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SMA1

5.5 Recommended SSI circuit

MAN SMA1 E 2.9.odt

5 - SSI interface

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Содержание MTA1

Страница 1: ...he following models SMA1 GA2 SMA1 SB1 SMA1 SB2 SMA1 SC1 SMA1 SC2 Table of Contents Preliminary information 8 1 Safety summary 9 2 Identification 10 3 Mounting instructions 11 4 Electrical connections 14 5 SSI interface 16 6 BiSS B mode interface 20 7 BiSS C mode interface 31 8 1Vpp sine cosine output signals 42 9 Error and fault diagnostics 43 Lika Electronic Tel 39 0445 806600 info lika biz www l...

Страница 2: ...ion herein is subject to change without notice and should not be construed as a commitment by Lika Electronic s r l Lika Electronic s r l reserves the right to make all modifications at any moments and without forewarning This manual is periodically reviewed and revised As required we suggest checking if a new or updated edition of this document is available at Lika Electronic s r l s website Lika...

Страница 3: ...ection 15 4 4 1Vpp sinusoidal output signals 15 4 5 Diagnostic LED 15 4 6 Features summary 15 5 SSI interface 16 5 1 SSI Synchronous Serial Interface 16 5 2 LSB right aligned protocol 17 5 3 Recommended transmission rates 18 5 4 Helpful information 18 5 5 Recommended SSI circuit 19 6 BiSS B mode interface 20 6 1 XML file 20 6 2 Communication 20 6 3 Register Mode 20 Register address 20 DATA 21 CRC ...

Страница 4: ...mode interface 31 7 1 XML file 31 7 2 Communication 31 7 3 Single Cycle Data 32 Position 32 Error 32 Warning 32 CRC 33 7 4 Control Data CD 33 Register address 33 RW 33 DATA 33 CRC 34 7 5 Used registers 34 Profile ID 35 Serial number 35 Command 35 Normal operation 35 Save parameters on EEPROM 35 Save and activate Preset Offset 35 Load and save default parameters 35 Configuration 36 Set preset offse...

Страница 5: ...Setting the Preset Offset register 41 7 8 Recommended BiSS circuit 41 8 1Vpp sine cosine output signals 42 8 1 Output signals voltage level 42 9 Error and fault diagnostics 43 9 1 Diagnostic LED 43 10 Maintenance 44 11 Troubleshooting 45 12 Default parameters list 46 ...

Страница 6: ...et offset 25 36 L Load and save default parameters 24 35 M Manufacturer ID 29 40 N Normal operation 24 35 O Offset 27 38 Output code 26 37 P Preset 27 38 Preset Offset 27 38 Profile ID 23 35 S Save and activate Preset Offset 24 35 Save parameters on EEPROM 24 35 Select BiSS SSI 25 Serial number 24 35 Set preset offset 25 36 SINE COSINE resolution 28 39 ...

Страница 7: ...ant to highlight the parts of the text where information of great significance for the user can be found user must pay the greatest attention to them Instructions must be followed strictly in order to guarantee the safety of the user and a correct use of the device Failure to heed a warning or comply with instructions could lead to personal injury and or damage to the unit or other equipment This ...

Страница 8: ...back It is mandatory to pair the sensor with the MTA1 type magnetic tape To make it easier to read and understand the text this guide can be divided into five main sections In the first section some general information concerning the safety the mechanical installation and the electrical connection as well as tips for setting up and running properly and efficiently the unit are provided In the seco...

Страница 9: ...e explanation in the 4 Electrical connections section on page 14 the wires of unused signals must be cut at different lengths and insulated singularly in compliance with 2014 30 UE norm on electromagnetic compatibility following precautions must be taken before handling and installing the equipment discharge electrical charge from your body and tools which may come in touch with the device power s...

Страница 10: ... that adequate cleaning measures as for instance brushes scrapers jets of compressed air etc are in place in order to prevent the sensor and the magnetic scale from jamming 2 Identification Device can be identified through the order code and the serial number printed on the label applied to its body Information is listed in the delivery document too Please always quote the order code and the seria...

Страница 11: ...ssible please make sure that adequate cleaning measures as for instance brushes scrapers jets of compressed air etc are in place in order to prevent the sensor and the magnetic scale from jamming Make sure the mechanical installation meets the system s requirements of distance planarity and parallelism between the sensor and the scale indicated in Figure 2 all along the whole measuring length The ...

