1756-Show I/O User`s Manual
Contents
1. 10 15 14 13 12 11 10 9 8 7 4 3 2 1 0 0 Hours 1 Minutes 2 Seconds 3 Frames 4 x x x x x Drop Gen Lock Frame Rate 5 Error Codes 6 x x x x x x x x x x x x x x 7 x x x x x x x x x x x x x x Module Input File The next two chapters contain complete descriptions of the function of each word in the Input File Bits marked x are reserved for future use They are all set to zero Module I O Using the Module as a SMPTE Generator The 1756 Show I O contains a very versatile SMPTE generator which has been designed for flexibility and ease of use With this generator one can easily accomplish many tasks e Produce SMPTE time code at all common frame rates e Roll time code from a start point to an end point e Create an automatic loop of time code that will continue running without further intervention SMPTE o Lu Z O e Create jumps or discontinuities in the time code Generator Theory of Operation The SMPTE generator is always active in order to produce an internal frame clock Every frame the time code output advances by one frame if the generator is running or remains unchanged if the generator is idling When the generator is idling the output can be muted to prevent transmitting the same SMPTE code over and over The generator constantly compares the SMPTE output to the user s Loop End T2. 1756 Show I O User s Guide peat SENS 51 by Alcorn McBride Inc Document Revision 1 0 October 2003 Copyright O 2003 Alcorn McBride Inc All rights reserved Every effort has been made to assure the accuracy of the information contained in this manual and the reliability of the hardware and software Errors sometimes can go undetected however If you find one please bring it to our attention so that we can correct 1t for others Alcorn McBride Inc reserves the right to make changes to these products without notice in order to improve their design or performance Applications described herein are for illustrative purposes only Alcorn McBride Inc assumes no responsibility or liability for the use of any of these products and makes no representation or warranty that the use of these products for specific applications will be suitable without further testing or modification Our Show Control equipment is not intended for use in applications where a malfunction can reasonably be expected to result in personal injury or damage to equipment Customers using or selling Alcorn McBride Inc products for use in such applications do so at their own risk and agree to fully indemnify Alcorn McBride Inc for any damages resulting from such improper use or sale The 1756 Show I O incorporates technology which is licensed from Allen Bradley Company Inc Allen Bradley has not technically approved nor does it warrant
3. Once all these values are filled the SMPTE Generator can be started as follows Set the Mode bit to 1 for SMPTE Generation Mode 0 is Read SMPTE 2 Set the Loop bit if required 3 Set the Set bit to force the card to begin SMPTE generation from the Set Time when you enable timecode 4 Set the Run bit to start SMPTE generation For further information on how to set the card up for SMPTE generation please consult the example file Alcorn_1756_SMPTE_GenTest ACD which came with the card This file can also be downloaded at www alcorn com Using the Module as a SMPTE Generator 17 18 Using the Module as a SMPTE Generator Using the Module as a SMPTE Reader The 1756 Show I O contains a robust SMPTE reader regenerator which has been designed for flexibility and ease of use e Read external SMPTE time code at all common frame rates e Automatically detect changes in frame rate e Regenerate fresh time code from a noisy or partially corrupted source e Flywheel through dropouts in the incoming time code with adjustable tolerance Reader Theory of Operation Whenever the 1756 Show I O is in read mode it constantly searches for valid incoming time code As soon as two consecutive valid frames arrive the reader locks its internal generator to the incoming code As long as the incoming code remains valid the generator remains in lock The reader constantly tests the incoming time code to be sure it
