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Abstracts of contents
Summary of the content on the page No. 1
PRV-LX1 RS-422A Command Protocol Manual
March 2005
Version 3.02
TP #T502201 All Rights Reserved
Table of Contents 1.0 FOREWORD..................................................................................2 2.0 COMMUNICATION SIGNAL..............................................................3 3.0 CABLING .....................................................................................3 4.0 COMMAND BLOCK FORMAT.................................................
PRV-LX1 RS-422A Protocol 1.0 Foreword The PRV-LX1 can be controlled externally using RS-422A commands. Control is applied through the REMOTE IN and REMOTE OUT D-Sub 9 connector on the rear panel. Set the RS-422A REMOTE controls through the main menu. Press the Function button on the PRV-LX1’s front panel to access the menu. Control Settings are accessed through the Setup menu. The REMOTE IN connector is used when controlling this unit with an external device. The REMOTE OUT con
Summary of the content on the page No. 4
PRV-LX1 RS-422A Protocol 2.0 Communication Signal The PRV-LX1 conforms to EIA RS-422A and includes a full duplex communication channel. The transfer speed is 38.4kb per second. Data Format: Start Bit: 1 bit Data: 8 bits Parity (ODD): 1 bit Stop Bit: 1 bit 3.0 Cabling Pin Master Slave 1 Ground Ground 2 RX- TX- 3 TX+ RX+ 4 Xmit Common Rcv Common 5 Spare Spare 6 Rcv Common Xmit Common 7 RX+ TX+ 8 TX- RX- 9 Ground Ground Page 3 of 18
Summary of the content on the page No. 5
PRV-LX1 RS-422A Protocol 4.0 Command Block Format The controlling device and the PRV-LX1 communicate through the interchange of command blocks. The bytes in each command block are assigned as follows: Data CMD-1 Data-15 CMD-2 Data-1 Checksum Count (MSD) (MAX) (LSD) 1 Byte 1 Byte 1 Byte 1 Byte 1 Byte • CMD-1/DATA COUNT CMD-1 is the upper 4 bits, DATA COUNT is the lower 4 bits • CMD-2 • DATA-1 up to DATA-N, where n is the value in data count • CHECKSUM CMD-1 Indicates th
Summary of the content on the page No. 6
PRV-LX1 RS-422A Protocol The controller must ensure that no more than a 10 msec lapse occurs between bytes in a command block. The controller must immediately stop sending data when it receives a NAK + Error Data message. The unit must wait at least 10 msec before resending the command. The controller should wait at least 10msec to receive a response from the PRV-LX1. The unit should not send another command during this time. When the controller does not receive a response from
Summary of the content on the page No. 7
PRV-LX1 RS-422A Protocol 5.0 Command Table Code Command Response 00 11 Device Type Request 12 11 xx xx Device Type 20 00 Stop 10.01 ACK 20 01 Play 10 01 ACK 20 02 Rec(ord) 10 01 ACK 20 04 Standby OFF 10 01 ACK 20 05 Standby ON 10 01 ACK 20 0F Eject 10 01 ACK 20 10 Fast Forward 10 01 ACK 20 20 Rewind 10 01 ACK 21 11 xx Jog Forward 10 01 ACK 22 11 xx yy 21 12 xx Var Forward 10 01 ACK 22 12 xx yy 21 13 xx Shuttle Forward 10 01 ACK 22 13 xx yy 21 21 xx Jog Reverse 10 01 ACK 2
Summary of the content on the page No. 8
PRV-LX1 RS-422A Protocol 6.0 Command Formats 00 11 Device Type Request PRV-LX1 Responds with a 12 11 Device Type Message containing 2 bytes of data TV System DATA 1 DATA2 NTSC F0 51 PAL F1 51 10 01 ACK PRV-LX1 sends this data when it receives a command from a Controller 11 12 NAK When a communication error is detected, the PRV-LX1 sends this command with a “1” in the following position indicating the appropriate error condition. 7 6 5 4 3 2 1 0 Framing Overrun Checksum Un
Summary of the content on the page No. 9
PRV-LX1 RS-422A Protocol 20 20 Rewind During playback or Time Shift PLAY, this command executes 192x speed Scan Reverse then pauses playback at the beginning of the title. 21 11 xx Jog Forward 22 11 xx yy Jog Forward 21 12 xx Variable Forward 22 12 xx yy Variable Forward 21 13 xx Shuttle Forward 22 13 xx yy Shuttle Forward 21 21 xx Jog Reverse 22 21 xx yy Jog Reverse 21 22 xx Variable Reverse 22 22 xx yy Variable Reverse 21 23 xx Shuttle Reverse 22 23 xx yy Shuttle Reverse
Summary of the content on the page No. 10
PRV-LX1 RS-422A Protocol 24 31 Cue Up With Data Cues the PRV-LX1 to the indicated time code and pauses. DATA – 1 DATA – 2 DATA – 3 DATA – 4 10 1 10 1 10 1 10 1 Frames Frame Seconds Second Minutes Minute Hours Hour MSD LSD MSD LSD MSD LSD MSD LSD 44 14 In Data Preset Preset the value from DATA-1 to DATA-4 to the memory. Data format is same as the format of ”24:31 Cue Up With Data” command. Using the ”44:31 Preroll” command, search to the position that is the value of Preroll
