Hitachi CP-A221N - Page 204

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Reply Data format
The connection ID (the data is same as the connection ID data on the sending
data format) is attached to the RS-232C commands reply data.
<ACK reply>
Reply
Connection
ID
0x06 1 byte
<NAK reply>
Reply
Connection
ID
0x15 1 byte
<Error reply>
Reply Error code
Connection
ID
0x1C 2 bytes 1 byte
<Data reply>
<Projector busy reply>
<Authentication error reply>
Reply Data
Connection
ID
0x1D 2 bytes 1 byte
Reply Status code
Connection
ID
0x1F 2 bytes 1 byte
Reply
Authentication
Error code
Connection
ID
0x1F 0x04 0x00 1 byte
7. Other Functions
7.4 Command Control via the Network (Continued)