4. or switch from RUNNING to IDLING if the Loop bit is clear zero If the unit is idling and the MUTE bit is set mute the SMPTE output Make the time code available to the PLC through the Input File Configuring the Generator The 1756 Show I O generator is entirely controlled by words in the PLC Output File See the Module I O Space chapter for a diagram of the Output File Operating Mode When the MODE bit is set one the module will generate SMPTE time code internally When this bit is clear zero the module will read external SMPTE time code 12 Using the Module as a SMPTE Generator Frame Rate The generated SMPTE frame rate is determined by this 3 bit field Bit 0 10 Bit 0 9 Bit 0 8 30 fps 0 0 0 29 97 fps non drop 0 0 1 29 97 fps drop 0 1 0 25 fps 0 1 1 24 fps 1 0 0 23 976 fps 1 0 1 The other two codes 110 and 111 are reserved for future use Loop Start End Times When the SMPTE output reaches the Loop End Time it immediately jumps to the Loop Start Time if the LOOP bit is set or halts if the LOOP bit is clear Any invalid entries such as minutes greater than 59 will be treated as if the entry were zero An error bit will be set in the Input File to highlight the problem field SMPTE o Lu Z O Loop Behavior If the LOOP bit is set one then when the SMPTE output reaches the Loop End Time the generator will jump to the Loop Start Time
5. Click Finish to exit the Module Properties window Module I O It is now possible to enter the User Defined Data Types To do so 1 Expand and right click the Data Types User Defined tree and select New Data Type Enter the Structure Name as 1756_SMPTE_Inputs Enter the table information as listed in Appendix A After the information has been entered the size of the Input Data Type should be 8 bytes while the size of the Output Data Type should be 16 bytes 4 After this information has been entered it will be possible to build ladders referring to the actual literal Data Type Names for the resources Output File The eight words in the output file configure and control the SMPTE module 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 x x x x x Frame Rate Mode Mute x Loop x Set Stop Run 1 Dropout Tolerance 2 Set Hours Set Minutes 3 Set Seconds Set Frames 4 Loop Start Hours Loop Start Minutes 5 Loop Start Seconds Loop Start Frames 6 Loop End Hours Loop End Minutes 7 Loop End Seconds Loop End Frames Module Output File The next two chapters contain complete descriptions of the function of each word in the Output File Bits marked x are reserved for future use They should always be set to zero Module I O 9 Input File The eight words in the input file indicate module status to the PLC
6. Module I O Configuration Tables 1 AS 1 Welcome Since the first V16 was introduced in 1986 Alcorn McBride has been providing high quality show control solutions to the entertainment industry The 1756 Show I O module brings that same power to the Allen Bradley ControlLogix family of programmable logic controllers We at Alcorn McBride are pleased to provide you with these tools Good luck have fun and thanks for choosing Alcorn McBride What is SMPTE Time Code Think for a moment about any recorded performance It could be a stereo recording of a symphony orchestra a video of your child s birthday party or your favorite motion picture It would be very desirable to know the length of the performance and to be able to jump in to any point in the recording accurately Early systems provided such capabilities by linking a mechanical counter to the tape or film reels By counting revolutions of the reel one could return to the same point in the recording repeatably and get some sense of the overall length of the piece Mechanical or electronic counters work very well In fact they are still in widespread use in much of today s audio and video equipment However they do have drawbacks such as the lack of consistency from one machine to another and the fact that the counts can change when the tape gets edited or copied A far more accurate system would encode the time information as a part of the presentation itself perhaps
7. Reader 21 SMPTE Reader Monitoring the Status of the Reader 22 The 1756 Show I O reader regenerator communicates its status to the PLC through the Input File See the Module I O Space chapter for a diagram of the Input File Current Time The current incoming SMPTE time code is always available through four words in the PLC Input File Word 0 hours will always be between 0 and 23 inclusive Word 1 minutes will always be between 0 and 59 inclusive Word 2 seconds will always be between 0 and 59 inclusive Word 3 frames will always be between 0 and 29 inclusive Note Word 3 frames can change 30 times per second This could impact your programming technique if your program s scan time exceeds 33 milliseconds Current Frame Rate The low byte of word 1 in the Input File always contains the number 24 25 or 30 to indicate the frame sequence of the incoming time code No distinction is made between 23 976 and 24 frame rates or between 29 97 and 30 frame rates Locked When the received time code is valid this bit in the Input File is set one If the received time code drops out or becomes corrupt this bit is cleared Self Generating Whenever the internal SMPTE generator is running this bit in the Input File is set one If the internal generator switches into idle mode this bit will be cleared Drop Frame If the incoming time code has its drop frame flag set then this bit will be set If the incom
