A/D converter module type A1S68AD User's Manual
Contents
1. 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 possible 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 FA Center may differ 4 Exclusion of chance loss and secondary loss from warranty liability Regardless of the gratis warranty term Mitsubishi shall not be liable for compensation to damages caused by any cause found not to be the responsibility of Mitsubishi chance losses lost profits incurred to the user by failures in Mitsubishi products damages and secondary damages caused from special reasons regardless of Mitsubishi s expectations compensation for accidents and compensation for damages to products other than Mitsubishi products and other duties 5 Changes in product specifications The specifications given in the catalogs manuals or technical documents are subject to chage without prior notice 6 Product application 1 In using the Mitsubishi MELSEC programmable logic 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 logic controller device and that backup and fail safe functions are sys2. 1 Separate AC and A1S68AD external input signal wiring that is not affected by a surge of alternating current and induction 2 Keep the external wiring at least 10 cm away from the main circuit high voltage wires and load carrying wires not originating from the PLC Otherwise the external wiring will be affected by noise surge or induc tion 3 Where applicable ground the shielding of all the wires to a common ground point 4 PRE OPERATION SETTINGS AND PROCEDURES MELSEC A 4 3 2 Connection example of module 1 Voltage input Signal source 0 to 10 V 2 Current input Signal source 0 to 20 mA 1 Shield 1 Use two core shielded wiring twisted 2 Indicates the input resistance of the A1S68AD For voltage input turn off the 250 Q resistor with the DIP switch 3 If either noise or ripple is generated by the external wiring connect a 0 1 to 0 47 uF 25V or more voltage resistance parts capacitor to the input terminal of the external device 4 AG is the GND terminal of the analog circuit Connecting it to the GND terminal of an external device is not mandatory but a higher level of accuracy may be obtained if it is con 10V 4 AG nected ov There is 10V input range for 3 channels or more and when the common tov for the external equipment that is connected to these channels is shared always connect the AG terminal and the shared common for the external AG ov equipment Refer to
3. JAPAN 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
4. X020 Y040 aa Reset write data error Read A D conversion completed flag area X021 X000 X001 ur Read digital output value of A D conversion com pleted channel rer remo 30 emo a Orr Ton en Do ec H Eier ion e To i MELSEC A Set the channel 1 2 and 3 to A D conversion enable Lo la 1 1 CH4 CH3 CH2 CHI Set the average count of channel 2 to 50 times Set the average time of channel 3 to 1000 ms Specify the channels 2 and 3 for average processing Set channel 2 to count and chan nel 3 to time X002 Fow one x 0 a re t 1 i 1 1 4 Frou iso vee Term MO one moo es mio Mi nous imo ver Ton Tr M2 Frowa mo ce 52 a Te e ea no ee oj CH CH CH CH CH CH CH CH 43 21 4321 Specify the Specify average count and tme processing Turn Y40 ON when a write data error occurs Read a write data error code to DO Output an error code to BCD indicator Turn Y12 ON and reset a writing data error when X20 is turned ON Read the A D conver sion completed flag to MO to M2 when X21 is turned ON Read the digital output value of the channel in which the A D conver sion completed flag is turned ON to D10 to D12 6 TROUBLESHOOTING 6 TROUBLESHOOTING Assorted problem conditions and a troubleshooting guide for the A1S68AD are described below 6 1 Error Code List When data is written to an A1
5. ms The first two 2 digits when the head O number is allocated to A1S68AD in three 3 digits of K H hexadecimal e Head address of the buffer memory in which data is stored op Head number of the device in which data is stored T c D W R When the A1S68AD is allocated to I O X130 to 14F and the Y130 to 14F the data is read from address 10 of the buffer memory to one 1 word DO _ The FROM instruction execu tion condition X 131 k HH Frome ms Kio oo e 2 Writing to A1S68AD TO TOP DTO and DTOP instruction The TO instruc tion execution A D conver condition sion READY H HH He ot Te Ts I HH The first two 2 digits when the head I O number is allocated to AIS68AD in three 3 digits of hexadecimal Head address of the buffer memory in which data KH is stored Number or constant of a head device in which F Number of words of write data KH The TO instruc tion execution condition X61 FH Hoe a BC RICH BGE 5 PROGRAMMING When A1S68AD is allocated to 1 O X60 to 7F and Y60 to 7F 1 is written in address 0 of a buffer memory 5 3 Initial Setting Program and Example of Digital Output Value Read Program This programming example is used to read the digital output value converted from an analog value with the condition that channels 1 to 3 are used Channel 1 is for the sample processing channel 2 is for the average process ing per 50 times and channel 3 is
6. Method of outputting a digital value of the sampling process and the averaging process a Sampling process An analog input value is converted to a digital value and the digital output value is stored in a buffer memory The storage time for a digital output value that the sampling process was executed on in the buffer memory depends on the number of A D conversion enabled channels Processing time number of A D conversion enabled channels x 0 5 ms Maximum conversion speed Example When channels 1 2 and 3 are set to conversion enable 3x0 5 1 5 ms b Averaging process A1S68AD executes the A D conversion for a channel that was specified for averaging process by a PLC CPU for the set number of times of set time The total values except a maximum value and a minimum value are averaged and the stored in the buffer memory However when the processing number of times is no more that two the sampling process is executed Data for averaging processing is initialized when the A D conversion setting is switched from enabled to disabled 1 When the averaging process by time is specified The setting time is set in ims unit The number of processing events within the preset time de pends on the number of channels for which A D conversion is enabled Processing time l Setting time number of A D conversion enabled channels x 1 ms Maximum conversion speed 3 SPECIFICATIONS Example When the number of times o
