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...........................................................4 5.
PRV-LX1 RS-422A Protocol 7.0 PROCEDURE FOR ISSUING COMMAND...........................................14 8.0 PRODUCT-SPECIFIC NOTES.........................................................16 8.1 8.2 8.3 8.4 9.0 Recording Delay .............................................................................................................. 16 Playback Delay ................................................................................................................ 17 PRV-LX1 as Recording Device ......
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.
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.
PRV-LX1 RS-422A Protocol 4.0 Command Block Format The controlling device and the PRV-LX1 communicate through the interchange of command blocks.
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.
PRV-LX1 RS-422A Protocol 5.0 Command Table Code Command 00 11 Device Type Request Response 12 11 xx xx Device Type 20 00 Stop 10.
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 NTSC PAL DATA 1 F0 F1 DATA2 51 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.
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.
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 Frames 1 Frame 10 Seconds 1 Second 10 Minutes 1 Minute 10 Hours 1 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.
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 Bit – 7 Bit – 6 0 Bit – 5 Bit – 4 Bit – 3 Bit – 2 Bit – 1 UnThread LSB Bit – 0 Local 1 Standby Stop Eject REW FF Rec Play 2 Servo Lock Shuttle Jog VAR Tape Dir Still Cue Up 3 4 Preroll UNTREAD: bit set when the selected drive is open LOCAL: bit set when [Operation/Control Setting/Control] is set to Local (remote command is not avail
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 Chapters 1 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.
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.
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.
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 commands (e.g.
PRV-LX1 RS-422A Protocol STA R T
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 frames +/- 2 frames delay.
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.
PRV-LX1 RS-422A Protocol 9.0 Appendix Command Matrix by System Version Commands 00 11 Device Type 20.00 Stop 20.01 Play 20.02 Rec(ord) 20.04 Standby OFF 20.05 Standby ON 20.0F Eject 20.10 Fast Forward 20.20 Rewind 20.30 Preroll 21.11 xx Jog Forward 21.12 xx Var Forward 21.13 xx Shuttle Forward 21.21 xx Jog Reverse 21.22 xx Var Reverse 21.23 xx Shuttle Reverse 22.11 xx yy Jog Forward 22.12 xx yy Var Forward 22.13 xx yy Shuttle Forward 22.21 xx yy Jog Reverse 22.22 xx yy Var Reverse 22.
PRV-LX1 RS-422A Protocol Manual Pioneer Electronics (USA) Inc.