USER MANUAL - Hatteland Display AS
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1. lt C e e e e o o o J gt e o o o 0 e Ld o Serial Communication Control Interface SCOM Applies for redesigned Series 1 Maritime Multi Display MMD product range User Manual SCOM MMD Series 1 Doc Id INB100018 3 Rev 1 Created 6542 363 Approved 6542 Please visit www hatteland display com for the latest electronic version of this manual Hatteland Display AS Amsosen N 5578 Nedre Vats Norway Tel 47 5276 3700 info hatteland display com www hatteland display com Copyright 2009 Hatteland Display AS Aamsosen N 5578 Nedre Vats Norway Information in this manual is copyrighted to the respective owners All rights are reserved by Hatteland Display AS This information may not in whole or in part be copied photocopied reproduced translated or reduced to any electronic medium or machine readable form without the prior written consent of Hatteland Display AS The products described or referenced herein are copyrighted to the respective owners The products may not be copied or duplicated in any way This documentation contains proprietary information that is not to be disclosed to persons outside the user s company without prior written consent of Hatteland Display AS The copyright notice appearing above is included to provide statutory protection in the event of unauthoriz2. Unit Serial Number SNB This query is sent to the unit in order to identify the unit serial number No data shall be sent with this query The unit will reply to this command with an ACK attention code The DATA field will be set to an text string to indicate the specified Serial Number e g 12345 Examples Command Display Serial Number Acknowledge Type Model Number 12345 Communication Interface 12 INB100038 1 Rev 2 IND100084 12 HATTELAND Serial Communication SCOM Interface Unit Type Model Number TYP This query is sent to the unit in order to identify the unit type by its model number part number No data shall be sent with this query The unit will reply to this command with an ACK attention code The DATA field will be set to an text string to indicate the specified Type Model Number e g JH23TO01MMD A1 Examples Command Type Model Number Acknowledge Type Model Number JH20T03 Unit ID Model Version Number VER This query is sent to the unit in order to identify unit type by a preassigned code and establish the version of the serial communications interface software No data shall be sent with this query Any future revisions such as additions or changes to the commands or data fields shall increment the unit Version Number The unit will reply to this command with an ACK attention code The DATA field has a unique 1 byte unit model code The next 2 bytes shall contain ma
3. Elapsed Time Counter ETC The unit features an elapsed time counter which counts the total number of hours that the unit has been switched on The ETC command can be sent to the unit to acquire the elapsed time in hours No data shall be sent with this command The unit will reply to this command with an ACK attention code The DATA field will be set to a three byte string where the most significant byte is transmitted first The ETC has a limit on maximum 298 261 hours equivalent to 34 years When this number is reached the ETC will stop counting and the ETC command will always reply with maximum number of hours Examples Query ETC Answer two hours elapsed time Manufacturer ID MAN This command is sent to the unit to request Manufacturer ID No data shall be sent with this command The unit will reply to this command with an ACK attention code The DATA field indentify the manufacturer in a text string Examples Query Manufacturer ID Acknowledge Manufacturer ID JHD Unit OSD Control MCC This command gives remote access to the unit s OSD menu settings The commands are transmitted in the DATA field See the appendix for a complete list of OSD commands For future products it can not be guaranteed that all commands will still be available If the checksum is valid the unit will reply to this command with an ACK attention code where the data field contains the original command followed by acknowledge from the c