7. 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 precautiors etc given in the instruction manual user s manual and caution labels on the product 2 Even within the gratis warranty term repairs shali 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 When 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 correcily 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 not be the responsibility of Mitsubishi or the user 2 Onerous repair term after discontinuation of production
8. average time is completed and a flag is set to 1 after storing a digital value translated from an analog value in the buffer memory e When A D conversion enable is switched to disable The A D conversion completed flag of a corresponding channel is set to 0 3 There is an A D conversion completed flag classified by a channel b15tob8 b7 b6 b5 b4 b3 b2 bi bo A D Conversion completion flag 1 A D conversion completion Q A D conversion uncompletion 4 An A D conversion completed flag can be used as an interlock to read a digital value of a channel that the averaging process is done 4 PRE OPERATION SETTINGS AND PROCEDURES mn C 4 PRE OPERATION SETTINGS AND PROCEDURES 4 1 Handling Instructions The following explains the handling instructions for the A1S68AD 1 Since a case of the AIS68AD and its terminal block are made of resin do not let the module fall or give a strong 2 Do not remove the printed circuit boards from their housing Otherwise it may cause failnre 3 Make sure that no conductive debris can enter the module Make sure that any debris is removed from the module Guard particularly against cut off wires 4 Tighten the terminal screws and mounting screws as specified below Tightening Torque Range N cm Module fixing screw M4 screw 78 to 118 Terminal block installation screw M3 5 screw 59 to 88 Terminal block installation screw M4 screw 78 to 118 5 To install a
9. cuted 3 Specifying the average time and the average number of times a Average time or the average number of times is written in the address that corresponds to the channel of the buffer memory ad dresses 10 to 17 for every channel that the averaging process was specified Average time when a power supply is turned ON and the average number of times is set to 0 3 SPECIFICATIONS MELSEC A b The allowable setting range is as follows Averaging process specifying the number of times 1 to 20000 times Averaging process by specifying time 4 to 10000 ms When a value is set and written outside the above range a setting error occurs and the buffer memory is not rewritten The A1S68AD then completes the A D conversion processing accord ing to the average time and the number of times before a setting error occurs 3 7 4 Digital output value 1 Digitally converted values are stored for each channel in buffer memory addresses 20 to 27 The table below shows the digital output values for each input range 2 The digital output value 2000 to 4000 is expressed by 16 bit coded binary bi5 b14 b13 bi2 bii bt0 b9 b8 b7 b6 bd b4 b3 b2 bi b0 Data section 1 when b12 to b14 is negative b15 is 1 0 when positive b15 is 0 Negative digita value is expressed a compound of 2 Code bit 1 Negative 0 Positive 3 7 5 Writing data error code 1 The A1S68AD checks the preset range of the average time
10. devices YO to Y11 and Y13 to Y1F are used turned ON OFF in the sequence program the functions of the A1S68AD cannot be guaranteed XO x1 X2 X3 to If any of the devices YO to Y1F has the same number as any of the devices X0 to X1F then the device cannot be used as an internal relay 3 SPECIFICATIONS MELSEC A 3 6 2 I O signal functions The following table explains the function of each I O signal of A1S68AD Table 3 5 I O Signal Functions Device sas Ppi siama vesonpon mark While the error flag is set the A D conversion of the A1S68AD will not RUN WDT watch dog timer error flag This flag is set when the self diagnosis function of the A1S68AD detects a WDT error If the error flag XO is set hardware malfunction may occur A D conversion READY indicates the point in time when A D conversion has been completed once on all channels for which A D conversion is enabled and the digital output values have been stored in the buffer memory This signal is turned ON when the A D conversion is ready after turning on or resetting the CPU A D conversion READY spe e The A D conversion READY signal X1 can also be used as the buffer memory read write interlock This flag is set when an error other than the watch dog timer error occurs in the A1S68AD e If the error reset signal is set
