NEC X551UN, X551S, V801-TM, V651, V552-TM User Manual
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EXTERNAL CONTROL |
NEC LCD Monitor |
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Rev.3.8 |
INDEX |
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I. Application ................................................................................ |
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3 |
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II. Preparation ............................................................................... |
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4 |
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2. Connectors and wiring .................................................................... |
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4 |
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2.1 |
RS-232C Remote control ............................................................... |
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4 |
2.2 |
LAN control ........................................................................... |
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4 |
III. Communication specification............................................................... |
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3. Communication Parameter ................................................................ |
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5 |
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3.1 |
RS-232C Remote control ............................................................... |
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5 |
3.2 |
LAN control ........................................................................... |
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5 |
3.3 |
Communication timing ................................................................. |
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5 |
4. Communication Format ................................................................... |
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6 |
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4.1 |
Header block format (fixed length) ...................................................... |
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7 |
4.2 |
Message block format ................................................................. |
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9 |
4.3 |
Check code .......................................................................... |
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11 |
4.4 |
Delimiter ............................................................................ |
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5. Message type ........................................................................... |
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5.1 |
Get current Parameter from a monitor. ................................................. |
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5.2 |
"Get parameter" reply................................................................. |
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5.3 |
Set parameter........................................................................ |
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5.4 |
"Set parameter" reply ................................................................. |
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5.5 |
Commands........................................................................... |
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5.5.1 Save Current Settings. ............................................................ |
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5.5.2 Get Timing Report and Timing reply. ................................................ |
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5.5.3 NULL Message.................................................................... |
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IV. Control Commands ....................................................................... |
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6. Typical procedure example............................................................... |
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6.1. How to change the “Backlight” setting. ................................................ |
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6.2. How to read the measurement value of the built-in temperature sensors. |
..................23 |
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6.3. Operation Code (OP code) Table....................................................... |
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26 |
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7. Power control procedure ................................................................. |
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36 |
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7.1 |
Power status read .................................................................... |
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36 |
7.2 |
Power control ........................................................................ |
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8. Asset Data read and write................................................................ |
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40 |
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8.1 |
Asset Data Read Request and reply .................................................... |
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40 |
8.2 |
Asset Data write ..................................................................... |
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42 |
(1/72)
9. Date & Time read and write .............................................................. |
44 |
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9.1 Date & Time Read .................................................................... |
44 |
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9.2 Date & Time Write .................................................................... |
46 |
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10. |
Schedule read and write ................................................................ |
49 |
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10.1 |
Schedule Read ...................................................................... |
49 |
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10.2 |
Schedule Write ...................................................................... |
54 |
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11. |
Self diagnosis.......................................................................... |
64 |
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11.1 |
Self-diagnosis status read............................................................ |
64 |
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12. |
Serial No. & Model Name Read .......................................................... |
66 |
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12.1 |
Serial No. Read ..................................................................... |
66 |
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12.2 |
Model Name Read ................................................................... |
67 |
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13. |
Security Lock .......................................................................... |
68 |
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13.1 |
Security Lock Control................................................................ |
68 |
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14. |
Direct TV Chanel Read & Write .......................................................... |
70 |
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14.1 |
Direct TV Chanel Read & Reply ....................................................... |
70 |
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14.2 |
Direct TV Chanel Write & Reply ....................................................... |
71 |
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(2/72)
I. Application
This document defines the communications method for control of the NEC LCD monitor, MultiSync P402 /P462 /P552 /P702 /V422 /V462 /V551 /V651 /V322 /V652 /V552 /X461S /X551S /X401S /X463UN /X551UN /V463 /V423 /X462S /X552S /X462UNV /V801 when using an external controller.
(3/72)
II. Preparation
2. Connectors and wiring
2.1 RS-232C Remote control
Connector: 9-pin D-Sub
Cable: Cross (reversed) cable or null modem cable
(Please refer “Controlling the LCD monitor via RS-232C Remote control” on User’s manual.)
2.2 LAN control
Connector: RJ-45 10/100 BASE-T Cable: Category 5 or higher LAN cable
(Please refer “Controlling the LCD monitor via LAN control” on User’s manual.)