4. R value increment decrement Range 0 0 6 4 2 Reset Default 3 2 Query Graphic horizontal Oxb7 Horizontal resolution in nnn horizontal resolution resolution enquiry pixels in 3 digit hex number Graphic vertical Oxb8 Vertical resolution in lines nnn vertical resolution resolution enquiry in 3 digit hex number Communication Interface 19 IND100103 3 INB100038 1 Rev 2 HATTELAND Video Controller Interface Commands Function Command Description Acknowledge if enabled Graphic horizontal sync Oxb9 frequency Horizontal sync frequency in units of 100Hz in 3 digit hex number nnn horizontal frequency Graphic vertical sync Oxba Vertical sync frequency in nnnc vertical frequency frequency units of Hz in 3 digit hex nnn 3 digit hex number and 1 char c i or p interlace or Progressive Swap Main amp PIP PBP 0xe3 Swap Main and PIP PBP 0 fail Source 1 successful Temperature sensor Oxe4 Read Temperature Sensor nn Temperature C PIP Window Oxed Set PIP window PIP window transparency Transparency nn transparency r R Value increment decrement Range 0 0 6 4 2 Reset Default 6 4 Query OTHER COMMANDS Function Command Description Acknowledge if enabled
5. e 1 NC pins may be internally connected Do not use these without consulting Hatteland Display Communication Interface 7 INB100038 1 Rev 2 IND100084 11 HATTELAND Serial Communication SCOM Interface Data Rate The unit is configured to transmit and receive data at 9600 bits second Data Format Data shall be transmitted with no parity 8 data bits one start bit and one stop bit Message Format The basic message format shall be as follows Byte o 1 1234 15 le T LEN ATIN ADDR CMD IHCHK DATA The minimum message size is 7 bytes The maximum message size is 82 bytes consistent with 61162 1 Attention ATTN This byte is used to identify a start of message It can be one of 3 values Command ASCII BELL Acknowledge ASCII ACK Negative Acknowledge ASCII NAK A device shall send a command using the 0x07 Attention Code The unit will respond to the command with either an ACK if the command completed successfully or a NAK if the command failed Address ADDR This byte is used to specify a particular unit to receive a Command and to identify the unit responding ACK or NAK to a Command All units will support the broadcast address The factory default adress is O The Address field shall have the following values ADDR Broadcast Addressed to all units 0x00 to OxOF Address of a specific unit max of 16 units Data Length LEN This byte
6. r R available 0 41 0 31 ARGB1 Default Reset 0 41 0 32 ARGB2 Query 0x42 0x31 Composite 1 0x42 0x32 Composite2 0x42 0x33 Composite3 0x43 0x31 S video1 0x43 0x32 S video2 0x43 0x33 S video3 0x46 0x31 DVI Communication Interface 17 INB100038 1 Rev 2 IND100103 3 HATTELAND Video Controller Interface Commands Function Command Description Acknowledge if enabled Source Layout 0x9a Select source layout Query n Single PIP or PBP 0 Single default r R Reset 1 PIP 2 Query 2 PBP Video System Ox9b Set video system Query n Auto NTSC PAL SECAM 0 Auto default r R Reset 1 NTSC 2 Query 2 PAL 3 SECAM GAMMA value select 0x9d Select GAMMA value GAMMA value Value 0 1 0 default r R Reset 1 1 6 2 Query 2 2 2 Power Down DPMS Ox9f Set power down option 0 Off Option 0 1 On Off 1 On r Reset 2 Query Direct Access 0xa0 1 Set direct access 0 Brightness n Value 1 PIP size r R Reset 2 Main source 2 Query 3 Second source 4 Alpha Blend 5 Video Scaling 6 Swap 7 Test Pattern 8 No function Default Set runtime counter
7. serial address 0 to 15 n serial mode 0x31 RS232 0x32 4 wire RS485 422 0x33 2 wire RS485 Wide Screen Mode 0 9 Wide Screen Mode 1 1280x768 Selection n Reset 2 1366x768 R Query wr Setup DDC Oxdc Setup DDC 1 successful Serial Mode Query Oxdb Setting serial address amp serial mode db mn or Query mn Value m n m serial address 0 to 15 n serial mode 0x31 RS232 0x32 2 wire RS485 0x33 4 wire RS485 422 Communication Interface 21 INB100038 1 Rev 2 IND100103 3 HATTELAND Video Controller Interface Commands Commands to implement switch mount control buttons Function Command Description Acknowledge if enabled Menu button Oxf7 Menu button pressed Button equivalent Select down button Oxfa Select down button pressed Button equivalent Select up button Oxfb Select up button pressed Button equivalent Right button Oxfc Right button pressed Button equivalent Left button Oxfd Left button pressed Button equivalent Communication Interface 22 INB100038 1 Rev 2 IND100103 3 HATTELAND Revision History HATTELAND SCOM SE Communication Interface 23 IND100332 6 INB100038 1 Rev 2
8. 1 Set runtime counter value Runtime nnnnn 9 0 5 Query PIP PBP brightness 0xa2 Set PIP PBP window PIP window brightness control nn brightness r R value increment decrement Range 0 0 6 4 9 Reset Default 3 2 Query PIP PBP contrast 0xa3 Set PIP PBP window PIP window contrast control nn contrast r R value increment decrement Range 0 0 6 4 2 Reset Default 3 2 Query PIP H position 0 4 Set PIP Hpos PIP window horizontal position nnn value increment decrement r R Reset Range 0 0 0 0 6 4 7 Default 50 0 0 Query Communication Interface 18 IND100103 3 INB100038 1 Rev 2 HATTELAND Video Controller Interface Commands Function Command Description Acknowledge if enabled PIP V position 0xa5 Set PIP Hpos PIP window vertical position nnn value increment decrement r Reset Range 0 0 0 0 6 4 2 Query Default 0 0 0 PIP window size select Select PIP window size PIP window size nn Increment decrement r R Reset Range 0 0 0 A 2 Qu
