SAB-Q2 USER MANUAL RAPID CONTROLS LDT to Quadrature
Contents
1. 7 5 to 26 VDC input power minimum 300mA for SAB Q2 and sensors J4 2 Power and signal Ground J4 3 Power passthrough to sensors optional for sensors requiring two supply voltages Table 2 4 Connector J4 Pinout Configuration 3 Configuration 3 1 Jumpers 3 1 1 Jumper X2 The digital outputs of the SAB Q2 can be configured for sourcing or sinking operation Jumper X2 selects this mode of operation Jumper X2 is located on the side of the SAB Q2 next to connector J3 The location of X2 is shown in Figure 3 1 Figure 3 1 Jumper X2 Location shown in Sourcing configuration The common voltage on J1 8 is used by the Send All inputs as as well as the status outputs The Send All inputs are bidirectional and can work with sinking or sourcing inputs but the common voltage at J1 8 must match the X2 setting If ground is applied to pin J1 8 the outputs will be sinking and the jumpers must be installed 1 3 2 4 5 7 and 6 8 If a voltage 12 to 24 VDC is applied to J1 8 the outputs will source this voltage and X2 must be set 1 2 3 4 5 6 and 7 8 Possible settings for jumper X2 are shown in Table 3 1 and in Figure 3 2 Shunt Placement Output Confiuration J1 8 Common 1 2 3 4 5 6 7 8 Sourcing 12 to 24 VDC 1 3 2 4 5 7 6 8 Sinking Ground Table 3 1 Jumper X2 Settings Configuration Sourcing Sinking l l l l Outputs Outputs 1 2 3 4 5 6 7 8 1 3 2 4 5 7 6 8 Figure 3 2 Jumper X22. Z Ground A A B B Z Z Ground gt Rapid Controls SAB Q2 dea U JOSUaS y jeuuey PWR PWR and GND on J4 and J3 r are connected 7 Jumper Settings internally PWR is Sourcing lI Sinking typically only used Outputs Outputs with 15V sensors 1 23 45 6 7 8 BD 2 3 2 45 7 6 8 Encoder Interface Channel B Channel A o LEDs Ch B Ch A System y v 888 510 7688 www rapidcontrols com Sendall Input Detail Status Output Detail J1 6 x s K D J1 9 Status A Figure 2 1 SAB Q2 Connector Placement 2 1 1 Connector J1 Connector J1 provides the connections for communications and digital IO The pinout of J1 is shown in Table 2 1 If the host computer requires the use of hardware handshaking the host s DTR line must be tied to the host s DSR line pin 4 to pin 6 on a DB9 and the host s RTS line must be tied to the host s CTS line pin 7 to pin 8 on a DB9 Installation Pin Function J1 1 Logic Ground J1 2 RS 232 RX from Host J1 3 RS 232 TX to Host J1 4 RS 485 TxD RxD RS 485 A J1 5 RS 485 TxD RxD RS 485 B J1 6 Channel A Send All Input J1 7 Channel B Send All Input J1 8 Input Common J1 9 Channel A Sensor Status Output J1 10 Channel B Sensor Status Output Table 2 1 Connector J1 Pinout 2 1 2 Connector J2 Connector J2 provides connections for the quadrature outputs Pins 1 through 7 are the connections for the Channel A e
3. 150 inch 2000 us 150 inch lt Length lt 200 inch 2500 us 200 inch lt Length lt 250 inch 3000 us 250 inch lt Length lt 300 inch 3500 us 300 inch lt Length lt 350 inch 4000 us 350 inch lt Length lt 400 inch Table 3 6 SAB Q2 Transducer Length and Update Period Relationship 0 002 inches per count with no recirculations The Gradient is only applicable when using a Start Stop or PWM output sensor The Gradient value is typically printed on the sensor label and is different for each sensor The SAB Q2 expects the gradient to be entered in microseconds per inch If your sensor lists the gradient value in meters per second convert to microseconds per inch using Equation 3 1 25400 Gm s 3 2 2 5 Recirculations The effective resolution of a digital pulse output sensor can be improved using a technique called Recirculation The sensor is rapidly interrogated multiple times in a row The resulting value will have an effective resolution equal to the base resolution times the number of recirculations For example a PWM sensor using 4 recirculations will have an effective resolution of 0 0005 inches count when used with a SAB Q2 Using recirculations causes the response time of the sensor to increase Each recirculation requires as much time to complete as a single sensor reading The SAB Q2 will automatically adjust the update period to reflect recirculations used by the sensor The Recirculation parameter is only applicab