11. for the average processing per 1000 ms When a writing error occurs an error code is displayed in BCD Sample condition of a program 1 System configuration Power supply module 2 Initial setting a A D conversion enabled channel 1 2 and 3 channels b Average processing channel by count Channel 2 count setting sasnecsauaasecescensesceateauentesscassaecenecaneessesdeneesaecscesaaceteesessauenaansesensspaeseaes 50 times c Average processing channel by time Channel 3 time setting sacsecaesceaesessenssscseseasescsscsesaesessaccacenesssesceucesceseeartaceceenonerenanenseonsaeasoes 1000 ms 3 Device to be used by user a Writing data error reset signal uumeesennenansenennenannnnnnnnnenonnennennsnnonsnn X20 b Digital output value read command input signal eee X21 c Writing data error occurrence display _ uucnenensnerennnsnenuonresnesnne Y40 d Writing data error code BOD output ueeeseseannansnnnersenene Y50 to 5B e Writing data error code storage data register eenssssnesseenneneen DO f A D conversion completed flag storage device MO to M2 g Digital output value read data register 0 cence D10 to D12 5 PROGRAMMING Programming procedure X000 X001 Theintial setting such as A D conversion en able disable and the specification average processing Processing when a writedata error occurs
12. i0 to O to 10 V Input resistance 1 MQ Can be selected by setting Current 0 to 20 mA Input resistance 250 Q DIP switches Digital output Signd 16 binary Analog input Digital output og gr Oto 10 V 0 to 4000 I O characteristics 1 10 to 10 V 2000 to 2000 0 to 5V or O to 20 mA O to 4000 1 to 5V or 4 to 20mA 0 to 4000 Analog input Digital output Oto 10 V 10 to 10V 0t05V 1105V O to 20 mA 4 to 20 mA ET scale 1 0 Digital output value 40 Maximum Maximum resolution Input Current 3 30 mA Applicable wire size 0 75 to 1 5 mm Applicable solderless _ R1 25 3 1 25 YS3 RAV1 25 3 V1 25 YS3A Internal current 0 4 A consumption 5 V DC The switch is set to the analog input value 0 to 10 V on delivery 2 The maximum conversion speed is 1 ms channel on all channels if averaging processing is set even for only one channel The available analog input range for the overall accuracy is as follows Voltage 10t0 0 to 10 V Current 0 to 20 mA 3 SPECIFICATIONS TT TTT E O ECA 3 3 I O Conversion Characteristics The I O conversion characteristic is the gradient observed when analog signals voltage or current input sent from a source external to the PLC are converted into digital values 3 SPECIFICATIONS 3 3 1 Voltage input characteristics Figure 3 1 is a graph showing an example of the voltage input characteristic after th
13. or re tightening terminal screws Carrying out this work while the power is ON will cause failure or malfunction of the module Do not disassemble or modify any module This will cause failure malfunction injuries or fire Switch the power OFF before mounting or removing the module Mounting or removing it with the power ON can cause failure or malfunction of the module Inputting a voltage input in a current input range may cause failure Cautions on Disposal N CAUTION Dispose of this product as industrial waste REVISIONS The manual number is given on the bottom left of the back cover Print Date Manual Number Sep 1995 IB NA 66576 A First edition WARRANTY SAFETY PRECAUTIONS Chapter 2 Section 3 1 3 2 3 3 3 3 1 3 3 2 3 3 3 3 4 3 7 3 7 4 4 1 4 2 4 3 2 5 1 5 2 5 3 Apr 2001 IB NA 66576 B Japanese Manual Version SH 3537 C INTRODUCTION Thank you for choosing the Mitsubishi MELSEC A Series of General Purpose Programmable Control lers 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 INTRODUCTION 22u nnenonenensononeu neuen en nnenen nn nenn n nennen nenn 1 1 1 1 Features 2 0 ccc cece ee ten cence eter nee nennen 1 1 SYSTEM CONFIGURATIONS 0 cece cece t cece cece nn nenn nun ernennen nen 2 1 SPECIFICATIONS 0 cece e cect e eee eee n eet
14. read 6 eee cee ee 6 2 APPENDICES o2eeenarnunnununnn nun nun nennen nennen nn APP 1 APP 2 APPENDIX 1 COMPARISON OF PERFORMANCE BETWEEN A1S68AD AND AiS64AD cece eee nee eee e eens APP 1 APPENDIX 2 OUTSIDE DIMENSIONS cc cece eet eee ene eeeaes APP 2 INTRODUCTION 1 INTRODUCTION This manual describes specifications handling programming and other infor mation on the AiS68AD analog to digital converter module referred to as A1S68AD for use with a MELSEC A series AISCPU module hereafter called the PLC CPU i A1S68AD is used to convert an analog signal voltage or current input from an external device of a PLC into a digital value signed 16 bit BIN data PLC CPU Initial setting such as A1S68AD EEE eee seg Input terminal Otoz10Vor output Setdata data 0 to 20 mA device Digital value read 0 to 10 Vor otosta mA TO instruction Digital value j FROM instruction Digital value Analog digi tal conversion device 1 1 Features AiS68AD has the following features 1 Allows analog to digital conversion for 8 channels A D conversion of 8 channels is enabled with an A1S68AD Voltage input and current input can be selected for each channel by using DIP switches 2 Allows selection of the processing method for each channel One of the following processing methods can be selected for each channel a Sampling processing method whereby digital va
15. supply Applicable wire size 0 75 to 1 5mm Applicable solderless terminal Internal current consumption 5VDC 0 31 A Weight kg Ib 0 27 0 59 0 25 0 55 j Insulation method R1 25 3 1 25 YS3 RAV1 25 3 V1 25 YS3A APP 1 APPENDICES MELSEC A APPENDIX 2 OUTSIDE DIMENSION A1tS68AD RUN 2 S 2 o s2 of 5 ap ep sp ap js ef EEE ef sf o A a CE of ef FL 34 5 0 14 Unit mm inch APP 2 WARRANTY Please confirm the following product warranty details before starting use 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 gratis warranty term the product shall be repaired at no cast via the dealer or Mitsubishi Service Company Note that if repairs are required at a site overseas on a detached island or remote place expenses to dispatch an engineer shall be charged for Gratis Warranty Term The gratis warranty term of the product shall be for one year after the date of purchase or delivery to a designated place Note that after manufacture and shipment from Mitsubishi the maximum distribution period shali 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