(4/72)
III. Communication specification 3. Communication Parameter
3.1 RS-232C Remote control
(1) |
Communication system |
Asynchronous |
(2) |
Interface |
RS-232C |
(3) |
Baud rate |
9600bps |
(4) |
Data length |
8bits |
(5) |
Parity |
None |
(6) |
Stop bit |
1 bit |
(7) |
Communication code |
ASCII |
3.2 LAN control
(1) |
Communication system |
TCP/IP (Internet protocol suite) |
(2) |
Interface |
Ethernet (CSMA/CD) |
(3) |
Communication layer |
Transport layer (TCP) |
(4) |
IP address |
* Using the payload of TCP segment. |
(Default) 192.168.0.10 |
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* If you need to change, |
(5) |
Port No. |
Please refer “Network settings” on User’s manual. |
7142 (Fixed) |
(Note)
The monitor will disconnect the connection if no packet data is received for 15 minutes.
And the controller (PC) has to re-connect to control the monitor again, after 15 minutes or more.
3.3 Communication timing
The controller should wait for a packet interval before next command is sent. The packet interval needs to be longer than 600msec for the LCD monitor.
(5/72)
4. Communication Format
Header |
Message |
Check Code |
Delimiter |
The command packet consists of four parts, Header, Message, Check code and Delimiter.
Recommended sequence of a typical procedure to control a monitor is as follows, [A controller and a monitor, two-way communication composition figure]
■ For the general command (see the part "6.3. Operation Code (OP code) Table”)
Controller |
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Monitor |
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Get Parameter |
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The controller sends command to |
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Header |
Message |
Check Code |
Delimiter |
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get a value from the monitor that |
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Get Parameter Reply |
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you want to change. |
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The monitor replies a current value |
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Header |
Message |
Check Code |
Delimiter |
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of the requested item. |
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Set Parameter |
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The controller sends commands to |
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Header |
Message |
Check Code |
Delimiter |
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set an adjusted value. |
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Set Parameter Reply
Header |
Message |
Check Code |
Delimiter |
Get Parameter 
Header |
Message |
Check Code |
Delimiter |
Get Parameter Reply
The monitor replies to the controller for confirmation.
The controller sends command to get a value for confirmation.
Header |
Message |
Check Code |
Delimiter |
The monitor replies an adjusted |
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value. |
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Save Current Setting Command 
Header |
Message |
Check Code |
Delimiter |
Save Current Setting Command Reply
Header |
Message |
Check Code |
Delimiter |
■ For the special command (see the part 7 to 14. and 5.5.2)
The controller requests to store the adjusted value to the monitor.
The monitor replies to the controller for confirmation.
Controller |
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Monitor |
Command
Header |
Message |
Check Code |
Delimiter |
Command Reply
Header |
Message |
Check Code |
Delimiter |
The control does not suitable for above fixed protocol; use the proper command for each control. Please refer section 5.5 and section 7 to 13.
The monitor replies a proper message defined for each control.
(6/72)
4.1 Header block format (fixed length) |
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Header |
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Message |
Check code |
Delimiter |
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SOH |
Reserved |
Destination |
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Source |
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Message |
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Message |
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'0' |
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Type |
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Length |
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1st |
2nd |
3rd |
4th |
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5th |
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6th |
-7th |
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1stbyte) SOH: Start of Header
ASCII SOH (01h)
2ndbyte) Reserved: Reserved for future extensions. On this monitor, it must be ASCII '0'(30h).
3rdbyte) Destination: Destination equipment ID. (Receiver)
Specify a commands receiver’s address.
The controller sets the “MONITOR ID” or “GROUP ID” of the monitor controlled in here. On the reply, the monitor sets ‘0’ (30h), always.