4. sensors have a resolution of 0 002 inches per count with no recirculation The maximum travel speed for Start Stop and PWM sensors with no recirculations is 224 inches per second Divide this number by the number of recirculations when recirculations are used For example a PWM sensor with 4 recirculations will have a resolution of 0 0005 inches per count and a maximum travel speed of 56 inches per second 3 3 2 SSI The maximum speed can be determined by multiplying 112 000 by the resolution of the sensor SSI sensors are factory configured with a particular resolution though it may be possible to program the sensor after purchase To determine the maximum travel speed multply 112 000 by the resolution of the SSI sensor For example an SSI sensor with 1 micron resolution will have a maximum travel speed of 112 000 micron per second or 4 409 inches per second Table 3 8 shows maximum travel speeds for some common sensor resolutions Sensor Resolution Maximum Travel Speed 1 micron per count 4 4 inches per second 2 micron per count 8 8 inches per second 5 micron per count 22 inches per second 10 micron per count 44 inches per second 25 micron per count 110 inches per second 50 micron per count 220 inches per second Table 3 8 Maximum travel speeds for com mon resolutions 14 General Operation 4 General Operation 4 1 Startup At power on the board will print a sign on message indicating the date of software in
5. source 12 to 24VDC to activate the input 4 4 2 Status Outputs The X2 jumper is used to configure the status outputs to match the common applied to J1 8 see Section 4 4 1 If the common is grounded then the outputs must be jumpered to be sinking If the common is connected to 12 to 24VDC then the outputs must be jumpered to be sourcing See Section 3 1 1 for further information on Jumper X2 16
6. RAPID CONTROLS gt SAB Q2 USER MANUAL LDT to Quadrature Converter Rapid Controls Inc January 12 2011 Rapid City SD USA 2011 Rapid Controls Inc www rapidcontrols com info rapidcontrols com tel 605 348 7688 fax 605 341 5496 Contents 1 Introduction 1 1 Description 1 2 Features and Specifications 1 3 Models and Ordering Information 2 Installation 2 1 Connections 3 Configuration 3 1 Jumpers 3 2 Setup Menu 3 3 Setup Considerations 4 General Operation 4 1 Startup 4 2 Sensor Processing 4 3 Status 4 4 Digital IO Contents 15 Introduction 1 Introduction 1 1 Description The SAB Q2 converts two channels of linear or rotary position data to two channels of differen tial ABZ quadrature To achieve accurate low latency output the conversion is implemented using a micro controller and EPLD The SAB Q2 continuously interrogates the sensors at a configurable rate Quadrature data is output to maintain a quadrature position equal to the position interrogated from the sensors The SAB Q2 maintains a record of the current quadrature output and works to output a stream of quadrature states needed to equalize the quadrature output and the sensor position Becuase quadrature is inherently limited to presenting relative changes in position two methods are available for synchronising the absolute position of the magnetostrictive sensor and the quadrature position e lt A marker position m
7. Settings 3 2 Setup Menu Configuration of the SAB Q2 is accomplished through an interactive setup menu The setup items accessable in this menu are stored in non volatile memory The setup menu is used to configure operation of the SAB Q2 To ensure that the quad rature output of the SAB Q2 is correct configuration must be completed during installation The configuration must be updated if any of the following events occur e A digital pulse output sensor is replaced by a sensor with a different gradient A digital pulse PWM output sensor is programmed to have a different number of internal recirculations An SSI output sensor is replaced by a sensor with a different resolution An SSI output sensor is reprogrammed to have a different resolution The desired quadrature output resolution has changed The desired