16. the module Please contact your local Mitsubishi service representative Is XO WDT error set 6 2 3 When the digital output value cannot be read Is the RUN LED of A1S68AD flashing or turned OFF Follow the procedures in Section 6 2 1 or 6 2 2 Check the error description according to the CPU Is the ERROR LED of the GPU is turned ON User s Manual Is the RUN LED of the CPU flashing or turned OFF check the error description listed in the GPU User s Monitor with a peripheral device such as GPP and Is the condition to execute FROM instruction turned ON confirm whether it is ON or OFF Does the address of the buffer memory specified with a FROM instruction correspond to the address of the digital output value of channel to be read Is the channel specified with FROM instruction set to Read the buffer memory address 0 and verify whether it A D conversion enable is set to conversion enable or disable Is the conversion completed in the channel specified Read the buffer memory address 28 and verify the with FROM instruction conversion completed flag Is the analog input signal line disconnected or does an Confirm the error by visually checking or conduction error occur checking the signal line Disconnect the analog input wire of A1S68AD and apply the test voltage Stabilized power supply or battery to the terminal of this module to measure the digital output value Check the sequence program
17. writing to the buffer memory is delayed until the FROM TO processing is completed If the time it takes for the switching channel overlaps with the execution of FROM TO processing the switching channel is delayed until the FROM TO processing is completed When a digital value that has been converted from an analog value is being written to the buffer memory with the switching channel the FROM TO processing is delayed until the writing or switching channel is completed Designate the FROM TO instruction to read and write a lot of data at one time The smaller the number of FROM TO instructions the less the maximum conversion speed is influenced 3 SPECIFICATIONS 3 6 CPU I O Signals This section explains the allocation of the I O signals and the function of each signal 3 6 1 Overview of I O signals The A1S68AD uses 32 signal points for input and output Table 3 4 gives the allocation and description of the O signals X devices refer to the input signals from the A1S68AD to the PLC CPU Y devices refer to output signals from the PLC CPU to the A1S68AD The device numbers input signals shown in the table are used when the A1S68AD is loaded into slot 0 of the main base unit Table 3 4 I O Signals Signal Direction A1S68AD PC CPU Signal Direction PC CPU gt A1S68AD Device No Signal Description Signal Description WDT error flag Yo to Unusable A D conversion READY Y11 Y13 Unusable to Unusable YIF If any of the
18. If the digital output value is normal with an A1S68AD the module is affected by noise with external wiring Therefore check the wiring and grounding method DICE APPENDICES MELSEC A APPENDICES APPENDIX 1 COMPARISON OF PERFORMACE BETWEEN A1S68AD AND A1S64AD Table APP 1 Comparison of Performance Specification AIS68AD AIS64AD Voltage Voltage 0 to 10 VDC input resistance 1Mn O to 10 VDC input resistance 1 MQ Analog input Current Current i 0 to 20 mA input resistance 250 0 to 20 mA input resistance 250 Q Can be selected by setting DIP switches Can be selected by using inputterminals Digital output 16 bit signed binary Digital Output Value Gain 5 VResolution 1 12000 Digital Output Analog Input Value Value Input Analog Input Value Range 10 to 10 V I O characteristic 12000 6000 0 6000 12000 i 0 83 mV Voltage input 1 my Voltage input resolution 1 12000 Maximum resolution 3 33 pA Current input 4 nA input range Current input resolution mA 1 12000 Overall accuracy Within 1 accuracy with respect to the maximum value Maximum _ conversion speed 0 5 ms channel 20 ms channel Number of analog IVO points 8 channels module 4 channels module Between input terminal and PC power supply Photocoupler insulation Between channels No insulation Number of occupied A I O points Special 32 points Connection terminal 20 terminal block External power
19. MITSUBISHI A D converter module type A1S68AD User s Manual Mell Stell Mitsubishi Programmable Controller SAFETY PRECAUTIONS You must read these cautions before using the product In connection with the use of this product in addition to carefully reading both this manual and the related manuals indicated in this manual it is also essential to pay due attention to safety and handle the product correctly The instructions given in this manual are conccrned with this product Refer to User s Manual of the CPU module in Use for details on the safety instrutions for the programmable logic controller system These SAFETY CAUTIONS are classified into two grades DANGER and CAUTION Safety caution given when incorrect handling could result in hazardous DANGER situations involving the possibility of death or serious injury Safety caution given when incorrect handling could result in hazardous CAUTION situations involving the possibility of moderate or light injury or damage to property Note that depending on the circumstances failing to follow a AN caution may also have very serious consequences Both of these classes of safety caution are very important and must be observed Store this manual carefully in a place where it is accessible for reference whenever necessary and forward a copy of the manual to the end user Cautions on Design Do not bun