8. consult the example file Alcorn_1756_SMPTE_ReadTest ACD which came with the card This file can also be downloaded at www alcorn com Thanks for purchasing the Alcorn McBride 1756 Show I O module We hope you ll find that it makes your PLC programming job a little bit easier Using the Module as a SMPTE Reader 23 SMPTE Reader 24 Using the Module as a SMPTE Reader Appendix A Module I O Configuration Tables Output Structure Name 1756 SMPTE Outputs Size 16 byte s Name Data Type Style Run BOOL Decimal Stop BOOL Decimal Set BOOL Decimal Reserved_Bit_3 BOOL Decimal Loop BOOL Decimal Reserved_Bit_5 BOOL Decimal Mute BOOL Decimal Mode BOOL Decimal Frame_Rate_Code SINT Decimal Dropout_Tolerance INT Decimal SetHours SINT Decimal SetMinutes SINT Decimal SetSeconds SINT Decimal SetFrames SINT Decimal LoopStartHours SINT Decimal LoopStartMinutes SINT Decimal LoopStartSeconds SINT Decimal LoopStartFrames SINT Decimal LoopEndHours SINT Decimal LoopEndMinutes SINT Decimal LoopEndSeconds SINT Decimal LoopEndFrames SINT Decimal Appendix A Module I O Configuration Tables 25 Input Structure Name 1756 SMPTE Inputs Size 8 byte s Name Data Type Style Hours SINT Decimal Minutes SINT Decimal Seconds SINT Decimal Fram
9. or support the 1756 Show I O All warranty and support for the 1756 Show I O and its application is provided solely by Alcorn McBride ControlLogix and RS Logix5000 are trademarks of Allen Bradley Rockwell Automation Inc Product Design Jeremy Scheinberg Jim Janninck Documentation Jeremy Scheinberg Jim Janninck Alcorn McBride Inc Alcorn McBride Inc 3300 S Hiawassee Suite 105 Orlando Florida 32835 407 296 5800 FAX 407 296 5801 http www alcorn com info alcorn com Contents Welcome What is SMPTE Time Code nr i ii Technical SUPOT oere nende aeaee o un ant fan Installing the 1756 Show I O Setting the SMPTE Output Level Module Power Consumption s Installing the Module in the ControlLogix Chassis SNA bonnement Moditle Pimout oss tisse nt ann ini tin e Module I O Module Configuration ss Output File soon oil Tp a Using the Module as a SMPTE Generator Generator Theory of Operation Configuring the Generator Rss Controlling the Generator Monitoring the Status of the Generator Typical Applications amp Sample RUNS ooooonoccnocconccononononanonancnncc naco nonnncn noo Using the Module as a SMPTE Reader Reader Theory of Operation ss Configuring the Reader Controlling the Reader ss Monitoring the Status of the Reader Typical Applications amp Sample RUNS oooooncccocncoccnoconanonnonnnconoco noc reen renee Appendix A
10. Loop Bit These bits are not used by the SMPTE reader Controlling the Reader The 1756 Show I O reader regenerator is entirely controlled by words in the PLC Output File See the Module I O Space chapter for a diagram of the Output File Note The 1756 Show I O samples the control bits in the output file once per frame Control pulses of less than 33 milliseconds duration may not activate the module reliably Starting the Reader Whenever the RUN bit transitions from a zero to a one the reader begins searching for incoming time code If the reader is already running the rising edge on the RUN bit has no effect When the operating mode is switched from generate to read or upon entering read mode on powerup the module automatically begins searching for incoming time code It is not necessary to activate the RUN bit in this case Stopping the Generator Whenever the STOP bit transitions from a zero to a one the reader stops searching for incoming time code and the internal generator goes idle If the reader is already inactive the rising edge on the STOP bit has no effect Mute Behavior If the MUTE bit is set one then the SMPTE output is muted Time code can continue to be received but the output does not retransmit the code It is as if the output cable has been unplugged If the MUTE bit is clear zero then the SMPTE output sends a regenerated copy of whatever time code is being received Using the Module as a SMPTE
