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7-14
7-8. VISCA Communications Examples
Network initialization (The receiving data is for when 3 VISCA devices are connected.)
Sending
Receiving
Function
88 01 00 01 FF
Clear message (broadcast)
88 01 00 01 FF
Reply to Clear message
88 30 01 FF
Address message (broadcast)
88 30 04 FF
Reply to Address message (broadcast)
The 3rd byte of the reply to an address message is the number of connected devices plus 1. In this example, three devices are connected, so this
byte is 04.
Setting the focus position of the first PCS-C150/C150P to 0105H.
Sending
Receiving
Function
88 01 04 48 00 01 00 05 FF
Focus Direct command
90 41 FF
ACK of Focus Direct command
90 51 FF
Focus Direct command completed
Setting the focus position of the first PCS-C150/C150P to 0105H.
Sending
Receiving
Function
81 01 04 07 02 FF
Zoom Tele command
90 41 FF
ACK of Zoom Tele command
90 51 FF
Zoom Tele command completed (zoom tele starts)
81 01 04 07 00 FF
Zoom Stop command
90 41 FF
ACK of Zoom Stop command
90 51 FF
Zoom Stop command completed (zoom tele stops)
CAM_Zoom Tele/Wide and CAM_Focus Far/Near work until Camera_Zoom Stop, Camera_Focus Stop or other command is sent. CAM_Zoom
Tele/Wide and CAM_Focus Far/Near can not be sent simultaniousely.
Inquiry about whether AF is ON or OFF, the position of zoom and the position of focus.
(In case it is inquired continually)
Sending
Receiving
Function
81 09 04 47 FF
ZoomInq command
90 41 FF
ACK of ZoomInq command (socket 1)
81 09 04 38 FF
AFModeInq command
90 50 02 FF
Auto Focus Mode
81 09 04 48 FF
FocusInq command
90 42 FF
ACK of FocusInq command (socket 2)
90 51 00 02 01 0E FF
Zoom Position 021EH (socket 1)
90 52 00 01 00 05 FF
Focus Position 0105H (socket 2)
In case of Inquiry command, it might take around 0.5 second to receive the reply after the command is sent.
In case of sending the second command before receiving the first reply, ACK socket number and the completion message socket number
should be checked.
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