20. S68AD from a PLC CPU or an error occurs by reading data RUN LED of A1S68AD flashes the following error codes are stored in address 1of the A1S68AD buffer memory Table 6 1 Error Code List Detected with A1S68AD Data was written to the read only Modify the specified place for area the read only area poe e A value outside 4 to 10000 ms was set for the average time 1 When several errors occur the error code that occurred first is stored and any errors after that are not stored Set the average time within 4 to 10000 ms e indicates the channel No in which an error occurred e A value outside 1 to 20000 times was set for the average count Set the average count within 1 to 20000 times indicates the channel No in which an error occurred 2 The error code is reset by turning ON Y12 with a sequence program See Section 3 6 6 TROUBLESHOOTING 6 2 Troubleshooting The following explains the simple troubleshooting for A1S68AD Refer to the CPU Module User s Manual for a PLC CPU module 6 2 1 When the RUN LED of A1S68AD Flashes Is the data which cannot be executed read write written Confirm the error cause with the error code list in to AiS68AD Section 6 1 and correct the sequence program 6 2 2 When the RUN LED of A1S68AD goes OFF Reset the PLC CPU If the RUN LED is not turned ON after resetting a PLC CPU there may be a hardware malfunction in
21. ate a digital output value exceeding the maximum 4000 or minimum 0 digital output value set for the input range the digital output value is fixed at the maximum 4000 or minimum 0 digital value set for the input range 3 SPECIFICATIONS 3 3 3 Overall accuracy The overall accuracy is the accuracy with respect to the full scale digital output value Even if the input range setting is changed and the I O characteristic varies accordingly the overall accuracy does not change and remains within the range specified in the Performance Specifications table Input range 10 to 10 V 1 40 Digital output 0 value 0 Analog input voltage V Fig 3 3 Overall Accuracy of the Voltage Input Characteristics Input range 0 to 20 mA 1 40 Digital output 0 value Analog input current mA Fig 3 4 Overall Accuracy of the Current Input Characteristics 3 SPECIFICATIONS MELSEC A 34 Functions List Table 3 3 shows the functions of ATS68AD Table 3 3 AiS68AD Functions List en pn Tran e A D conversion enable disable is specified for each A D channel conversion Default All channels are set to enable enable disable setting e Sampling time can be shortened by switching the unused channel to disable Input range The input range can be set for each channel and Section 3 3 setting the I O conversion characteristic can be changed Section 4 2 e A D conversion is don
22. ations Table 3 1 shows the general specifications of the A1S68AD Table 3 1 General Specifications Er waar coy a When there is 10 to 57 Hz 0 075 mm 9 8m S Conforming Intermittent 57 10 1504 10 times i f to JIS B vibration o z each in X Y Vibration resistance 3501 IEC each in X 61132 2 When there ig 101057 Hz 80 minutes continuous vibration 57 to 150 Hz 4 9m S Shock resistance Conforming to JIS B3501 IEC 61132 2 147m S 3 times each in 3 directions Operating environment No corrosive gas present Operating height 2000 m 6562 it or less Installation area On the control board 1 Indicates the distribution area where the device is assumed to be connected from the public power distribution network to the local machine device Category Il is applied to the devices to which the power is supplied from a fixed equipment The surge resistace voltage of a rated 300 V device is 2500 V 2 This is an index which Indicates the occurrence rate of the conductive object in the anvironment where the device is used Pollution rate I indicates that only non conductive pollution may occur with a possibllity of generating temporary conductivity due to accidental condensation 3 SPECIFICATIONS 3 2 Performance Specifications Table 3 2 shows the performance specifications of the A1S68AD Table 3 2 Performance Specifications a Analog input Voltage DC
23. ber of enable channels Conversion speed of one channel 1 Method of setting the conversion enable disable Set ihe conversion enable disable for every channel bi5tob8 b7 ignored Specify channels 1 A D conversion enable 0 A D conversion disable 2 Processing in the A1S68AD when setting conversion enabled disabled a Processing when the A D conversion setting is switched from dis abled to enabled After the A D conversion READY flag X1 has been reset sampling of the enabled channels begins The A D conversion READY fiag and the A D conversion completed flag for the corresponding chan nels are set as soon as one cycle of sampling processing averaging processing is completed Valid digital output values are stored in the buffer memory just before these flags are set 3 SPECIFICATIONS b Processing when the A D conversion setting is switched from en abled to disabled When averaging processing is specified all data within the work area for averaging processing is initialized This means that processing will start from the first sampling when conversion enabled is specified for the next averaging processing Although the A D conversion completed flag for the corresponding channels is reset immediately the A D conversion READY flag remains unchanged The buffer memory retains the digital output values before conver sion disabled was specified 3 7 3 Setting of the sampling process averaging process 1
24. die control lines or communication wires together with main circuit or power lines or lay them close to these lines As a guide separate the lines by a distance of at least 100 mm otherwise malfunctions may occur due to noise Cautions on Mounting Use the PLC in an environment that conforms to the general specifications in the manual Using the PLC in environments outside the ranges stated in the general specifications will cause electric shock fire malfunction or damage to deterioration of the product Make sure that the module fixing projection on the base of the module is properly engaged in the module fixing hole in the base unit before mounting the module Failure to mount the module properly will result in malfunction or failure or in the module falling Cautions on Wiring e 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 fire or malfunctions Make sure that no foreign matter such as chips or wiring offcuts gets inside the module It will cause fire failure or malfunction Cautions on Startup and Maintenance Do not touch terminals while the power is ON This will cause malfunctions Switch the power off before cleaning