11. and continue generating from there If the LOOP bit is clear zero then the SMPTE output will stop at the Loop End Time Notice that by setting the Loop Start Time equal to the Loop End Time the module can be made to generate a continuous unbroken 24 hour long loop of time code Also the Loop Start Time need not be smaller than the Loop End Time Time code rolls over at 23 59 59 29 so the End Time will be reached eventually Mute Behavior If the MUTE bit is set one then the SMPTE output is muted Time code can continue to be generated internally but the output does not send the code It is as if the cable has been unplugged If the MUTE bit is clear zero then the SMPTE output sends whatever time code is being produced internally Dropout Tolerance Only the SMPTE reader uses this word It may be set to any value when generating time code the module will ignore it entirely Using the Module as a SMPTE Generator 13 Controlling the Generator 14 The 1756 Show I O generator is entirely controlled by words in the PLC Output File See the Module I O Space chapter for a diagram of the Output File Note The 1756 Show I O samples the control bits once per frame Pulses of less than 33 milliseconds will not activate the module properly Setting the Current Time Whenever the SET bit transitions from a zero to a one the SMPTE time in the Set Time words will be loaded into the SMPTE generator s output The load occurs at the n
12. as an additional track of a multi track audio recording This is exactly the technique that was standardized in 1981 by the Society of Motion Picture and Television Engineers SMPTE and subsequently adopted by the European Broadcast Union EBU The complete standard was published as ANSI V98 12M 1981 and is generally known as the SMPTE EBU Longitudinal Time Code or more simply SMPTE Time Code To achieve film like editing capability SMPTE Time Code represents time in hours minutes seconds and frames The common frame rates are 24 frames per second for film work 25 frames per second for European television 30 frames per second for NTSC black and white television and 29 97 frames per second for NTSC color television A typical SMPTE readout looks like 02 28 35 15 indicating 2 hours 28 minutes 35 seconds and 15 frames Welcome 1 Welcome SMPTE Time Code is often used to synchronize various elements of a complex presentation Equipment such as film projectors video sources audio systems lighting consoles and motion controllers can read the time code to remain at the proper point in the show at all times The 1756 Show I O brings the ability to read and generate SMPTE EBU time code to the Allen Bradley ControlLogix family of programmable logic controllers The module is compatible with all processors in the ControlLogix family including the Logix5550 or Logix5555 processors Technical Support You can obtain information abou
13. ceived code s frame edge 5 If the incoming code has dropped out advance the internal generator by one frame 6 If the signal loss has lasted longer than the dropout tolerance stop the internal generator 7 Make the current internal time and frame rate available to the PLC through the Input File 8 Indicate external lock and internal generate status to the PLC through the Input File Configuring the Reader 20 The 1756 Show I O reader regenerator is entirely controlled by words in the PLC Output File See the Module I O Space chapter for a diagram of the Output File Operating Mode When the MODE bit is set one the module will generate SMPTE time code internally When this bit is clear zero the module will read and regenerate external SMPTE time code Dropout Tolerance If incoming SMPTE time code drops out or becomes corrupt the 1756 Show I O will flywheel or self generate time code to cover the gap The DROPOUT TOLERANCE word sets how many frames of self generation are allowed before the unit stops self generating and goes IDLE A setting of zero frames selects infinite tolerance the unit will never stop self generation Using the Module as a SMPTE Reader Frame Rate The SMPTE frame rate is automatically determined from the incoming time code The three bit Frame Rate field in the PLC Output File is ignored Set Time Loop Start Time Loop End Time These words are ignored by the SMPTE reader Set Bit
14. ding bit in the error code word to be set one For example if the Loop End Time Minutes byte in the Output File contains a 63 which is an invalid number of minutes then bit 9 of the error code word in the Input File will be set Invalid entries in the Output File are treated as 1f the entries were zero Using the Module as a SMPTE Generator Typical Applications amp Sample Rungs In this example the 1756 Show I O generates a short section of time code under the control of two external inputs to the PLC The PLC includes a Logix5555 processor the Alcorn McBride 1756 Show I O module in Slot 1 a Diagnostic DC Output Module 1756 OB 16D in Slot 2 and a Diagnostic DC Input Module 1756 IB 16D in Slot 3 When the PLC runs through the main program it copies the local tag information to the I O space of the 1756 Show I O It also copies the I O Space of the 1756 Show I O to the local tag information viewable by the processor This should occur once per scan In the example below rung 2 energizes the 0 output of the DC Output card whenever the frames equal 13 SMPTE o dum Z 9 The next steps in configuring the card for SMPTE Generation involve setting the Set Time Set Hours Set Minutes Set Seconds Set Frames by moving the proper values into these output words on the card Once the locations are filled 1t may be necessary to set a Loop Start Time and a Loop End Time if you application requires it