“MONITOR ID”, “GROUP ID” to “Destination Address” conversion table is as follows,
Monitor |
Destination |
Monitor |
Destination |
Monitor |
Destination |
Monitor |
Destination |
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ID |
Address |
ID |
Address |
ID |
Address |
ID |
Address |
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1 |
41h(‘A’) |
26 |
5Ah(‘Z’) |
51 |
73h |
76 |
8Ch |
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2 |
42h(‘B’) |
27 |
5Bh |
52 |
74h |
77 |
8Dh |
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3 |
43h(‘C’) |
28 |
5Ch |
53 |
75h |
78 |
8Eh |
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4 |
44h(‘D’) |
29 |
5Dh |
54 |
76h |
79 |
8Fh |
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5 |
45h(‘E’) |
30 |
5Eh |
55 |
77h |
80 |
90h |
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6 |
46h(‘F’) |
31 |
5Fh |
56 |
78h |
81 |
91h |
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7 |
47h(‘G’) |
32 |
60h |
57 |
79h |
82 |
92h |
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8 |
48h(‘H’) |
33 |
61h |
58 |
7Ah |
83 |
93h |
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9 |
49h(‘I’) |
34 |
62h |
59 |
7Bh |
84 |
94h |
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10 |
4Ah(‘J’) |
35 |
63h |
60 |
7Ch |
85 |
95h |
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11 |
4Bh(‘K’) |
36 |
64h |
61 |
7Dh |
86 |
96h |
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12 |
4Ch(‘L’) |
37 |
65h |
62 |
7Eh |
87 |
97h |
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13 |
4Dh(‘M’) |
38 |
66h |
63 |
7Fh |
88 |
98h |
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14 |
4Eh(‘N’) |
39 |
67h |
64 |
80h |
89 |
99h |
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15 |
4Fh(‘O’) |
40 |
68h |
65 |
81h |
90 |
9Ah |
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16 |
50h(‘P’) |
41 |
69h |
66 |
82h |
91 |
9Bh |
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17 |
51h(‘Q’) |
42 |
6Ah |
67 |
83h |
92 |
9Ch |
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18 |
52h(‘R’) |
43 |
6Bh |
68 |
84h |
93 |
9Dh |
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19 |
53h(‘S’) |
44 |
6Ch |
69 |
85h |
94 |
9Eh |
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20 |
54h(‘T’) |
45 |
6Dh |
70 |
86h |
95 |
9Fh |
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21 |
55h(‘U’) |
46 |
6Eh |
71 |
87h |
96 |
A0h |
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22 |
56h(‘V’) |
47 |
6Fh |
72 |
88h |
97 |
A1h |
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23 |
57h(‘W’) |
48 |
70h |
73 |
89h |
98 |
A2h |
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24 |
58h(‘X’) |
49 |
71h |
74 |
8Ah |
99 |
A3h |
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25 |
59h(‘Y’) |
50 |
72h |
75 |
8Bh |
100 |
A4h |
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ALL |
2Ah(‘*’) |
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Group |
Destination |
Group |
Destination |
Group |
Destination |
Group |
Destination |
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ID |
Address |
ID |
Address |
ID |
Address |
ID |
Address |
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A |
31h(‘1’) |
D |
34h(‘4’) |
G |
37h(‘7’) |
J |
3Ah(‘:’) |
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32h(‘2’) |
E |
35h(‘5’) |
H |
38h(‘8’) |
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C |
33h(‘3’) |
F |
36h(‘6’) |
I |
39h(‘9’) |
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Ex.) If you want to control a monitor that has the "ID No." as '1', specify a destination address
(7/72)
'A'(41h). If you want to control all of the monitors which are connected by a daisy chain, specify a destination address ‘ ’(2Ah).
4thbyte) Source: Source equipment ID. (Sender) Specify a sender address.
The controller must be ‘0’ (30h).
On the reply, the monitor sets the own MONITOR ID in here.
5thbyte) Message Type: (Case sensitive.)
Refer to section 4.2 “Message block format” for more details.
ASCII 'A' (41h): Command.
ASCII 'B' (42h): Command reply.
ASCII 'C' (43h): Get current parameter from a monitor.
ASCII 'D' (44h): "Get parameter" reply.
ASCII 'E' (45h): Set parameter.
ASCII 'F' (46h): "Set parameter" reply.
6th -7th bytes) Message Length:
Specify the length of the message (that follows the header) from STX to ETX. This length includes STX and ETX.
The byte data must be encoded to ASCII characters.
Ex.) The byte data 3Ah must be encoded to ASCII characters '3' and 'A' (33h and 41h). The byte data 0Bh must be encoded to ASCII characters '0' and 'B' (30h and 42h).