range of the analog output has changed on SAB Q2 ANA models The setup menu can be accessed via an RS 232 serial connection using a computer or other terminal device connected to the J1 connector The connection should be established using the parameters shown in Table 3 2 To access the setup menu transmit press a key several characters quickly The SAB Q2 will detect this serial activity and display a setup menu with a prompt for further input The setup menu will display a list of parameters and values Each of these parameters may be changed by transmitting the letter shown next to the parameter In addition to the setup parameter
8. ay be configured Whenever the sensor position equals the marker position the quadrature Z lines are active This can be used to set the host quadrature counters to a known value effectively homing the system e The Send All inputs may be used When the Send All input is activated the SAB Q2 will send all position data immediately If the host quadrature counters are zeroed before the Send All event this will have the effect of homing the system Sensor update rate sensor type scaling offsetting maximum quadrature output rate and analog output scaling are configurable using a text based menu accessible via an RS 232 serial port Status LEDs provide visual confirmation of proper sensor operation A Sensor OK output for each channel allows an external device to monitor sensor interface status Although the SAB Q2 was designed for use with magnetostrictive linear displacement trans ducers it can be used with other types of sensors such as glass scales or lasers To be used with the SAB Q2 a sensor must be compatible with the one of the sensor protocols supported by the SAB Q2 SSI Start Stop digital pulse or PWM digital pulse 1 2 Features and Specifications e Two channels of 24 bit position from Start Stop PWM or binary SSI magnetostrictive transducers Two channels of 5 volt differential A B and Z outputs RS 422 level Fast quadrature output of up to 112 inches per second with 0 001 inch resolution Quadrature outputs are speed p
9. e with 2 or 4 sensor channels Two channel models are available with optional analog voltage outputs Sensor support varies by model SAB Q2s are available with support for SSI sensors digital pulse output Start Stop and PWM sensors free running internally interrogated PWM sensors and single ended non differential Start Stop output sensors Model Number Channels Sensor Interface Analog Output SAB Q2 2 RPM 2 Start Stop amp PWM SAB Q2 2 SSI 2 SSI SAB Q2 2 PF 2 Free Running PWM SAB Q2 2 RPM ANA 2 Start Stop amp PWM 2x 16 bit SAB Q2 2 SSI ANA 2 SSI 2x 16 bit SAB Q2 2 PF ANA 2 Free Running PWM 2x 16 bit SAB Q2 4 RPM 4 Start Stop amp PWM SAB Q2 4 SSI 4 SSI _ SAB Q2 4 PF 4 Free Running PWM Table 1 1 Models and Ordering Information Installation 2 Installation 2 1 Connections Figure 2 1 shows the location of the connectors on the SAB Q2 PWR Optional 3 Ground RS232 RX from Host RS232 TX to Host Reserved Reserved Send All A Sendall A Sendall B oo DIO Common Status A Status B Power Ground PWR Typ 24VDC J 1 PWR PT7 Ground 13 PWR 145 Data Gate Stop 144 Data Gate Stop 10 Clk Int Start Ig Clk Int Start J g PWR Ground PWR 5 Data Gate Stop 4 4 Data Gate Stop J 3 Clk Int Start I 3 Clk Int Start 4 Comm amp Dig BSLCMNAUBWNE g jouueyD A A B B Z
10. equency 10 KHz 10 kHz 40 kHz 18 KHz 18 kHz 72 kHz 28 KHz 28 kHz 112 kHz Table 3 7 SAB Q2 Quadrature Output Speeds 12 Configuration 3 2 2 10 Analog Center The Analog Center is only applicable to SAB Q2 ANA models The Analog Center is a position in counts that identifies the position where analog output is OV Positions below the Analog Center will result in a voltage below zero positions above the center will result in a voltage above zero 3 2 2 11 Analog Range The Analog Range is only applicable to SAB Q2 ANA models The Analog Range identifies the number of counts above and below the Analog Center position where analog output is at full scale 10V or 10V Positions greater than Analog Center Analog Range result in 10V output Positions less