15. e Align the module circuit board with the card guides in the chassis Gently push the module in until it is firmly seated with the retaining clips engaged at the top and bottom Removing the Module Press the retaining clips at the top and bottom of the module and slide the module straight out of the chassis Wiring the Module Attention Never wire any module while power is applied The 1756 Show I O uses a Removable Terminal Block RTB The module can accommodate Allen Bradley part number 1756 TBNH A The module wiring terminals accept two wires per terminal maximum of 14 AWG or smaller stranded wire Maximum screw torque is 8 in lb The module terminal block is removable Simply unscrew the upper right and lower left release screws and pull the entire terminal block straight out When replacing the terminal block alternate the tightening of the release screws to avoid cracking the block Maximum screw torque is 8 in Ib SMPTE Input When the 1756 Show I O is used to read external time code the signal is connected to this input The input is transformer balanced with a 600 ohm characteristic input impedance and can accept signals from 2 Vpp to 5 Vpp Connect the positive drive to the terminal labeled SMPTE IN Pin 2 and the negative drive to the terminal labeled SMPTE IN Pin 4 There is no terminal for the cable s shield it should be connected to the chassis ground at the other end of the cable SMPTE Out
16. es SINT Decimal Frame Sequence SINT Decimal Lock Flag BOOL Decimal Generate Flag BOOL Decimal Drop Flag BOOL Decimal Reserved Flag 3 BOOL Decimal Reserved Flag 4 BOOL Decimal Reserved Flag 5 BOOL Decimal Reserved Flag 6 BOOL Decimal Reserved Flag 7 BOOL Decimal SetHours_error BOOL Decimal SetMinutes_error BOOL Decimal SetSeconds_error BOOL Decimal SetFrames_error BOOL Decimal LoopStartHours_error BOOL Decimal LoopStartMinutes_error BOOL Decimal LoopStartSeconds_error BOOL Decimal LoopStartFrames_error BOOL Decimal LoopEndHours_error BOOL Decimal LoopEndMinutes_error BOOL Decimal LoopEndSeconds_error BOOL Decimal LoopEndFrames_error BOOL Decimal Reserved_error_12 BOOL Decimal Reserved_error_13 BOOL Decimal Reserved_error_14 BOOL Decimal Reserved_error_15 BOOL Decimal 26 Appendix A Module I O Configuration Tables Appendix A Module I O Configuration Tables 27
17. ext frame edge so the time can be altered while the generator is running or while it is idling Any invalid entries such as minutes greater than 59 will be treated as if the entry were zero An error bit will be set in the Input File to highlight the problem field Starting the Generator Whenever the RUN bit transitions from a zero to a one the generator switches from IDLING to RUNNING If the generator is already running the rising edge on the RUN bit has no effect Stopping the Generator Whenever the STOP bit transitions from a zero to a one the generator switches from RUNNING to IDLING If the generator is already idling the rising edge on the STOP bit has no effect Using the Module as a SMPTE Generator Monitoring the Status of the Generator The 1756 Show I O generator communicates its status to the PLC through the Input File See the Module I O Space chapter for a diagram of the Input File Current Time The current output SMPTE time code is always available through four words in the PLC Input File Word 0 hours will always be between 0 and 23 inclusive Word 1 minutes will always be between O and 59 inclusive Word 2 seconds will always be between O and 59 inclusive Word 3 frames will always be between 0 and 29 inclusive Note Word 3 frames can change 30 times per second This could impact your programming technique if your program s scan time exceeds 33 milliseconds Current Frame Rate The lo