(8/72)
4.2 Message block format |
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Header |
Message |
Check code |
Delimiter |
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“Message |
block format” |
is allied to the |
“Message |
Type” in the “Header”. |
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Refer to |
the section 6 |
“Message format” |
for more |
detail. |
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1 Get current parameter
The controller sends this message when you want to get the status of the monitor.
For the status that you want to get, specify the “OP code page” and “OP code”,
refer to “Appendix A. Operation code table”. |
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“Message format” of the “Get current |
parameter” is as follows, |
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STX |
OP code page |
OP code |
ETX |
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Hi |
Lo |
Hi |
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Lo |
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Refer to section 5.1 “Get current parameter from a monitor.” for more details.
2 Get Parameter reply
The monitor will reply with the status of the requested item specified by the controller in the “Get parameter message”.
“Message format” of the “Get parameter reply” is as follows,
STX |
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Result |
OP code |
OP |
code |
Type |
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Max value |
Current Value |
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ETX |
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page |
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Hi |
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Lo |
Hi |
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Lo |
Hi |
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Lo |
Hi |
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Lo |
MSB |
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LSB |
MSB |
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LSB |
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Refer to section 5.2 “Get parameter reply” for more details.
3 Set parameter
The controller sends this message to change a setting of the monitor.
Message format of the “Set parameter” is as follows,
STX |
OP code |
OP |
code |
Set |
Value |
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ETX |
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page |
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Hi |
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Lo |
Hi |
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Lo |
MSB |
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LSB |
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Refer to section 5.3 “Set parameter” for more details.
4 Set Parameter reply
The monitor replies with this message for a confirmation of the “Set parameter message”. Message format of the “Set parameter reply” is as follows,
STX |
Result |
OP code |
OP code |
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Type |
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Max value |
Requested setting |
ETX |
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page |
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Value |
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Hi |
Lo |
Hi |
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Lo |
Hi |
Lo |
Hi |
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Lo |
MSB |
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LSB |
MSB |
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LSB |
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Refer to section 5.4 “Set parameter reply” for more details.
5 Command
“Command message” format depends on each command.
Usually, this “command message” is used for some non-slider controls and some special operations, such as “Save current settings”, “Get timing report”, “power control”, “Schedule”, etc. Refer to
(9/72)
section 5.5 “Commands message” for more details.
6 Command reply
The monitor replies to a query from the controller.
“Command reply message” format depends on each command. Refer to section 5.5 “Commands message” for more details.
(10/72)
4.3 Check code |
Header |
Message |
Check code |
Delimiter |
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Check code is the Block Check Code (BCC) between the Header and the End of Message except SOH.
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SOH |
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D0 |
27 |
26 |
25 |
24 |
23 |
22 |
21 |
20 |
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Reserved |
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D1 |
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Destination |
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D2 |
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Source |
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D3 |
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Type |
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D4 |
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Length(H) |
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D5 |
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Length(L) |
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D6 |
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STX |
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D7 |
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Data |
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D8 |
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ETX |
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Dn |
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Check code |
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Dn+1 |
P |
P |
P |
P |
P |
P |
P |
P |
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Dn+1 = D1 XOR D2 XOR D3 XOR ,,, Dn
XOR: Exclusive OR
Following is an example of a Check code (BCC) calculation.
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Header |
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Message |
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Check |
Delimiter |
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SOH |
Reserved |
Destination |
Source |
Message |
Message length |
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STX |
OP code |
OP code |
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Set Value |
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ETX |
code |
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Address |
Address |
type |
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page |
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01 |
30 |
41 |
30 |
45 |
30 |
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41 |
02 |
30 |
30 |
31 |
30 |
30 |
30 |
36 |
34 |
03 |
77 |
0D |
D0 |
D1 |
D2 |
D3 |
D4 |
D5 |
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D6 |
D7 |
D8 |
D9 |
D10 |
D11 |
D12 |
D13 |
D14 |
D15 |
D16 |
D17 |
D18 |
Check code (BCC) D17 = D1 xor D2 xor D3 xor … xor D14 xor D15 xor D16
=30h xor 41h xor 30h xor 45h xor 30h xor 41h xor 02h xor 30h xor 30h xor 31h xor 30h xor 30h xor 30h xor 36h xor 34h xor 03h
=77h
(11/72)
4.4 Delimiter |
Header |
Message |
Check code |
Delimiter |
Packet delimiter code; ASCII CR(0Dh).