Страница 12: ...etween the sensor and the scale is 0 1 mm 0 3 mm 0 004 0 012 Do not use the cover strip it would cause an excessive gap between the sensor and the scale surface WARNING Make sure the mechanical installation complies with the system requirements concerning distance planarity and parallelism between the sensor and the scale as shown in Figure 2 all along the whole measuring length Mount the sensor a...

Страница 13: ...tic scale a zero setting operation is compulsorily required The zero setting operation is further required every time either the sensor or the scale is replaced Refer to pages 27 and 38 Not available for SSI interface MAN SMA1 E 2 9 odt 3 Mounting instructions 13 of 48 ...

Страница 14: ...IN MA Violet 3 Clock IN MA Yellow 4 Data OUT SLO Grey 5 Data OUT SLO Pink 6 not connected White 7 not connected Blue 8 A cos Green 9 A cos Brown 10 B sin Red 11 B sin Black 12 Shielding Shield Case 1 See the order code for the power supply voltage level EXAMPLE SMA1 SC2 Vdc 10Vdc 30Vdc SMA1 SB1 Vdc 5Vdc 5 4 1 T12 cable specifications Model LIKA T12 cable Wires 4 x 0 25 mm2 4 x 2 x 0 14 mm2 twisted...

Страница 15: ...out by the user 4 4 1Vpp sinusoidal output signals For any further information on the 1Vpp sinusoidal signals please refer to the 8 1Vpp sine cosine output signals section on page 42 4 5 Diagnostic LED For any further information on the diagnostic LED please refer to the 9 Error and fault diagnostics section on page 43 4 6 Features summary SMA1 xxx 5 Absolute track physical resolution 5 µm Sine co...

Страница 16: ...d for transmission less electronic components possibility of insulting the circuits galvanically by means of optocouplers high data transmission frequency hardware interface independent from the resolution of the absolute encoder Furthermore the differential transmission increases the noise immunity and decreases the noise emissions It allows multiplexing from several encoders thus process control...

Страница 17: ...aligned protocol LSB right aligned protocol allows to right align the bits beginning from MSB most significant bit to LSB least significant bit LSB is then sent at the last clock cycle If the number of clock signals is higher than the data bits then unused bits are forced to logic level low 0 and lead the data word This protocol can be used in sensors having any resolution The word has a length of...

Страница 18: ...orted in the following table Cable length Baud rate 50 m 400 kHz 100 m 300 kHz 200 m 200 kHz 400 m 100 kHz The time interval between two Clock sequence transmissions must be at least 16 µs Tp 16 µs 5 4 Helpful information The position information increases when the sensor moves in the direction indicated by the arrow in the Figure 1 starting from a min value up to a max value min and max values de...

Страница 19: ...SMA1 5 5 Recommended SSI circuit MAN SMA1 E 2 9 odt 5 SSI interface 19 of 48 ...

Страница 20: ...l see at www lika biz Install the XML file in your BiSS Master device 6 2 Communication The BiSS B mode protocol uses two types of data transmission protocols Register Mode this is used to read data from or write data to the registers of the Slave See the section 6 3 Register Mode on page 20 Sensor mode this is used to transfer process data from the Slave device to the Master device See the sectio...

Страница 21: ...essage contents This is intended to check whether transmission has been performed properly inverted output Polynomial X4 X1 1 binary 10011 Logic circuit 6 4 Sensor mode Sensor mode data 32 bits consists of the following values 24 bit position value Position 1 error bit Error nE 1 warning bit Warning nW and CRC checking CRC 6 bits Sensor data structure Start DATA Stop 31 8 7 6 5 0 Position Error Wa...

Страница 22: ...detected pulses 1569 position 1569 0 1 156 9 mm Error 1 bit It is intended to communicate a normal or fault status of the Slave nE 1 normal status no active error 0 error status the scale is not sensed properly Check the gap between the sensor and the scale check both planarity and parallelism See the 3 Mounting instructions section on page 11 Warning 1 bit Not used nW 1 CRC 6 bits CRC namely Cycl...

Страница 23: ...ress access Description of the function and default value Address register address is expressed in hexadecimal notation Access ro read only rw read and write wo write only Default parameter values are written in bold Profile ID 42 43 ro These registers contain the identification code of the used profile Register 42 43 Hex 28 14 See Standard encoder profile data format Variant 0 24 MAN SMA1 E 2 9 o...

Страница 24: ... and save default parameters default parameters are set at the factory by Lika Electronic engineers to allow the operator to run the device for standard operation in a safe mode As soon as the command is sent the default parameters are uploaded and activated All parameters which have been set previously are overwritten thus previously set values are lost The complete list of machine data and the r...