18. ime contained in the Output File When the current time reaches the Loop End time the generator will automatically jump to the Loop Start time or halt depending on the setting of the Loop bit The jump can be disabled by simply setting the Loop Start time equal to the Loop End time In this case the generator will either keep running or stop at the Loop End Time depending on the setting of the Loop bit The output time code is always available to the PLC through the Input File The PLC can use this information to trigger execution of rungs or to reload the SMPTE generator at a specific time to create a controlled jump in the time code output Using the Module as a SMPTE Generator 11 The SMPTE generator follows a simple process to generate time code Each frame the module performs these tasks 1 Convert the current time to a string of 80 bits and if the generator is not muted send those bits out the SMPTE output If the STOP bit has changed from a zero to a one switch the generator from RUNNING to IDLING If the RUN bit has changed from a zero to a one switch the generator from IDLING to RUNNING If the SET bit has changed from a zero to a one replace the current time with the user s new time code otherwise add one frame to the current time 1f running or leave the current time unchanged if idling If the current time matches the Loop End time replace the current time with the Loop Start Time if the Loop bit is set one
19. ing code is not a drop frame code then this bit will be clear Error Codes The bits in the error code word indicate invalid entries in the Output File time fields The SMPTE reader does not produce any additional error codes See the Generator chapter for a complete description of the error codes Using the Module as a SMPTE Reader Typical Applications amp Sample Rungs In this example the 1756 Show I O generates a short section of time code under the control of two external inputs to the PLC The PLC includes a Logix5555 processor the Alcorn McBride 1756 Show I O module in Slot 1 a Diagnostic DC Output Module 1756 OB 16D in Slot 2 and a Diagnostic DC Input Module 1756 IB 16D in Slot 3 When the PLC runs through the main program it copies the local tag information to the I O space of the 1756 Show I O It also copies the I O Space of the 1756 Show I O to the local tag information viewable by the processor This should occur once per scan In the example below rung 2 energizes the 0 output of the DC Output card whenever the frames equal 13 The next steps in configuring the card to Read SMPTE involve the following Set the Mode bit to O to Read SMPTE Mode 1 is Generate SMPTE 2 Set the Dropout Tolerance if required 3 Set the Run bit to enable the card to Read SMPTE so it can read once the SMPTE source has started For further information on how to set the card up for SMPTE generation please
20. put When the 1756 Show I O is used to generate or regenerate time code the signal comes out of this output The output is transformer balanced to drive a 600 ohm load and can output signals from 2 Vpp to 4 Vpp as selected by switch SW1 Connect the terminal labeled SMPTE OUT Pin 6 to the positive drive and the terminal labeled SMPTE OUT Pin 8 to the negative drive There is no 4 Installing the 1756 Show 1 0 terminal for the cable s shield it should be connected to the chassis ground at the other end of the cable DMX Input Not currently implemented DMX Output Not currently implemented Midi Input Not currently implemented Midi Output Not currently implemented Installing the 1756 Show I O Please contact Alcorn McBride for further details Please contact Alcorn McBride for further details Please contact Alcorn McBride for further details Please contact Alcorn McBride for further details Module Setup Module Pinout Pin Description Number 1 Ground 2 SMPTE Input 3 Ground 4 SMPTE Input 5 Ground 6 SMPTE Out 7 Ground 8 SMPTE Out 9 Ground 10 Midi In Not currently Implemented 11 Ground 12 Midi In Not Currently Implemented 13 Ground 14 Midi Out Not Currently Implemented 15 Ground 16 Midi Out Not Currently Implemented 17 DMX Not Currently Implemented 18 DMX No
21. remains good This means that each frame must contain 80 good SMPTE bits and also the time code must be rolling forward one frame at a time or must be idling no change in frame number If the incoming time code becomes corrupted the internal generator will continue to produce time code through the dropout The theory is that when good external code returns the internal generator will still be in sync the bad portion of the signal has been effectively eliminated If the external SMPTE returns and it does not match the internal generator the internal time code will be locked to the external code after two consecutive valid frames arrive The dropout tolerance governs how long the internal generator will function in the absence of good external time code If the external code drops out for more frames than the dropout tolerance setting the internal generator goes into idle until good external code is restored Using the Module as a SMPTE Reader 19 SMPTE Reader The regenerated time code is always available to the PLC through the Input File The PLC can use this information to trigger execution of rungs The SMPTE reader performs the following tasks each frame 1 Receive and decode incoming SMPTE bits 2 Verify that the received code matches the previously received code or is one frame greater than the previously received code Automatically detect the frame rate of the incoming code Lock the internal SMPTE generator to the re