than Analog Center Analog Range result in 10V output 3 2 2 12 Analog Force Flag The Analog Force Flag controls the analog force mode of the SAB Q2 When analog force mode is enabled the analog output is set to a user entered voltage and normal position based analog output is disabled When the Analog Force Flag is set to 1 force mode is enabled when it is set to 0 force mode is disabled 3 2 2 13 Analog Force Voltage The Analog Force Voltage is the voltage that is output when the Analog Force Flag is set to 1 Otherwise Analog Force Voltage is ignored 3 2 2 14 Save to EEPROM Select Save to EEPROM to save the configuration values to non volatile memory An
11. er count before scaling A quadrature output of 0 001 inches per count 25 4 micron per count is desired To find the scalar divide the effective sensor resolution by the desired resolution In this case z 0 39370 so a scalar of 0 39370 is used 3 2 2 7 Offset The Offset configuration value is entered in counts This value is subtracted from the sensor position after scaling occurs The offset value is used when the SAB Q2 calculates marker output analog output and Send All The Offset is used to Zero the output of the SAB Q2 for marker output analog output and Send All 3 2 2 8 Marker The Marker is the position in counts where the Z quadrature lines will be active Whenever the quadrature position is equal to the marker the Z lines are asserted If the controller sup ports a marker it will reset the quadrature position counter to a preset value when the marker is asserted This is one method of homing the system and achieving absolute positioning 3 2 2 9 Maximum Quadrature Speed The SAB Q2 is capable of outputing quadrature data at 28 kHz pre quadrature Post quad rature this is equivalent to 112 kHz If the controller requires that quadrature data be kept below a certain speed the Maximum Quadrature Speed configuration value can be used to adjust the quadrature frequency The values listed Table 3 7 show the pre and post quadrature frequencies available Menu Entry Pre Quadrature Frequency Post Quadrature Fr
12. le to digital pulse sensors and is typically used only with PWM sensors configured for internal recirculations 3 2 2 6 Scalar The position data received from the sensor is multiplied by the Scalar configuration value before being used by the SAB Q2 The scalar is applied after SSI shifting and before offseting All SAB Q2 functions that use position data will use the scaled position value The scalar can only be used to reduce the resolution of the sensor In other words the scalar must be equal to or less than 1 0 11 Configuration Example 1 A Start stop sensor is being used This sensor has a nominal resolution of 0 002 inches per count The desired quadrature output is 20 counts per inch or 0 05 inches per count To find the required scalar divide the sensor resolution by the desired resolution In this case 9 002 0 04 so a scalar of 0 04 is used Example 2 A 24 bit SSI sensor is being used This sensor has a factory set resolution of 5 micron per count A quadrature output of 0 001 inches per count 25 4 micron per count is desired To find the scalar divide the sensor resolution by the desired resolution In this case 527 0 19685 so a scalar of 0 19685 is used Example 3 The same 24 bit SSI sensor from Example 2 is used with a factory set resolution of 5 micron per count The Transducer Type configuration value is set to SS124 2 which divides the resolution of the sensor in half for an effective resolution of 10 micron p
