VISCA Controller | VISCA Equipment |
TXD
RXD
RXD
TXD
Camera 1
RXD
TXD
Camera 2
RXD
TXD
Camera 3
VISCA network structure
Command List
Notes
•Connect the serial output from the PC to the serial input of camera 1, then connect the serial output of camera 1 to the serial input of camera 2, the serial output of camera 2 to the serial input of camera 3, and the serial output of camera 3 to the serial input of the PC. (Up to seven cameras may be connected.)
•Power on all the units connected in series.
•Mixed existence of
VISCA Communication Specifications
The basic unit of VISCA communication is called a packet. The first byte of the packet is called the header and comprises the sender’s and receiver’s addresses. For example, the header of the packet sent to the FCB series camera assigned address 1 from the controller (address 0) is hexadecimal 81H. The packet sent to the FCB series camera assigned address 2 is 82H. In the command list, as the header is 8X, input the address of the FCB series camera at X. The header of the reply
packet from the FCB series camera assigned address 1 is 90H. The packet from the FCB series camera assigned address 2 is A0H.
Some of the commands for setting FCB series cameras can be sent to all devices at one time (broadcast). In the case of broadcast, the header should be hexadecimal 88H.
When the terminator is FFH, it signifies the end of the packet.
Packet (3 to 16 bytes)
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Bit 7 Bit 6 |
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1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
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Bit 7 | Bit 6 | Bit 5 | Bit 4 | Bit 3 | Bit 2 | Bit 1 | Bit 0 |
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