Страница 25: ...nction or the offset function The value set in the Preset Offset register will have a different meaning depending on the value of this parameter whether it is set to PRESET 0 or OFFSET 1 In the first case Set preset offset PRESET the Preset Offset register is used to set the preset value while in the second case Set preset offset OFFSET the Preset Offset register is used to set the offset value To...

Страница 26: ...ction i e in the opposite direction to the one shown by the arrow in Figure 1 Default 0 Standard NOTE The Counting direction parameter affects the absolute position information not the sine cosine signals The new setting will be active immediately after transmission Use the Save parameters on EEPROM function set 01 in the register 48 to store the new value Configuration register default value 20h ...

Страница 27: ... preset value will be set for the position of the sensor in the moment when the preset value is activated To activate the preset stop the sensor in the desired position enter the desired value next to this Preset Offset register and then send the Save and activate Preset Offset command in the Command register set 02 in the register 48 Offset The offset function is meant to assign a value to a desi...

Страница 28: ...equal to the difference between the overall position information 24 bits see Position and the max position information allowed by the set resolution see the Absolute resolution register Default 00h Device type 55 ro This register describes the type of device Default 06h linear encoder BiSS SINE COSINE signals SINE COSINE resolution 58 ro This register describes the period of the sine cosine signal...

Страница 29: ...5 µs 3 5 µs Timeout Register mode 15 5 µs 17 5 µs 6 7 Examples All values are expressed in hexadecimal notation unless otherwise indicated 6 7 1 Setting the Configuration register Bit 0 Select BiSS SSI BiSS 0 Bit 1 Set preset offset PRESET 0 Bit 2 Enable preset offset ENABLE 0 Bit 3 not used 0 Bit 4 not used 0 Bit 5 Output code BINARY 1 Bit 8 Counting direction INVERTED 1 Bit 7 not used 0 01100000...

Страница 30: ... the Configuration register see the previous 6 7 1 Setting the Configuration register section you want to set and activate the new Preset value 10000010 01 86 A0h Function ADR DATA Tx writing the Preset Offset register 51 01 52 86 53 A0 Save and activate Preset Offset 48 02 6 8 Recommended BiSS circuit MAN SMA1 E 2 9 odt 6 BiSS B mode interface 30 of 48 ...

Страница 31: ...al levels comply with the RS 422 EIA standard 7 1 XML file The product is supplied with an XML file idbiss4C69 xml see at www lika biz Install the XML file in your BiSS Master device 7 2 Communication The BiSS C mode protocol uses two types of data transmission protocols Single Cycle Data SCD this is the primary data transmission protocol It is used to transmit the process data from the Slave devi...

Страница 32: ...ue into mm multiply the received data value by the resolution see 4Dhex Absolute resolution register EXAMPLE 1 SMA1 SB2 5 Absolute resolution 32 hex 0 05 mm detected pulses 123 position 123 0 05 6 15 mm EXAMPLE 2 SMA1 SB2 5 Absolute resolution 64 hex 0 1 mm detected pulses 1569 position 1569 0 1 156 9 mm Error 1 bit It is intended to communicate the normal or fault status of the Slave nE 1 correct...

Страница 33: ...s is the address of the register it specifies the register you need to read from or write to RW 2 bits It sets whether you need to write to the register RW 01 or to read from the register RW 10 RW 01 when you need to write to the register RW 10 when you need to read from the register DATA 8 bit When writing to the register RW 01 this is the value to be set in the register i e transmitted from the ...

Страница 34: ...s Register hex Function 42 43 Profile ID 44 47 Serial number 48 Command 49 Configuration 4D Absolute resolution 51 53 Preset Offset 55 Device type 58 SINE COSINE resolution 78 7D Device ID 7E 7F Manufacturer ID All registers in this section are listed according to the following scheme Function name Address access Description of the function and default value Address register address expressed in h...

Страница 35: ...ue in some register use the Save parameters on EEPROM function in this register to store it Set 01 in the register After having set a Preset Offset value use the Save and activate Preset Offset function in this register to both store and activate the preset offset at the same time Set 02 in the register Load and save default parameters default parameters are set at the factory by Lika Electronic e...

Страница 36: ...T the Preset or Offset value has to be set in the Preset Offset register After having enabled the preset offset functions Enable preset offset ENABLE this item allows to activate either the preset function or the offset function The value set in the Preset Offset register will have a different meaning depending on the value of this parameter whether it is set to PRESET 0 or OFFSET 1 In the first c...