13. m an external power supply or does not require a second supply voltage leave pins 7 and 14 unconnected Ensure that the sensor ground is connected to the SAB Q2 ground at J3 6 or J3 13 Pin Channel Function J3 1 A Clock Interrogate Start to Sensor J3 2 A Clock Interrogate Start to Sensor J3 3 A Data Gate Stop from Sensor J3 4 A Data Gate Stop from Sensor J3 5 A Power to the Sensor internally connected to J4 1 J3 6 A Ground connect to sensor ground J3 7 A Power to the Sensor internally connected to J4 3 optional J3 8 B Clock Interrogate Start to Sensor J3 9 B Clock Interrogate Start to Sensor J3 10 B Data Gate Stop from Sensor J3 11 B Data Gate Stop from Sensor J3 12 B Power to the Sensor internally connected to J4 1 J3 13 B Ground connect to sensor ground J3 14 B Power to the Sensor internally connected to J4 3 optional Table 2 3 Connector J3 Pinout 2 1 4 Connector J4 Connector J4 provides connections for supply power Pin 1 of J4 provides power to the SAB Q2 and is connected internally to J3 5 and J3 12 Pin 2 must be connected to the return ground of the power supply This ground is connected internally to J3 6 and J3 12 If seperate power supplies are used to power the SAB Q2 and sensors ensure that the sensor ground and SAB Q2 ground are connected together The pinout of J4 is shown in Table 2 4 Pin Function J4 1
14. ncoder interface and Pins 8 through 14 are the connections for the Channel B encoder interface The pinout of J2 is shown in Table 2 2 Pin Channel Function J2 1 A Quadrature A Line J2 2 A Quadrature A Line J2 3 A Quadrature B Line J2 4 A Quadrature B Line J2 5 A Quadrature Z Line J2 6 A Quadrature Z Line J2 7 A Logic Ground J2 8 B Quadrature A Line J2 9 B Quadrature A Line J2 10 B Quadrature B Line J2 11 B Quadrature B Line J2 12 B Quadrature Z Line J2 13 B Quadrature Z Line J2 14 B Logic Ground Table 2 2 Connector J2 Pinout 2 1 3 Connector J3 Connector J3 provides connections for the sensor interfaces Pins 1 through 7 are the connec tions for the Channel A sensor interface and Pins 8 through 14 are the connections for the Channel B sensor interface The pinout of J2 is shown in Table 2 3 Installation Pins 5 and 12 of J3 are connected internally to J4 1 and are intended to help with power distribution to the sensors If the sensor is powered from an external power supply Pins 5 and 12 of J3 may be left unconnected Ensure that the sensor ground is connected to the SAB Q2 ground at J3 6 or J3 13 Pins 7 and 14 of J3 are connected internally to J4 3 and are intended to help with power distribution to the sensors Some older sensors require two supply voltages typically 15V and 15V The second supply voltage may be distributed to these types of sensor through pins 7 and 14 If the sensor is powered fro
15. nfiguration 3 2 2 Configuration Parameters 3 2 2 1 Transducer Type The Transducer Type configuration parameter must be set to match the type of sensor being used with the SAB Q2 Depending on the SAB Q2 model purchased only some of the options shown in the Transducer Type menu will be valid For example a SAB Q2 2 SSI cannot be used with a Start Stop sensor but the Start Stop option will still be present in the menu Configuration Several SSI Transducer Type options are presented The options labeled SSI24 n divide the position returned from the sensor by n This can be used to reduce the number of quadrature counts output when using a high resolution sensor Menu Entry Sensor Types Supported SAB Q2 Model Support Notes Start Stop Digital pulse Start Stop protocol sensors SAB Q2 x RPM None PWM Digital pulse PWM protocol sensors SAB Q2 x RPM None SSI24 24 bit SSI protocol sensors SAB Q2 x SSI None SS124 2 24 bit SSI protocol sensors SAB Q2 x SSI Position value is divided by 2 SS124 4 24 bit SSI protocol sensors SAB Q2 x SSI Position value is divided by 4 SS124 8 24 bit SSI protocol sensors SAB Q2 x SSI Position value is divided by 8 SS124 16 24 bit SSI protocol sensors SAB Q2 x SSI Position value is divided by 16 Table 3 4 SAB Q2 Transducer Type Options 3 2 2 2 SSI Protocol The SSI Protocol configuration parameter is only used when the Transducer Type is set to one of the SSI selections The SSI protocol selec
