4VPL-PX15
DATA
When the command is SET or REPLY, value of the specified item is set. When the command is GET or
ACK, 0000h is set. For details, refer to Appendix of the PROTOCOL MANUAL.
CHECKSUM
CHECKSUM is the logical OR of ITEM NUMBER, COMMAND and DATA.
END CODE
This is fixed to 9Ah.
2-3. Data Flow
Data flow of the PJCP is shown below.
Fig. 4 Processing procedure of the command
1Command is sent from the control application.
2The PJ Talk sends the received command to PJ Comm.
3The PJ Comm sends the command to the main CPU and receives the execution result.
If no response is returned for 30 seconds or more from the main CPU, the PJ Comm executes the
time-out processing.
4The PJ Comm sends the received command to the PJ Talk.
5The PJ Talk sends the execution result of the command.

2-3-1. Note on Installation

When using the control application, it must send the next command after receiving the response from the
PJ Talk for the previous command.
1
2
3
4
5
Projector PC
Control
Application
Windows CE
PJ Talk
PJ Comm
UART
Main CPU