9. defines the length of DATA in the message in bytes The maximum value for this field is 74 bytes The minimum value is 0 bytes Inverse Header Checksum IHCHK This is a simple 8 bit checksum of the header data message bytes 0 to 5 on which a bit wise inversion has been performed The checksum shall be initialised to 0 The 8 bit sum without carry of bytes 0 1 2 3 4 5 and 6 shall be OxFF If the unit receives a message with an incorrect checksum the unit will reply with the attention code set to NAK and no data field This does not apply to Broadcast messages in RS 485 mode in which case there will be no reply Data Field DATA The DATA field shall only be transmitted if LEN is greater than 0 This field depends on the CMD transmitted Communication Interface 8 INB100038 1 Rev 2 IND100084 12 HATTELAND Serial Communication SCOM Interface Inverse Data Checksum IDCHK These bytes shall only be transmitted if LEN is greater than O This is a simple 8 bit checksum of the data field message bytes 7 to 7 LEN 1 on which a bit wise inversion has been performed The checksum shall be initialised to 0 The 8 bit sum without carry of bytes 7 through 7 LEN inclusive shall be OxFF The receiver will reply to any message that the checksum has failed with the attention code set to NAK This requirement does not reply to broadcast messages in RS 485 for units that support it mode in which case there will be no reply Message C
10. in the ACK and NAK messages NAK messages will not be generated when an error in a Broadcast message is detected When a unit receives an incomplete message and the next byte is not received until after a time equal to the Intermessage Gap the next bytes received shall be processed to check for the start of a new command 0x07 ASCII Bell Communication Interface 14 INB100038 1 Rev 2 IND100084 12 HATTELAND Serial Communication SCOM Interface If the header checksum is valid but the first byte of the command message is not 0x07 as specified the unit may wait until after the next inter message gap to resume checking A NAK message shall not be generated If the header checksum is valid but the value of the CMD field does not equal one of the defined commands the unit shall reply by generating a NAK message as though a VER command had been received If the header checksum is valid but the value of the LEN field is greater than the maximum allowed the unit shall ignore the message A NAK message shall not be generated If the data checksum is valid but the value in the DATA field associated with a command is invalid out of range undefined etc the unit shall generate a NAK message indicating the current data value in the DATA field Additional Commands In time additional commands and corresponding data fields may be defined These additions will not conflict with the operation of the interface as defined herein Comm
11. kal k h bl 11 Potentiometer Control POT tir natantes Ea oro han nad 12 Unit Serial Number 12 Unit Type Model Number 13 Unit ID Model Version Number 13 Operational Requirements 13 Serial Message Failure sisse nnns 13 Periodic D M RA 13 Keep alive Alarm 14 Response Time 14 Individually Addressed Command Response 14 Broadcast Command Response 14 Inter essage Gap uis mate abet to YER HM 14 Unit Response and 5 5 14 3 INB100018 3 Rev 1 IND100130 27 Commands esses 15 Video Controller Interface COMMANAS 16 Revision History HATTELAND 23 4 INB100018 3 Rev 1 IND100130 27 HATTELAND Serial Communication SCOM Interface HATTELAND SCOM Control Interface This document defines the electrical interface serial data format and communication protocol of the Serial Communication Control Interface for Redesign The purpose of this interface is to enable a computer application to control one or more units Units refer to either