(12/72)
5. Message type
5.1 Get current Parameter from a monitor.
STX |
OP |
code page |
OP |
code |
ETX |
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Hi |
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Lo |
Hi |
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Lo |
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1st |
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2nd-3rd |
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4th–5th |
6th |
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Send this message when you want to get the status of a monitor.
For the status that you want to get, specify the “OP code page” the “OP code”, refer to “Appendix A. Operation code table”.
1stbyte) STX: Start of Message
ASCII STX (02h)
2nd-3rdbytes) OP code page: Operation code page.
Specify the “OP code page” for the control which you want to get the status. Refer to “Appendix A Operation code table” for each item.
OP code page data must be encoded to ASCII characters.
Ex.) The byte data 02h must be encoded to ASCII characters '0' and '2' (30h and 32h). OP code page 02h -> OP code page (Hi) = ASCII '0' (30h)
OP code page (Lo) = ASCII '2' (32h)
Refer to Operation code table. (Appendix A)
4th–5thbytes) OP code: Operation code
Refer to “Appendix A Operation code table” for each item.
OP code data must be encoded to ASCII characters.
Ex.) The byte data 3Ah must be encoded to ASCII characters '3' and 'A' (33h and 41h). OP code 3Ah -> OP code (Hi) = ASCII '3' (33h)
OP code (Lo) = ASCII 'A' (41h)
Refer to Operation code table.
6thbyte) ETX: End of Message
ASCII ETX (03h)
(13/72)
5.2 "Get parameter" reply
STX |
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Result |
OP code page |
OP code |
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Type |
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Max value |
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Current Value |
ETX |
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Hi |
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Lo |
Hi |
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Hi |
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MSB |
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10th -13th |
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14th -17th |
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18th |
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The monitor replies with a current value and the status of the requested item (operation code). |
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1stbyte) STX: Start of Message |
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ASCII STX (02h) |
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2nd-3rdbytes) Result code. |
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These bytes indicate a result of the |
requested commands as follows, |
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00h: No Error. |
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01h: Unsupported operation with this monitor or unsupported operation under current condition. |
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This result code from the monitor is |
encoded to ASCII characters. |
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Ex.) The byte data 01h is encoded to |
ASCII character '0' and '1' (30h and 31h). |
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4th–5thbytes) OP code page: Operation code page. |
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These bytes indicate a replying item's OP code page. |
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This returned value from the monitor |
is encoded to ASCII characters. |
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Ex.) The byte data 02h is encoded to |
ASCII character '0' and '2' (30h and 32h). |
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Refer to the operation code table. |
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6th –7thbytes) OP code: Operation code |
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These bytes indicate a replying item's OP code. |
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This returned value from the monitor |
is encoded to ASCII characters. |
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Refer to the operation code table. |
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Ex.) The byte data 1Ah is encoded to |
ASCII character '1' and 'A' (31h and 41h). |
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8th -9thbytes) Type: Operation type code |
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00h: Set parameter |
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01h: Momentary |
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Like the Auto Setup function which automatically changes the parameter. |
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This returned value from the monitor |
is encoded to ASCII characters. |
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Ex.) The byte data 01h is encoded to |
ASCII character '0' and '1' (30h and 31h). |
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10th-13thbytes) Max. value: Maximum value which monitor can accept. (16bits) |
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This returned value from the monitor |
is encoded to ASCII characters. |
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Ex.) '0','1','2' and '3' means 0123h |
(291) |
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14th -17thbytes) Current Value: (16bits) |
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This returned value from the monitor |
is encoded to ASCII characters. |
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Ex.) '0','1','2' and '3' means 0123h |
(291) |
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18thbyte) ETX: End of Message |
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ASCII ETX (03h) |
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(14/72) |
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5.3 Set parameter
STX |
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OP code page |
OP code |
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Set Value |
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ETX |
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Lo |