25. e count 14 CH5 Average time count 15 CH6 Average time count 16 CH7 Average time count 17 GH8 Average time count 18 Unusable 19 20 GH1 Average time count 21 CH2 Average time count 22 CH3 Average time count 23 CH4 Average time count 24 CH5 Average time count 25 CH6 Average time count 26 CH7 Average time count 27 CH8 Average time count 28 A D conversion completed flag 29 Unusable Fig 3 6 Buffer Memory Assignment 3 11 3 SP ICATION SPECIFICATIONS MELSEC A Do not write values from the PLC CPU to any write enabled area in the buffer memory It will result in an error unless the written values are identical The RUN LED of the A1S68AD will flash the error flag X2 will be set and an error code which indicates that a value has been written to a write enabled area will be stored in the error code area in the buffer mamory in such a case the A1S68AD will write the original data over the written data and continue processing 3 7 2 Setting of A D conversion enable disable A D conversion enable disable for each channel of AiS68AD can be set at address 0 of the buffer memory by writing 1 enable or 0 disable by the channel The sampling period can be shortened by setting an unused channel to conversion disable Default All channels A D conversion enabled Example Sampling period when setting only channels 1 and 3 to A D conversion enable 2 x 0 5 ms ims Num
26. e cnet et eneencenerens 3 1 3 16 3 1 General Specifications anaa Laa LLADD LLa aarne aaaea 3 1 3 2 Performance Specifications 0 ccc cee eet ec cece nee teen eaters 3 2 3 3 WO Conversion Characteristics 0 0 0 cece cee cee cence nen en nenn 3 3 3 3 1 Voltage input characteristics 0 0 0 cee eee eee eens 3 4 3 3 2 Current input characteristics 2 0 0 0 cee ree eee een nenn 3 5 3 3 3 Overall accuracy 0 icc c cece etc cee etree tee tee ee enennes 3 6 3 4 Functions List 0 ccc ec cee cee ee tenet eneeed eee eee eee 3 7 3 5 Maximum Conversion Speed 2 cc cece cece tee eee eee eee nennen 3 8 3 5 1 Conversion speed for one channel 00 cc cee cere eee eens 3 8 3 5 2 Influence on the maximum conversion speed by executing the FROM TO instruction 0 6 c cece cence e eee cent tees 3 8 3 6 CPUWOSignals 00 ccc cece eee eee eee eee errereen 3 9 3 6 1 Overview of VO signals 0 0 ccc cee eeeee eter ernennen 3 9 3 6 2 VO signal functions 0 ccc eee eect eee eens 97 10 3 7 Buffer Memory 0 ccc cece ee te eee ence reece eden eee nenne 3 11 3 7 1 Buffer memory assignment 00 ccc cece cece nern rn 3 11 3 7 2 Setting of A D conversion enable disable 00 cece eee eee cee 3 12 3 7 3 Setting of the sampling process averaging process 00000 3 13 3 74 Digital output value 2 02 cece eee te eee eee nen
27. e for the each channel with a Averaging setting count or setting time The averaging process process is done for the A D conversion data and Section 3 7 3 specification the average is set to the buffer memory as the digital output value Section 3 7 2 Sampling Analog input value is converted to the digital value process for each channel and is stored in the buffer Section 3 7 3 specification memory as the digital output value 3 SPECIFICATIONS MELSEC A 35 Maximum Conversion Speed Conversion speed is the time it takes when a digital value is written to the buffer memory after the A D conversion by switching channel The following explains the maximum conversion speed 3 5 1 Conversion speed for one channel Conversion speed for one channel of A1S68AD is 0 5 ms When several channels are used 0 5 ms x the number of conversion enabled chan nels equals the sampling time The conversion speed is 1 ms channel on all channels if averaging processing is selected even for only one channel 3 5 2 Influence on the maximum conversion speed by executing the FROM TO instruction When the FROM TO instruction is not executed the maximum conversion spee dis as mentioned above Executing the FROM TO instruction influences the maximum conversion speed as follows 1 2 3 4 If the time it takes to write a digital value converted from an analog value overlaps with the execution of FROM TO processing
28. e input range setting has been changed When the input range setting isO to 10 V Practical analog input range Setting example Digital ouput 2000 Input range value O to 10 V 0 Analog input voltage V Digital Output Value at Digital Output Value at Input Range 3 V Analog Input 7V eo Input Fig 3 1 Voltage Input Characteristics 1 Do not input voltage 35 V or more Otherwise elements may be broken 2 In the case of an analog input value which on conversion will generate a digital output value exceeding the maximum 2000 4000 or minimum 2000 0 digital output value set for the input range the digital output value is fixed at the maximum 2000 4000 or minimum 2000 0 digital value set for the input range 3 SPECIFICATIONS 3 3 2 Current input characteristics Figure 3 2 is a graph showing an example of the voltage input characteristic after the input range setting has been changed When the input range setting is 0 to 20 mA Practical analog input range Setting example Digital 2000 Input range output value O to 20 mA 0 Analog input current mA Digital Output Value at Digital Output Value at Input Range 5 mA Analog Input 10 mA Analog Input sam m m Fig 3 2 Volage Input Characteristics 1 Do not input a voltage 30 mA or more Otherwise a high tempera ture will occur and cause a problem 2 In the case of an analog input value which on conversion will gener