12. Auto setup Auto setup PC only 0 fail 1 successful Command Oxc4 nn Check whether a command is 0 not available availability available 1 available Auto calibration 5 Start auto calibration of gain of the 0 fail RGB amplifier 1 successful Soft Power On Off Oxc8 Soft power 0 soft power off o 1 off on 1 soft power query Query EVX Oxcb 0 Read EVX firmware version Version VV YY ZZ firmware version VV VO or EO VO Release version Engineering Sample YY Version Number ZZ Customer Number For version A Z Test Pattern 0 Leave test pattern display mode 0 normal display 1 Display test pattern screen 1 displaying built in test pattern Communication Interface 20 IND100103 3 INB100038 1 Rev 2 HATTELAND Video Controller Interface Commands Function Command Description Acknowledge if enabled Reset Factory Reset all parameters to default value 1 DB mn default 1 successful DB Serial Mode Query m serial address 0 to 15 n serial mode 0x31 RS232 0x32 4 wire RS485 422 0x33 2 wire RS485 Saving the user Oxd7 Saving all parameters to user 1 successful default default value Loading the user Oxd8 Loading all parameters to user 1 DB mn default default value 1 successful DB Serial Mode Query m
13. displays or panel comput ers Interface Configuration The serial interface can have different configurations selected by the OSD menu The configurations are defined as follows RS 232 One computer controls one unit no individual address 4 wire RS 485 RS 422 One computer controls max 16 units each with individual address 2 wire RS 485 Cable A cable with an overall shield terminated at the back shell should be used Communication Interface 5 INB100038 1 Rev 2 IND100084 11 HATTELAND Block Diagram gt v N a c c c c lt lt lt lt oO oO 0 5 5 5 5 Qe gt gt r Y Y N LO he N st 00 o c c Communication Interface 6 INB100038 1 Rev 2 IND100084 11 HATTELAND Serial Communication SCOM Interface Electrical Interface Electrical signals shall conform to RS 485 RS 422 or RS 232 Only Receive Data Transmit Data and Signal Ground are used The same conditions apply for both 4 wire and 2 wire and will just be referred to as RS 485 in this document Hardware handshake is only supported by loopback handshake for RS 232 The display is shipped with HATTELAND Multifunction Cable The cable have 9 way female DSUB connection for RS 232 interface RS 485 is optional Pin assignments at the unit are as shown below Pin RS232 RS422 RS 485 4 wire RS4852 wie Buzzer CTRL
14. e Acknowledge 60 Brightness Negative Acknowledge 40 Brightness Buzzer Control BZZ This command is sent to the unit to control buzzer on off if there is a buzzer present LEN one data byte Turn the buzzer off Turn the buzzer on If the data checksum is valid the unit will reply to this command with an ACK attention code The DATA field will indicate the buzzer state If an invalid data checksum was received and the message was not broadcast and RS 485 the unit will reply with a NAK attention code and the current control setting Examples Command Buzzer disable Display State DST This command is sent to the unit to control the unit on off or query the on off state of the unit LEN one data byte 0x00 Turn the unit off OxFF Turn the unit on Ox3F 2 Query the state of the unit The returned DATA field will indicate the state 0x00 Unit is off OXFF Unit is on If the data checksum is valid the unit will reply to this command with an ACK attention code The DATA field will indicate the unit sate If an invalid data checksum was received and the message was not broadcast and RS 485 the unit will reply with a NAK attention code and the current state Examples Query Display State Acknowledge Display state unit is on Acknowledge Display state unit is off Communication Interface 10 INB100038 1 Rev 2 IND100084 12 HATTELAND Serial Communication SCOM Interface
15. ed or unintentional public disclosure All other product names or trademarks are properties of their respective owners WARNING This is a class A product In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures GIT T 3 HATTELAND SCOM Control 9 Interface Configuration us caseus tutes 5 m 5 BIOK DIODAN 6 Electrical IMGT ACE i iier 7 Data RAQ MP ETE 8 NEN 8 Message ka kK KA KH kak a Ha ka a 8 uc nou p 8 Address ADDR M 8 Data Length LEN te toma ke h kak xh hil n kan k Min 8 Inverse Header Checksum 8 Data Field DATA 8 Inverse Data Checksum IDCHK sese 9 Message Commands and 9 Brightness Command EEE n ra baden dnas 9 Buzzer Control BZZ 10 Display State DST iaer iian 10 Elapsed Time Counter ETC J Lusa Aka 11 Manufacturer ID MAN 11 Unit OSD Control scu e kayan ku set