Summary of the content on the page No. 11
PRV-LX1 RS-422A Protocol 7X 20 Status Data Return all or part of the following data that corresponds to the “61:20 Status Sense” command Data MSB LSB Bit – 6 Bit – 5 Bit – 4 Bit – 3 Bit – 2 Bit – 1 # Bit – 7 Bit – 0 0 UnThread Local 1 Standby Stop Eject REW FF Rec Play Servo Tape 2 Shuttle Jog VAR Still Cue Up Lock Dir 3 4 Preroll UNTREAD: bit set when the selected drive is open LOCAL: bit set when [Operation/Control Setting/Control] is set to Local (r
Summary of the content on the page No. 12
PRV-LX1 RS-422A Protocol E2 51 21 Chapter Search (PRV-LX1 original command) The command searches to a recorded chapter number Values are 1-99 (0x01 – 0x99) DATA – 2 10 1 Chapters Chapter MSD LSD Chapter number is given by DATA-2. Available chapter numbers are from 1 to 99. E1 51 22 Chapter Mark (PRV-LX1 original command) This command inserts a chapter mark in the Title being recorded. E1 51 81 Title Number Sense (PRV-LX1 original command) The command returns the total number
Summary of the content on the page No. 13
PRV-LX1 RS-422A Protocol E3 51 72 Trimming Title Preset (PRV-LX1 original command) The command presets the trimming title number. Values are 1-255 (0x01 0x00 – 0x55 0x02) Trimming title number executed by ”E1:51:75 Trimming” command is specified by DATA-2, DATA-3, and the title number preset in the memory. Data format is the same as the “E3:51:11 Title Search” command. E5 51 73 Trimming In Preset (PRV-LX1 original command) The command presets the trimming In Point. When the unit
Summary of the content on the page No. 14
PRV-LX1 RS-422A Protocol E2 51 9F Mode Data When the unit receives the ”E1:51:8F Mode Sense” command, the current status of the unit is reported as the value of DATA-2. DATA – 2 Status of the PRV-LX1 01 During recording and Time Shift PLAY in recording mode FF Rec error 71 Executing title delete 75 Executing trimming Page 13 of 18
Summary of the content on the page No. 15
PRV-LX1 RS-422A Protocol 7.0 Procedure for Issuing Command < Example 1> is an example of playing Title 2, from the scene10minutes to 20minutes “Drive Select” and “Selecting the project” are not possible to be remotely controlled. It is possible to get total title number of current project by "E1 51 81 Title Number Sense" command in Stop condition. Total time of the title cannot be acquired directly by a remote command. However, when a title is played by remote command
Summary of the content on the page No. 16
PRV-LX1 RS-422A Protocol START 20・02 Rec 61・20 Status Sense N Rec ? E1・ 51・ 81 Title Number Sense Title = 3 E3・ 51・ 11・ 02・ 00 Title Search 61・20 Status Sense N Play (not Rec) ? Play Control 20・02 Stop Wait 1sec 61・20 Status Sense N Rec ? END is an example of playing Title 2 while recording Title 3 to HDD. On HDD Rec, it is possible to play a title other than the title being recorded when the Time Shift PLAY setting is set to Enable. “20:02 Stop” command
Summary of the content on the page No. 17
PRV-LX1 RS-422A Protocol 8.0 Product-Specific Notes 8.1 Recording Delay There is a short delay of approximately 29+/-2 frames between when the PRV-LX1 is issued a record command and the command is executed. This delay is a result of the following: Requires 12 frames for encoding system setup Execution of the command may take +2 frames Execution of the command may take–2 frames Record default offset for the LX1 is 17 frames The above delay shows the calculation of a maximum +29
Summary of the content on the page No. 18
PRV-LX1 RS-422A Protocol 8.2 Playback Delay When the PRV-LX1 is issued a play command, it experiences up to a +2 frames delay in the execution of the command. The decoding system requires 2 frames to accomplish setup. 8.3 PRV-LX1 as Recording Device When issuing a “pause” command while recording, the PRV-LX1 continues recording within the same title/clip, maintaining continuous time-code. * To issue a “pause” command the user must issue a “shuttle 0” command. This pauses the rec
Summary of the content on the page No. 19
PRV-LX1 RS-422A Protocol 9.0 Appendix Command Matrix by System Version Commands 2.04/1.03 2.51/1.03 ≥ 3.00/1.04 00 11 Device Type X X X X X X 20.00 Stop 20.01 Play X X X 20.02 Rec(ord) X X X 20.04 Standby OFF X 20.05 Standby ON X 20.0F Eject X X X 20.10 Fast Forward X X X 20.20 Rewind X X X 20.30 Preroll X 21.11 xx Jog Forward X 21.12 xx Var Forward X 21.13 xx Shuttle Forward X 21.21 xx Jog Reverse X 21.22 xx Var Reverse X 21.23 xx Shuttle Reverse X 22.
