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4.Communication procedure
4-1. Camera communications consist of receiving a four-byte command code from the PC and then
communicating a four-byte return code from the camera.
* Transmitting any of the following commands before a return code transmission will cause that command to be ignored
(unidentified)..
4-2. If the product fails to receive up to the 4th byte of data within about two seconds after receiving the 1st byte of command code from
the PC, the product will judge the status as a communication error about the reception, and transmit a return code (15 01 FF FF).
* The same is true in the case of an overrun error or framing error. About two seconds after such an error occurs, the product will
transmit a return code (15 01 FF FF).
4-3. Do not transmit a next command from the time you transmit a command code to the camera until you finish receiving a return code.
Allow for at least 50mS from the time you receive a return code until you transmit a next command.
100µS or more
1st byte
PC to camera
Camera to PC
Command
2nd byte
3rd byte
4th byte
Max 2 sec
Approx.100μS to 50mS
Return
1st byte
2nd byte
3rd byte
4th byte
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