16. ement In RGB mode only 2 Query Image H position 0x86 Set image Hpos lmage horizontal position nnnn value increment decrement If Value gt 100 Value 100 r R Reset Range 0 0 6 4 9 Query Default 3 2 Image V position 0x87 Set image Vpos Image vertical position nnnn 5 7 value increment decrement If Value gt 100 Value 100 r R Reset Range 0 0 6 4 2 Query Default 3 2 Sharpness 0x8a Set sharpness Sharpness n value increment decrement r R Reset Range 0 0 0 F 9 Query Default 0 7 Manual Frequency Ox8b Set dot clock frequency Dot clock frequency PC mode only control nnnn Value increment decrement Range 0 0 O 0 2 Query 0 0 E Communication Interface 16 IND100103 3 INB100038 1 Rev 2 HATTELAND Video Controller Interface Commands Function Command Description Acknowledge if enabled Scaling Mode Set graphic image scaling Image expansion on off n mode 0 1 1 r R value 1 fill screen Reset 2 fill to aspect ratio Query 3 Anamorphic 4 Auto OSD H position 0x90 Set OSD Hpos OSD horizontal position nn
17. ery Default 0 0 Second source select Select input second Main selected nn Video source value r Reset 0x41 0x31 ARGB1 Default 2 Query 0x41 0x32 ARGB2 42 0 31 Composite1 0 42 0 32 Composite2 0 42 0 33 Composite3 0x43 0x31 S video1 0x43 0x32 S video2 0x43 0x33 S video3 0x46 0x31 DVI Colour temperature Oxb3 Select colour temperature Main selected select n value 0 9500K r R Reset 1 8000K default 2 Query 2 6500K 3 5000K 4 USER Red level for selected Oxb4 Set the level of the red Red level for selected colour colour temperature channel for the selected temperature nn colour temp r R value increment decrement Range 0 0 6 4 9 Reset Default 3 2 Query Green level for selected Oxb5 Set the level of the green Green level for selected colour colour temperature channel for the selected temperature nn colour temp r R value increment decrement Range 0 0 6 4 2 Reset Default 3 2 Query Blue level for selected Oxb6 Set the level of the blue Blue level for selected colour colour temperature channel for the selected temperature nn colour temp r
18. jor and minor version of the serial communication protocol in use Examples Command Unit Model Version Number Unit Version 1 0 Operational Requirements The following sections define the operational requirements Serial Message Failure If serial messages stop being transmitted or are corrupt the unit will remain at the last commanded brightness Periodic Messages The Brightness Command shall be transmitted to the unit at a repetition no faster than 4 Hz Communication Interface 13 INB100038 1 Rev 2 IND100084 12 HATTELAND Serial Communication SCOM Interface Keep alive Alarm The VER query can be used for keep alive alarm logic in the application software on the computer It is recommend ed to limit this function to one query per second Response Time Individually Addressed Command Response The unit will output the required response within Tr 2 5 character periods after the last byte of a command message is received 2 6ms at 9600 bit sec except as specified herein Broadcast Command Response In response to RS 485 broadcast command messages after the last byte of the command message is received all units will reply within the time period defined for Te below Further more any gap between these individual responses will be less than the Intermessage Gap defined below Te Tr Lr where Lr length of the ACK NAK message response Tr response time N 7 the total number of units As the
19. n value increment decrement If Value gt 100 Value 7 100 r R Reset If Value is not a multiple of ten it 2 Query change to less nearest multiple value Range 0 0 6 4 Default 3 2 OSD V position 0x91 Set OSD Ypos OSD vertical position nnn value increment decrement If Value gt 100 Value 100 r R Reset If Value is not a multiple of ten it 2 Query change to less nearest multiple value Range 0 0 6 4 Default 3 2 OSD Transparency 0x92 Set OSD transparency OSD transparency nn value increment decrement r R Reset Range 0 0 6 4 2 Query Default 3 2 Select menu timeout 0x93 Select menu timeout OSD menu timeout value nn value increment decrement r R Reset Range 0 0 1 E 2 Query Default 50 A Select OSD language 0x95 Select language 0 English Default n English Norwegian 1 Norwegian r R Reset 2 Chinese simplified 2 Query 3 French 4 Spanish Input Filter 0x96 Select input filter 0 Off Default n On Off 1 On r R Reset 2 Query Input main select 0x98 Select input main Main selected nn PC or VIDEO or next
