JVC DLA-RS45U Command Communication Specification for D-ILA Projectors (v1.7 f - Page 13

Command control

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4 Command control 4 Command control 4.1 NULL command In using CEDIA commands, it is used in order to confirm whether transmission is possible. It is used to confirm whether the external controller and the projector are properly connected. Command code HEX 0x00 0x00 Table 4-1 NULL CMD ASCII NULL NULL NULL command Function Parameter None Operation Reference - 4.1.1 Operation Use the command as shown in the following examples. Purpose: To confirm whether the external controller and the projector are properly connected. (1) Data is transmitted from the external controller to the projector as follows. 1: External controller → 0x21 0x89 0x01 0x00 0x00 '!'(Operation) PJ Individual:1 NULL NULL 0x0A End (2) If the external controller and the projector are connected and the projector is operating normally, the projector returns an ACK to the external controller as a NULL command response. 2: ← Projector 0x06 0x89 0x01 0x00 ACK PJ Individual : 1 NULL 0x00 NULL 0x0A End By the above exchange, it can be confirmed whether the connection and communication are normal or abnormal. 4.1.2 Reference N/A 13 / 80 PJ03220107B

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4 Command control
13 / 80
PJ03220107B
4
Command control
4.1
NULL command
In using CEDIA commands, it is used in order to confirm whether transmission is possible.
It is used to confirm whether the external controller and the projector are properly connected.
Command code
Table 4-1
NULL CMD
HEX
ASCII
Function
Operation
Reference
0x00
0x00
NULL
NULL
NULL command
°
-
Parameter
None
4.1.1
Operation
Use the command as shown in the following examples.
Purpose: To confirm whether the external controller and the projector are properly
connected.
(1)
Data is transmitted from the external controller to the projector as follows.
1: External controller →
0x21
0x89
0x01
0x00
0x00
0x0A
'!'(Operation)
PJ
Individual:1
NULL
NULL
End
(2)
If the external controller and the projector are connected and the projector is operating normally, the projector returns an ACK to
the external controller as a NULL command response.
2: ← Projector
0x06
0x89
0x01
0x00
0x00
0x0A
ACK
PJ
Individual : 1
NULL
NULL
End
By the above exchange, it can be confirmed whether the connection and communication are normal or abnormal.
4.1.2
Reference
N/A