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1st |
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2nd-3rd |
4th-5th |
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6th-9th |
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10th |
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Send this message to change monitor’s adjustment and so on. |
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The controller requests a monitor to change value. |
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1stbyte) STX: Start of Message |
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ASCII STX (02h) |
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2nd-3rdbytes) OP code page: Operation code page |
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This OP code page data must be encoded to ASCII characters. |
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Ex.) The byte data 02h must be encoded to ASCII '0' and '2' (30h and 32h). |
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Refer to the Operation code table. |
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4th-5thbytes) OP code: Operation code |
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This OP code data must be encoded to ASCII characters. |
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Ex.) OP code 1Ah -> |
OP code (Hi) = ASCII '1' (31h) |
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OP code (Lo) = ASCII 'A' (41h) |
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Refer to the Operation code table. |
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6th-9thbytes) Set value: (16bit) |
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This data must be encoded to ASCII characters. |
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Ex.) 0123h -> |
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1st(MSB) = ASCII '0' (30h) |
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2nd |
= ASCII '1' (31h) |
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3rd |
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4th(LSB) = ASCII '3' (33h)
10thbyte) ETX: End of Message
ASCII ETX (03h)
(15/72)
5.4 "Set parameter" reply
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Result |
OP code page |
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OP code |
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Type |
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Max value |
Requested setting |
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STX |
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Value |
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ETX |
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Hi |
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Lo |
Hi |
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Lo |
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Hi |
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Lo |
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Hi |
Lo |
MSB |
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LSB |
MSB |
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1st |
2nd-3rd |
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6th-7th |
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8th-9th |
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10th-13th |
14th -17th |
18th |
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The Monitor echoes back the parameter and status of the requested operation code. |
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1stbyte) STX: Start of Message |
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ASCII STX (02h) |
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2nd-3rdbytes) Result code |
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ASCII '0''0' (30h, 30h): No Error. |
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ASCII '0''1' (30h, 31h): Unsupported operation with this monitor or unsupported operation under |
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current condition. |
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4th-5thbytes) OP code page: Echoes back the Operation code page for confirmation. |
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Reply data from the monitor is encoded to ASCII characters. |
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Ex.) OP code page 02h -> |
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OP code page = ASCII '0' and '2' (30h and 32h) |
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Refer to Operation code table. |
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6th-7thbytes) OP code: Echoes back the Operation code for confirmation. Reply data from the monitor is encoded to ASCII characters.
Ex.) OP code 1Ah -> OP code (Hi) = ASCII '1' (31h)
OP code (Lo) = ASCII 'A' (41h)
Refer to Operation code table 8th-9thbytes) Type: Operation type code
ASCII '0''0' (30h, 30h): Set parameter
ASCII '0''1' (30h, 31h): Momentary
Like Auto Setup function, that automatically changes the parameter. 10th-13thbytes) Max. value: Maximum value that monitor can accept. (16bits)
Reply data from the monitor is encoded to ASCII characters.
Ex.) '0''1''2''3' means 0123h (291)
14th -17thbytes) Requested setting Value: Echoes back the parameter for confirmation. (16bits) Reply data from the monitor is encoded to ASCII characters.
Ex.) '0''1''2''3' means 0123h (291) 18thbyte) ETX: End of Message
ASCII ETX (03h)
(16/72)
5.5 Commands
"Command message format" depends on each command. Some commands are shown with usage. Refer to section 7 to 13.
5.5.1 Save Current Settings.
The controller requests for the monitor to store the adjusted value.
STX |
Command code |
ETX |
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'0' |
'C' |
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Send "OC"(30h, 43h) as Save current settings command.
Complete "Save Current setting" command packet as follows; ASCII: 01h-30h-41h-30h-41h-30h-34h-02h-30h-43h-03h-CHK-0Dh
SOH-'0'-'A'-'0'-'A'-'0'-'4'-STX-'0'-'C'-ETX-CHK- CR The monitor replies the packet for confirmation as follows;
SOH-'0'-'0'-'A'-'B'-'0'-'6'-STX-'0'-'0'-'0'-'C'-ETX-CHK- CR
(17/72)
5.5.2 Get Timing Report and Timing reply.
The controller requests the monitor to report the displayed image timing.