20. ommands and Queries CMD The command can be one of the following values Brightness Command This command is sent to the unit to command the backlight brightness control setting The brightness value shall be sent as one byte in the DATA field A setting of 0 00 will indicate off A setting of OxFF will indicate maximum brightness Intermediate values will control brightness over the range from minimum to maximum luminance LEN one data byte After any power cycle the BRT will be set to 10096 If the data checksum is valid and the brightness was set the unit will reply to this command with an ACK attention code The DATA field in the reply shall indicate the resulting brightness control setting If an invalid checksum was received and the message was not Broadcast and RS 485 the unit will reply with an attention code The DATA field in the reply will indicate the current brightness control setting Examples If BRT is 10096 the user can adjust the brightness from 0 100956 If the BRT is set to 60 the visual brightness is set to 60 The user can adjust the brightness from 0 100 within the 60 set by BRT If the user sets the potensiometer to half the visual brightness will be 30 half of 60 If BRT is set back to 100 the visual brightness will be 50 half of 100 Command 60 Brightness Communication Interface 9 INB100038 1 Rev 2 IND100084 12 HATTELAND Serial Communication SCOM Interfac
21. ontroller as described in the appendix If the checksum is invalid and the message was not broadcast and RS 485 the unit will reply to this command with a attention code where the data field contains the original command Examples Command 5096 contrast 0x82 0 41 0x38 0x30 50 of OxFF 0x80 In ASCII 80 will be 0x38 0x30 Communication Interface 11 INB100038 1 Rev 2 IND100084 12 HATTELAND Serial Communication SCOM Interface Acknowledge 50 Contrast Potentiometer Control POT The unit may allow the backlight to be controlled by the local control potentiometer keypad mounted on the front of the unit by the remote control or by the combination of the two This command provides means to enable disable the local control LEN one data byte Disables the local control Backlight controlled only by the remote control OxFF Enables the local control Backlight is controlled by both the remote control and the local control Default Note In this setting with the BRT command at 100 the local control will have full dimming range This is the initial setting when a unit is powered on If the data checksum is valid the unit will reply to this command with an ACK attention code The DATA field will indicate the resulting control setting If an invalid data checksum was received and the message was not broadcast and RS 485 the unit will reply with a attention code and the current control setting
22. unication Interface 15 INB100038 1 Rev 2 IND100084 12 HATTELAND Video Controller Interface Commands COMMAND TABLE Commands to implement switch mount control buttons 1 byte ascii coded hex number e g parameter value of 0x1 is represented by 1 0x31 nn 2 byte ascii coded hex number e g parameter value of Ox1e is represented by 1 e E 0x31 0 4 Function Command Description Acknowledge if enabled Brightness control 0x81 Set brightness Brightness nn value increment decrement r R Reset Range 0 0 6 4 2 Query Default 3 2 Contrast control 0x82 a Set all contrast Contrast red all channels nn value increment decrement r R Reset Range 0 0 6 4 2 Query Default 3 2 Color control 0x83 Set color Color In video mode only nn value increment decrement Range 0 0 6 4 r R Reset Default 3 2 2 Query Tint control 0 84 Set tint Tint In video mode nn value increment decrement Range 0 0 6 4 r R Reset Default 3 2 2 Query Manual Phase control 0x85 Set dot clock phase Dot clock phase nn value increment decr
23. units reply in order to their address the units must be given subsequent addresses starting at zero for N to equal the total number of units If not N the highest unit address 1 The maximum Lr for each command are shown in the table below Command BRT BZZ ETC DST MAN SNB SWI SWK TMP VER u fe Ta Te Te Te w e Example For the BRT command and 8 units this corresponds to 2 5 10 9 10 8 9600 95 8 ms Inter message Gap Following an individually addressed command the next command shall not be issued until at least Tg 5 character periods after the message received At 9600 that is 5 10 9600 5 2ms Following the issue of a broadcast command message the next command shall not be issued until at least Tc Te Tg where Te is as defined for Broadcast Command response and Tg is defined above Unit Response and Addresses When individual unit addressing is supported by an installed configuration of units in a RS 485 for units that support it system a separate ACK or NAK message for each unit will be transmitted providing each unit s individual address in response to any broadcast addressed Command NAK messages will not be generated when an error in a Broadcast message is detected When individual unit addressing is not supported the unit will only respond to the broadcast address and will include the broadcast address
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