22. t Currently Implemented 19 N C 20 N C Installing the 1756 Show I O Module I O All communications with the 1756 Show I O takes place through the Output and Input Data Files The module can be configured manually or for ease of setup you can use the ACD file that is included on disk or from www alcorn com as a quick reference Module Configuration The 1756 Show I O module is configured as a Generic 1756 Module If you are using the existing ACD file you can base your program from this file and use this configuration If you would like to configure the module manually it is necessary to Add a New Module All Configuration is done using RSLogix5000 1 Right Click on the I O Configuration and choose New Module 2 Select the 1756 MODULE Generic 1756 Module module type 3 In the first configuration screen enter the information as seen below Molde Properties Local 1756 MODULE 1 1 Gensi l Connection Hocids Into Gackolans Type SEHOQULE Genero 175 Module Parent Local Cennection Possrmainrs open Ealarce akom THE SMPTE boom 1756 5HPTE kr sja irradia Module I O 7 4 Inthe Connection window modify the Requested Packet Interval RPI to 30 0 ms as seen below FE Module Pro parties Latoti 11758 MOOULE i i Berend Corrector culo inde Bachatara Br t Pal nl AA ie 12 750 di AAA Plaga Puit Da Corina 1 Lonrercian F ahr hie n Han Mach lead F ma 5
23. t specifying installing configuring and programming your Alcorn McBride 1756 Show I O from several sources For Contact When Telephone Support 407 296 5800 M F 9am 6pm EST Fax Support 407 296 5801 M F 9am 6pm EST E Mail Support support alcorn com Any Time Installing the 1756 Show I O The Alcorn McBride 1756 Show I O plugs directly into a standard ControlLogix chassis The module is compatible with all ControlLogix modular processors including the Logix5550 and Logix5555 Setting the SMPTE Output Level If the module is being used to generate SMPTE time code set the SMPTE time code output level before installing the module in the chassis The 1756 Show 1 O includes one eight position switch at the edge of the circuit board labeled SW1 to select the output level measured in volts peak to peak Switch SW1 Settings 1 2 3 4 5 6 7 8 4 0 Vpp On Off Off Off Off Off Off Off 3 5 Vpp Off On Off Off Off Off Off Off 3 0 Vpp Off Off On Off Off Off Off Off 2 5 Vpp Off Off Off On Off Off Off Off 2 0 Vpp Off Off Off Off On Off Off Off Output Level Module Power Consumption The 1756 Show I O module draws a maximum of 0 420 Amps at 5 VDC The module uses 0 001 Amps at 24VDC Installing the 1756 Show l O 3 Module Setup Installing the Module in the ControlLogix Chassis Installing the Modul
24. w byte of word 1 in the Input File always contains the number 24 25 or 30 to indicate the frame sequence of the output time code For example 24 frame time code always rolls over from frame number 23 to frame number 0 No distinction is made between 23 976 and 24 frame rates or between 29 97 and 30 frame rates Locked This bit will always be clear zero when generating time code It is used only by the SMPTE reader to indicate incoming time code lock SMPTE o Lu Z O Self Generating Whenever the internal SMPTE generator is running this bit in the Input File is set one If the internal generator switches into idle mode this bit will be cleared Drop Frame If the output time code has its drop frame flag set then this bit will be set If the output code is not a drop frame code then this bit will be clear Using the Module as a SMPTE Generator 15 16 Error Codes The bits in the error code word indicate invalid entries in the Output File Error Bit Entry Set Time Hours Set Time Minutes Set Time Seconds Set Time Frames Loop Start Time Hours Loop Start Time Minutes Loop Start Time Seconds Loop Start Time Frames Loop End Time Hours Ol Ol ALT RS In Loop End Time Minutes Loop End Time Seconds Loop End Time Frames Reserved for future use Any invalid entry in the Output File will cause the correspon
Download Pdf Manuals
Related Search