JVC RS-232C - Manual (Page 15)

JVC D-ILA Projector Remote Control Guide
Page 15 of 25
Acknowledgement Response Return Codes - Basic
In most installations, it will normally be sufficient just to send a command to the projector and
assume that the projector will carry it out requested. In some installations, there may be a
requirement to confirm that the projector has carried out the command before continuing.
This is particularly important when sending multiple commands. It is possible to check if the
projector has carried out a command by monitoring the Acknowledgement Response Return
Code returned by the projector. The projector will return an Acknowledgement Response
Return Code for any valid command that it receives.
The general format of the Acknowledgement Response returned from the projector is:
06 89 01 CC CC 0A - Where CC CC is the first 2 bytes of the command that was originally
sent to the projector (not including the 21 89 01).
Taking the Power On command from page 3 as an example, to switch the projector power
on, send to the projector:
21 89 01 50 57 31 0A
If the Power On Command completes successfully, the projector will return:
06 89 01 50 57 0A
This Acknowledgement Response format is the same for all of the commands listed above.
The Acknowledgement Response Return Codes for all of the commands listed on pages 3-
13 (assuming the command is successful) are as follows:
Function Acknowledgement Response
Power On/Off 06 89 01 50 57 0A
Input Changed 06 89 01 49 50 0A
Test Pattern On/Off 06 89 01 54 53 0A
Gamma Table Changed 06 89 01 47 54 0A
Gamma Value Changed 06 89 01 47 50 0A
Remote Control Emulation Command (all commands) 06 89 01 52 43 0A
Test (Null Command - to check communication) 06 89 01 00 00 0A
The list above includes a Test (null) response. This doesn’t actually do anything, but it is
useful to check that the controller is communicating with the projector before sending any
real commands. This should be used with the Test Command shown on page 6.
To use the test command, send to the projector:
21 89 01 00 00 0A
Assuming the projector is connected to the PC or controller correctly, it will respond with:
06 89 01 00 00 0A
The projector will respond whether it is in Standby or Powered On.