29. f A D conversion enabled channels is 4 and the setting time is 8000 msec 8000 4x 1 2000 time 2 When the number of times for the averaging process is specified The time in which the average is stored to the buffer memory follows the number of A D conversion enabled channels Processing time the setting number of times x A D conversion enabled channel x 1 ms Maximum conversion speed Example When example channels 1 2 3 and 4 are set to A D conversion enable and the setting number of times is set to 50 times 50 x 4x 1 200 ms 2 Specifying the averaging process and selecting time number of times a When the power supply is turned ON and the A1S68AD A D conver sion READY signal turns ON all of the channels are specified for the sampling process b When sampling processing or averaging processing is specified and to perform averaging processing specify the average time or aver age count b15 b14 b13 b12 bil bid b9 b8 b7 be b5 b4 b3 b2 b1 bo 1 Specify the channel in which the averaging Specify the time number of process is to be executed times 1 Averaging prosess 1 Time averaging process 0 Sampling process 0 Number of times 1 When the averaging process is specified the number of times or time for the averaging process should be set beforehand 2 When the averaging process is not specified despite the specifica tion of the time number of times sample processing will be exe
30. figure below 10V 10V AG OV AG terminal 5 PROGRAMMING 4 4 Check and Maintenance For ideal running conditions follow the check items described in the CPU module User s Manual 5 PROGRAMMING This section explains the programming procedure a basic program and a read write programming example when using the A1S68AD See to Section 3 7 for the buffer memory and the ACPU Programming Manual for the programming instruction details 51 Programming Procedure When creating a program to execute the A D conversion of A1S68AD use the following procedure Set the A D conversion enable disable Initial setting Set the average time or average count Specify the average processing Specify the sample processing Read the digital output value During each of the processes of the special function module access from the PLC CPU will have priority Accordingly if frequent access to the buffer memory of the special function module made from the PLC CPU it will not only extend the scan time of the PLC CPU delays in each of the processes of the special function module will occur Only use the FROM TO and other such commands to access the buffer memory from the PLC CPU when necessary 5 PROGRAMMING MELSEC A 5 2 Basic Program for Read Write 1 Read from A1S68AD FROM FROMP DFRO and DFROP instruction The FROM instruction execu A D conver tion condition sion READY rromp m n o
31. lues are stored one by one in the buffer memory after each A D conversion b Averaging processing method whereby A D conversion is performed the preset number of times or for the preset duration and the mean value of the converted values is stored in the buffer memory as a digital value 3 Allows conversion of the enable disable setting Every channel The A D conversion of the enable disable setting can be set for every channel The conversion speed can then be shortened by setting an unused channel to conversion disable 4 Allows selection of the input range by using DIP switches for each channel The input range can be selected for each channel by using DIP switches The module has an automatic offset compensation function making offset gain adjustment unnecessary 5 Allows high speed A D conversion A D conversion can be performed at a speed of 0 5 ms per channel 2 SYSTEM CONFIGURATIONS 2 SYSTEM CONFIGURATIONS 1 Applicable GPU e AISCPU S1 A1SJCPU S3 AISCPUC24 R2 gt A2SCPU S1 e A2ZASCPU S1 S30 AISHCPU A1SJHCPU S8 A2SHCPU S1 e AZUSHCPU S1 A52GCPU Q2ASCPU S1 Q2ASHCPU S1 2 Loadable number of AiS68ADs Any number of A1S68ADs can be loaded provided the number of I O points of the applicable PLC CPU is not exceeded 3 Loading siot Except in the following cases an ATS68AD can be loaded in any slot of a base unit if an A1S68AD is installed on an extension base unit without a powe
32. module to the base unit insert the module fixing hook into the module fixing hole on the base unit and tighten the module fixing screw To remove a module loosen the module fixing screw and pull the module fixing hook out of the module fixing hole Module fixing screw Base unit N EB Module connec Module c tor KL Module fixing hook 4 PRE OPERATION SETTI E NGS AND PROCEDURES MELSEC A 4 2 Names and settings of each section The following gives the Names and settings of each section for each part of the A1S68AD A1S68AD Wo Name and Appearance Description oo RUN LED Displays the operation status of the AiS68AD Normal operation RUN lt Write disabled error or average time count setting error 5 V power cut or watchdog timer error Input range selector Used to set the input range for each channel switch SW1 The DIP switch numbers 1 to 8 correspond to the channel numbers SW1 to SW3 Setting of CH1 seme Te Pos Ta one om env Da nes om en a nam or omas on Set CH2 to CH8 in the same manner Caution Applying a voltage input when a current input range is selected may cause a failure 4 2 4 PRE OPERATION SETTINGS AND PROCEDURES 43 Wiring This section explanins the wiring instrutions and gives a connection example of a module 4 3 1 Wiring instructions Protect the external wiring against noise extraneous signals with the follow ing precautions
33. nen 3 15 3 7 5 Writing data error code 2 0 eee ccc eee eee nee 3 15 3 7 6 A D conversion completed flag 0 cece cece ce eet nenne nn 3 16 PRE OPERATION SETTINGS AND PROCEDURES sunsnesneraonnenen 4 1 4 4 4 1 Handling Instructions 22s0esenenereenensneneren nenne nennen nee 4 1 4 2 Names and settings of each section 0 cece cece eee eee e ee enee 4 2 43 Wiring cee ee ee ee eee eee erence eect ence ener nees 4 3 4 3 1 Wiring instructions 2 6 cece eee tee ences 4 3 43 2 Connection example of module n22eeeerneneeeen eee ed 4 4 44 Check and Maintenance 0 cece eee eee cee eee eect ence enn en en 4 4 PROGRAMMING cc cece eee ccc cence tree ere e n nennen nn srnen nenn 5 1 5 4 5 1 Programming Procedure 0 2 ccc cee ee reece tenet e eee e nenne 5 1 5 2 Basic Program for Read Write 6 ccc cece cence teen eet e nenne ents 5 2 53 Initial Setting Program and Example of Digital Output Value Read Program 5 3 TROUBLESHOOTING 0c cece eect cece cree nenn nenn nen See eeneee 6 1 6 2 6 1 Error Code List 2 0 0 0 0c ee ce eee eee tence ence ee eee eaten 6 1 6 2 Troubleshooting 0 2 ccc cece eee een eet e tense es rennen nn 6 2 6 2 1 When the RUN LED of AIS68AD Flashes 0 cece ee eee eee 6 2 6 2 2 When the RUN LED of AIS68AD goes OFF 0 0 0e eee 6 2 6 2 3 When the digital output value cannot be