Страница 37: ...ection STANDARD the position information increases when the sensor moves according to the arrow in Figure 1 When the option INVERTED is set Counting direction INVERTED the position information increases when the sensor moves in reverse of the standard direction i e in the opposite direction to the one shown by the arrow in Figure 1 Default 0 Standard NOTE The Counting direction parameter affects t...

Страница 38: ... next to this item and all the previous ad following positions will get a value according to it This function is useful for example when the zero position of the sensor and the zero position of the axis need to match The preset value will be set for the position of the sensor in the moment when the preset value is activated To activate the preset stop the sensor in the desired position enter the d...

Страница 39: ...preset 0F FF FFh 20 bits The Offset value must be less than or equal to the difference between the overall position information 24 bits see Position and the max position information allowed by the set resolution see the Absolute resolution register Default 00h Device type 55 ro This register describes the type of device Default 06h linear encoder BiSS SINE COSINE signals SINE COSINE resolution 58 ...

Страница 40: ...ternal position update frequency 6 kHz 7 7 Examples All values are expressed in hexadecimal notation unless otherwise indicated 7 7 1 Setting the Configuration register Bit 0 not used 0 Bit 1 Set preset offset PRESET 0 Bit 2 Enable preset offset ENABLE 0 Bit 3 not used 0 Bit 4 not used 0 Bit 5 Output code BINARY 1 Bit 8 Counting direction INVERTED 1 Bit 7 not used 0 011000002 60 hex Function ADR D...

Страница 41: ... the Configuration register see the previous 7 7 1 Setting the Configuration register section you want to set and activate the new Preset value 10000010 01 86 A0h Function ADR DATA Tx writing the Preset Offset register 51 01 52 86 53 A0 Save and activate Preset Offset 48 02 7 8 Recommended BiSS circuit MAN SMA1 E 2 9 odt 7 BiSS C mode interface 41 of 48 ...

Страница 42: ...e the resolution NOTE Please note that the counting direction function available in the BiSS interface only affects the absolute position information not the sine cosine signals 8 1 Output signals voltage level The voltage level refers to the differential value between normal and inverted signal differential Recommended input circuit Sensor Input circuit VREF 2 5V 0 5V VA 1Vpp Av Av R2 R1 MAN SMA1...

Страница 43: ... instance an incorrect alignment between the sensor and the scale the gap between the sensor and the scale is out of tolerance see Figure 2 the sensor is not installed properly the sensor or the scale are installed upside down the sensor is installed in the opposite direction to the one shown in the Figure 1 the sensor is travelling too fast the power supply is not as required With BiSS interface ...

Страница 44: ...ons periodically check the soundness of the structure and make sure that there are no loose screws tighten them if necessary check the gap between the sensor and the magnetic scale all along the whole measuring length Wear of the machine may increase the tolerances the surface of the magnetic scale has to be regularly cleaned using a soft and clean cloth to remove dust chips moisture etc MAN SMA1 ...

Страница 45: ...been damaged by short circuit or wrong connection Fault The measured values are either inaccurate or not provided in the whole length Possible cause The gap between the sensor and the scale is not respected all along the whole measuring length see the 3 Mounting instructions section The diagnostic LED is lit The sensor is not installed properly on the scale see the 3 Mounting instructions section ...

Страница 46: ...tandard Bit 7 not used 0 Absolute resolution 05 Preset Offset 00 00 00 BiSS C mode interface Parameters list Default value Command 00 Configuration 20 Bit 0 not used 0 Bit 1 Set preset offset 0 Preset Bit 2 Enable preset offset 0 Enable Bit 3 not used 0 Bit 4 not used 0 Bit 5 Output code 1 Binary Bit 6 Counting direction 0 Standard Bit 7 not used 0 Absolute resolution 05 Preset Offset 00 00 00 All...

Страница 47: ...This page intentionally left blank ...

Страница 48: ... 11 2008 Note about MCD bit section 6 4 Sensor mode 2 3 12 10 2010 5 SSI interface section update 2 4 28 08 2013 General amendment mounting instructions added 2 5 23 05 2014 Section 6 2 update 2 6 06 08 2014 3 Mounting instructions section update 2 7 20 04 2016 General review new BiSS order codes 2 8 11 05 2016 M12 12 pin connector added 2 9 05 05 2020 Sine Cosine track extended to SSI interface L...

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