the slot 0 to output to the external device Y0 Motor Y1 Cooler Y2 Heater Y3 Motor error lamp Y4 Temperat...

Page 31: ... When the temperature at the lower part of the liquid is 50ºC or higher the program turns R4 on When the motor temperature is 100ºC or higher the program turns R2 on When the temperature difference is 8ºC or higher the program turns R0 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 an error is found the pro...

Page 32: ...oler Turn on M4 to light the data abnormality lamp Turn on any one of R1 R3 and R4 to light the temperature abnormality lamp Turn on any one of R1 R3 R4 R7 and M4 to turn on the cooler and turn off the heater When R2 is turned on the program turns the motor error lamp on R001 Y0003 1 M004 Y0004 1 Y0002 0 R003 Y0001 1 Y0005 1 Y0002 1 Y0004 0 ...

Page 33: ...t error Offset error Temperature conversion data 1 ºC H0028 or H002C 2 ºC H0050 or H0054 3 C H0078 or H007C 4 C H00A0 or H00A4 5 C H00CC or H00D0 c If offset error is on side toward the reference value subtract the value obtained in 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 th...

Page 34: ...e wiring is placed on 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 PT1000 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 11 3 Da...

Page 35: ...S For example for a cable whose cross section is 0 18 mm2 and length is 200 m the resistance is R 0 01854 200 0 18 20 6 Ω Because the current terminal of EH PT4 doubles in both ways the resistance also doubles 20 6 Ω 2 41 2 Ω 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 per 1 C is abo...

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