STX |
Command code |
ETX |
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'0' |
'7' |
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Send "07"(30h, 37h) as Get Timing Report command.
Complete "Get Timing Report" command packet as follows; ASCII: 01h-30h-41h-30h-41h-30h-34h-02h-30h-37h-03h-CHK-0Dh
SOH-'0'-'A'-'0'-'A'-'0'-'4'-STX-'0'-'7'-ETX-CHK- CR The monitor replies status as the following format;
STX |
Command |
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SS |
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H Freq. |
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V Freq. |
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ETX |
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'4' |
'E' |
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MSB |
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SS: Timing status byte
Bit 7 = 1: Sync Frequency is out of range. Bit 6 = 1: Unstable count
Bit 5-2 Reserved (Don't care)
Bit 1 1:Positive Horizontal sync polarity. 0:Negative Horizontal sync polarity.
Bit 0 1:Positive Vertical sync polarity. 0:Negative Vertical sync polarity.
H Freq: Horizontal Frequency in unit 0.01kHz
V Freq: Vertical Frequency in unit 0.01Hz
Ex.) When H Freq is '1''2''A''9' (31h, 32h, 41h, 39h), it means 47.77kHz.
(18/72)
5.5.3 NULL Message
STX |
Command code |
ETX |
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'B' |
'E' |
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The NULL message returned from the monitor is used in the following cases;
To tell the controller that the monitor does not have any answer to give to the host (not ready or not expected)
Following operations need a certain time for to execute, so the monitor will return this message when another message is received during execution.
Power ON, Power OFF, Auto Setup, Input, PIP Input, Auto Setup and Factory reset.
Complete "NULL Message" command packet as follows; 01h-30h-30h-41h-42h-30h-34h-02h-42h-45h-03h-CHK-0Dh SOH-'0'-'0'-'A'-'B'-'0'-'4'-STX-'B'-'E'-ETX-CHK- CR
(19/72)
IV. Control Commands
6. Typical procedure example
The following is a sample of procedures to control the monitor, these are examples of "Get parameter", "Set parameter" and "Save current settings".
6.1. How to change the “Backlight” setting.
Step 1. The controller requests the Monitor to reply with the current brightness setting and capability to support this operation. (Get parameter)
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Header |
Message |
Check code |
Delimiter |
SOH-'0'-Monitor ID-'0'-'C'-'0'-'6' |
STX-'0'-'0'-'1'-'0'-ETX |
BCC |
CR |
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Header |
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SOH |
(01h): Start Of Header |
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'0' |
(30h): Reserved |
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Monitor ID: Specify the Monitor ID from which you want to get a value. Ex.) If Monitor ID is '1', specify 'A'.
'0' (30h): Message sender is the controller.
'C' (43h): Message type is "Get parameter command". '0'-'6' (30h, 36h): Message length is 6 bytes.
Message
STX (02h): Start of Message
'0'-'0' (30h, 30h): Operation code page number is '1'-'0' (31h, 30h): Operation code is 10h (in the ETX (03h): End of Message
0.
OP code page 0).
Check code
BCC: Block Check Code
Refer to the section 4.5 “Check code” for a BCC calculation.
Delimiter
CR (0Dh): End of packet
Step 2. The monitor replies with current Backlight setting and capability to support this operation.
Header |
Message |
Check code |
Delimiter |
SOH-'0'-'0'-Monitor ID-'D'-'1'-'2' |
STX-'0'-'0'-'0'-'0'-'1'-'0'-'0'-'0' |
BCC |
CR |
-'0'-'0'-'6'-'4'-'0'-'0'-'3'-'2'-ETX
Header
SOH (01h): Start Of Header '0' (30h): Reserved
'0' (30h): Message receiver is the controller. Monitor ID: Indicate a replying Monitor ID.
Ex.) When this byte is set to 'A', the replying Monitor ID is '1'. 'D' (44h): Message Type is "Get parameter reply".
'1'-'2' (31h, 32h): Message length is 18 bytes.
Message
STX (02h): Start of Message
'0'-'0' (30h, 30h): Result code. No error.
'0'-'0' (30h, 30h): Operation code page number is 0. '1'-'0' (31h, 30h): Operation code is 10h (in the page 0). '0'-'0' (30h, 30h): This operation is "Set parameter" type.