16. roportional with selectable maximum frequency Marker Z outputs identify a unique position on each sensor Send All inputs cause absolute position of each channel to be output Supports arbitrary SSI sensor resolution Introduction e 56 MHz oscillator provides 0 002 inch base resolution with no recirculations with Start Stop or PWM sensors e Maximum SSI transducer length of 165 inches for 2 um resolution 412 inches for 5 wm Maximum quadrature output rate selectable from 40k 72k or 112k states per second on each channel Two channels of 5 volt differential A B and Z outputs RS 422 level Transducer OK output and LED signals valid transducer operation Software selectable sensor length update rate gradient offset scale and output frequency Interactive setup menu available via RS 232 serial interface System LED indicates good operation of SAB Q2 Non volatile memory for storage of setup parameters Two electrically isolated DC inputs for Send All 12 24 VDC Two electrically isolated DC outptus for Sensor OK 0 24VDC at 50 mA Removable screw terminal connections Power requirements 7 5 26 VDC at lt 300 mA optional features may consume more current 4 64 x 5 31 x 1 77 DxHxW inch DIN rail mount enclosure e Model SAB Q2 ANA analog outputs e Resolution is 16 bit 0 3 mV with 10 0V to 10 0V output range e Output current 5 mA 1 3 Models and Ordering Information Table 1 1 shows the available SAB Q2 models SAB Q2 units are availabl
17. s the menu shows the position most recently gathered from the sensors After changes have been made the changed parameters must be committed to non volatile memory or they will be lost when power is removed from the SAB Q2 Choose Save to EEP ROM to save all parameters to non volatile memory To exit the setup menu and return to normal operation choose Quit from the menu transmit the letter Q or cycle power to the SAB Q2 The SAB Q2 does not output quadrature while the setup menu is in use To indicate this condition the System LED will stop blinking while the setup menu is in use Do not attempt Configuration to use any machine that relies on position information from the SAB Q2 while using the setup menu Parameter Configuration Baud Rate 9600 bps Data Bits 8 Parity None Stop Bits 1 Handshaking None Table 3 2 Serial Parameters 3 2 1 Default Configuration A set of default parameters see Table 3 3 are stored in the SAB Q2 when it leaves the factory The default parameters can be restored by selecting the Factory Defaults option from the setup menu Setup Item Default Value Recirculations 2 Marker Position 4000 counts Transducer Type Start Stop Transducer Length 84 inch Scalar 1 0 Offset 0 counts Gradient 8 928571 us inch Maximum Quadrature Frequency 28 kHz Analog Center 0 counts Analog Range 32767 counts Analog Force Flag 0 Off Analog Voltage 0 0 Volts Table 3 3 SAB Q2 Default Co
18. the board and the status of the retrieval of data stored in the non volatile EEPROM A message similar to the following will be displayed Rapid Controls Inc SAB Q2 Copyright c 1997 2010 Rapid Controls Inc 03 01 2010 EEPROM load successful 4 2 Sensor Processing The SAB Q2 interfaces with two magnetostrictive transducers and interrogates the sensors for position information at a configurable rate Two quadrature outputs attempt to follow the position received from the sensors A current quadrature count value is maintained by the SAB Q2 After position is received from the sensor the position is compared with the quadrature count Any difference between the values will be output via quadrature during the next sensor update period The position data collected by the SAB Q2 is also used for analog retransmission output on SAB Q2 ANA models Position data is scaled and offset before being used for quadrature or analog output 4 2 1 Sensor Interface Each sensor interface is capable of interfacing with a sensors supporting particular output protocols SAB Q2 SSI models support Synchronous Serial Interface sensors with a 24 bit data word and binary or gray coding SAB Q2 RPM models support differential digital pulse protocols common to magnetostrictive sensors Start Stop and Pulse Width Modulated PWM The SAB Q2 PF models support free running PWM sensors sometimes called inter nally interrogated PWM These sensors do not