34. of count written from the PLC CPU and whether data has been written to a write disabled area 3 SPECIFICATIONS 3 7 6 if the setting is out of the range or data is written to a write disabled area the error flag X2 will be set and the corresponding error code will be stored as a 16 bit binary value at buffer memory address 1 In such a case the A1S68AD will write the original data over the written data and continue processing For details of error codes refer to Section 6 1 2 When several errors occur the error code that occurred at first is stored in AIS68AD and any errors after that are not stored 3 The error code is reset by turning ON Y12 with a sequence program 4 When the error is reset the error flag X2 will be reset and the error code stored in the buffer memory will be cleared to 0 At the same time the RUN LED will stop flashing and come on A D conversion completed flag 1 When after turning ON a power supply and an A D conversion READY signal X1 turns ON channels 1 to 8 have already completed all of the A D conversion Therefore 00FF is stored in the buffer memory 2 Only when the A D conversion enable disable setting address 0 is changed the A D conversion completed flag processing after turning on a power supply is done one time e When A D conversion disable is switched to enable When the averaging processing is specified the averaging process for the average number of times or
35. r supply unit A1S52B S1 A1S55B S1 or A1S58B S1 the power ca pacity may be insufficient If such installation is unavoidable select a proper power supply unit main and extension base units and extension cable taking the following factors into consideration a the capacity of the power supply unit on the main base unit b voltage drop in the main base unit c voltage drop in the extension base unit and d voltage drop in the extension cable 4 Data link system The A1S68AD can be loaded at any of the master local and remote I O stations of a data link system For examples of remote I O station programs refer to the MELSECNET and MELSECNET B Data Link System Reference Manuals For VO point ranges and calculation of voltage drop refer to the following manuals e AISJCPU S3 User s Manual gt 2 s esse cece cece eet cece eeees IB NA 66446 e A1S A1SC24 R2 A2SCPU S1 User s Manual rennen IB NA 66320 A2ASCPU S1 S30 User s Manual een nennen IB NA 66455 A2USHCPU S1 User s Manual ss ese re tere ernennen en nn nn IB NA 66789 e AISIH SSYATSH A2SHCPU ST User s Manuals rue nene IB NA 66779 Q2AS H CPU S1 User s Manual esses cere reece eee reece nn SH NA 3599 3 SPECIFICATIONS 3 SPECIFICATIONS This chapter describes the general specifications performance specifica tions VO conversion characteristics and buffer memory spesifications of the A1S68AD 3 1 General Specific
36. tematically provided outside of the device for any problem or fault 2 The Mitsubishi general purpose programmable logic 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 each Japan Railways company or the Department of Defense shall be excluded from the programmable logic controller applications Note that even with these applications if the user approves that the application is to be limited and a special quality is not required application shall be possible When considering use in aircraft medical applications railways incineration and fuel devices manned transport devices equipment for recreation and amusement and safety devices in which human life or assets could be greatly affected and for which a particularly high reliability is required fin terms of safety and control system please consult with Mitsubishi and discuss the required specifications A D converter module type A1S68AD User s Manual MODEL A1S68AD U E MODEL 13J757 IB NA 66576 B 0104 MEE sa MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE MITSUBISHI DENKI BLDG MARUNOUCHI TOKYO 100 8310 TELEX J24532 CABLE MELCO TOKYO NAGOYA WORKS 1 14 YADA MINAMI 5 HIGASHI KU NAGOYA
37. the error code is stored in the error code storage area If the error reset signal is turned ON this error flag is reset Turning ON the error reset signal resets the error flag and clears the check code of the buffer memory Itis replaced by 0 Set Reset Error flag by the sys X2 tem Set Re set by the se quence program Error reset signal Y12 Buffer memory addresse s1 e The RUN LED on the front of the module is switched to ON normal operation from flashing error X Error code 3 SPECIFICATIONS 3 7 Buffer Memory The A1S68AD has a buffer memory not battery backed for data communi cation with the CPU The buffer memory assignment and data maps are indicated below 3 7 1 Buffer memory assignment The following figure shows the buffer memory assignment OOFFH All channels are set to set to ennable Enabled Enabled Section3 7 2 O All channels Enabled Disabled Section3 7 5 O sampling processing specified Enabled Enabled Section3 7 3 for all channels BE 7 u E Enabled Enabled Section3 7 3 Enabled Disabled Section3 7 4 Enabled Enabled Section3 7 6 Address Decimal A D conversion enable disable Writing data error code Average processing specification Unusable 10 CH1 Average time count 11 CH2 Averags time count 12 CH3 Average time count 13 CH4 Average tim
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