'0'-'0'-'6'-'4' (30h, 30h, 36h, 34h): Backlight max value is 100(0064h). '0'-'0'-'3'-'2' (30h, 30h, 33h, 32h): Current Backlight setting is 50(0032h) . ETX (03h): End of Message
Check code
BCC: Block Check Code
Refer to the section 4.5 “Check code” for a BCC calculation.
Delimiter
(20/72)
CR (0Dh): End of packet
Step 3. The controller request the monitor to change the Backlight setting
Header |
Message |
Check |
Delimiter |
code |
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SOH-'0'-Monitor ID-'0'-'E'-'0'-'A' |
STX-'0'-'0'-'1'-'0'-'0'-'0'-'5'-'0'-ETX |
BCC |
CR |
Header
SOH (01h): Start Of Header '0' (30h): Reserved
Monitor ID: Specify the Monitor ID of which you want to change a setting. Ex.) If Monitor ID is '1', specify 'A'.
'0' (30h): Message sender is the controller.
'E' (45h): Message Type is "Set parameter command". '0'-'A' (30h, 41h): Message length is 10 bytes.
Message
STX (02h): Start of Message
'0'-'0' (30h, 30h): Operation code page number is 0. '1'-'0' (31h, 30h): Operation code is 10h (in the page 0).
'0'-'0'-'5'-'0' (30h, 30h, 35h, 30h): Set Backlight setting 80(0050h). ETX (03h): End of Message
Check code
BCC: Block Check Code
Refer to the section 4.5 “Check code” for a BCC calculation.
Delimiter
CR (0Dh): End of packet
Step 4. The monitor replies with a message for confirmation.
Header |
Message |
Check code |
Delimiter |
SOH-'0'-'0'- Monitor ID -'F'-'1'-'2' |
STX-'0'-'0'-'0'-'0'-'1'-'0'—'0'-'0'-'0' |
BCC |
CR |
-'0'-'6'-'4'-'0'-'0'-'5'-'0'-ETX
Header
SOH (01h): Start Of Header '0' (30h): Reserved
'0' (30h): Message receiver is the controller. Monitor ID: Indicate a replying Monitor ID.
Ex.) When this byte is set to 'A', the replying Monitor ID is '1'. 'F' (46h): Message Type is "Set parameter reply".
'1'-'2' (31h, 32h): Message length is 18 bytes.
Message
STX (02h): Start of Message
'0'-'0' (30h, 30h): Result code. No error.
'0'-'0' (30h, 30h): Operation code page number is 0. '1'-'0' (31h, 30h): Operation code is 10h (in the page 0). '0'-'0' (30h, 30h): This operation is "Set parameter" type.
'0'-'0'-'6'-'4' (30h, 30h, 36h, 34h): Backlight max value is 100(0064h). '0'-'0'-'5'-'0' (30h, 30h, 35h, 30h): Received a Backlight setting was 80(0050h) . ETX (03h): End of Message
Check code
BCC: Block Check Code
Refer to the section 4.5 “Check code” for a BCC calculation.
Delimiter
CR (0Dh): End of packet
Repeat Step 1 and Step 2, if you need to check the Backlight setting. (Recommended) Step 5. Request the monitor to store the Backlight setting. (Save Current Settings Command)
(21/72)
Header |
Message |
Check code |
Delimiter |
SOH-'0'-Monitor ID-'0'-'A'-'0'-'4' |
STX-'0-'C'-ETX |
BCC |
CR |
Header
SOH (01h): Start Of Header '0' (30h): Reserved
Monitor ID: Specify the Monitor ID which you want to store the setting. Ex.) If Monitor ID is '1', specify 'A'.
'0' (30h): Message sender is the controller. 'A' (41h): Message type is "Command".
'0'-'4' (30h, 34h): Message length is 4 bytes.
Message
STX (02h): Start of Message
'0'-'C' (30h, 43h): Command code is 0Ch as "Save current settings". ETX (03h): End of Message
Check code
BCC: Block Check Code
Refer to the section 4.5 “Check code” for a BCC calculation.
Delimiter
CR (0Dh): End of packet
(22/72)
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