19. ts the numerical format used by the sensor SSI values are typically transmitted as a standard binary value or as a Gray coded value When Graycode is selected as the SSI Protocol the position data is converted to binary before being used by the SAB Q2 Menu Entry Sensor Protocol Supported Binary 24 bit Binary Synchronous Serial Interface SSI Graycode 24 bit Graycode Synchronous Serial Interface SSI Table 3 5 SAB Q2 SSI Protocol Options 3 2 2 3 Transducer Length The Transducer Length configuration parameter should be set to the length of the sensor in inches When using a magnetostrictive sensor the maximum update rate is directly controlled by the length of the sensor and number of recirculations that are performed Adjustments to the update rate to account for recirculations will be performed automatically if the Recirculations configuration item see below is set correctly 3 2 2 4 Gradient The Gradient represents the average speed that the magnetostrictive pulse travels down the sensing element SSI sensors use this value internally to convert to the resolution specified when ordering the sensor For digital pulse output sensors this conversion must be performed externally The SAB Q2 uses the gradient value to normalize digital pulse output sensors to 10 Configuration Update Period Sensor Length 500 us Length lt 50 inch 1000 us 50 inch lt Length lt 100 inch 1500 us 100 inch lt Length lt
20. wait for an interrogation signal from the SAB Q2 Instead the output signal is transmitted by the sensor without outside signalling This model will also support PWM sensors that are interrogated by an external device 4 3 Status A red LED on the board blinks during operation Two green LEDs indicate the status of the transducers A lit LED indicates a good transducer and a dim or dark LED indicates a missing or failing transducer or magnet Sensor status may also be read via the digital outputs 15 General Operation 4 4 Digital IO The SAB Q2 is equipped with two digital inputs and two digital outputs The digital in puts are used to control Send All The digital outputs indicate sensor status Connector J1 see Section 2 1 1 for pin out information contains the connections for the digital inputs and outputs 4 4 1 Send All Inputs The inputs signal send all when activated This causes the all position information to be transmitted over the quadrature interface If the controller s quadrature counters are zeroed before send all is activated the quadrature counter will be synced with the sensor position homed The inputs are bidirectional and can source or sink current depending on the voltage applied to J1 8 If the controller has a sinking output apply 12 to 24 VDC to J1 8 and allow the controller to ground the send all input to activate it If the controller has a sourcing output apply ground to J1 8 and allow the controller to
21. y configu ration items changed will not be saved until this option is selected Any changes made without saving will be lost when power is cycled 3 2 2 15 Load from EEPROM Select Load from EEPROM to load the values from the non volatile memory This will revert any changes made since the last time values were saved to non volatile memory 3 2 2 16 Factory Defaults Select Factory Defaults to change all of the setup values to the factory defaults as shown in Table 3 3 Defaults are not saved to non volatile memory until the Save to EEPROM menu item is selected 13 Configuration 3 2 2 17 Quit Select Quit to exit the setup menu and return to normal operation The configuration values entered via the setup menu will be in effect at this point Any values not saved to the EEPROM will be lost when power is removed 3 3 Setup Considerations The SAB Q2 is limited to a maximum output rate of 112 000 quadrature output states per second Together with the resolution of the sensor a maximum travel speed can be calcu lated If the maximum travel speed is exceeded the SAB Q2 will not lose track of position Instead the quadrature output will lag behind the sensor position until speed is reduced It is recommended that the maximum travel speed not be exceeded during normal use 3 3 1 Start Stop and PWM The maximum speed can be determined by multiplying 112 000 by the resolution of the sen sor When used with the SAB Q2 Start Stop and PWM
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