43
Note
Fig. 2 shows the packet structure, while Fig. 3 shows the actual waveform. Data flow will take
place with the LSB first.
Fig. 3 Actual waveform for 1 byte
8.2.2.2 Timing Chart
As VISCA Command processing can only be carried out one time in a Vertical cycle, it takes the
maximum 1V cycle time for an ACK/Completion to be returned. If the Command
ACK/Completion communication time can be cut shorter than the 1V cycle time, then every 1V
cycle can receive a Command.
From this point, if 2 or more commands in a row are to be sent, wait for the first command (for
normal commands, an ACK or an error message, for query commands, an Inquiry Packet) to be
carried out before sending the next one.
8.2.2.3 Command and inquiry
•
Command
Sends operational commands to the PTC-200.
•
Inquiry
Used for inquiring about the current state of the PTC-200.
