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Command List
VISCA Communication
Specifications
VISCA packet structure
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-
EX780S/EX780SP camera assigned address 1 from the
controller (address 0) is hexadecimal 81H. The packet
sent to the camera assigned address 2 is 82H. In the
command list, as the header is 8X, input the address of
the camera at X. The header of the reply packet from
the camera assigned address 1 is 90H. The packet from
the camera assigned address 2 is A0H.
Some of the commands for setting 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.
Command and inquiry
● Command
Sends operational commands to the FCB-EX780S/
SP.
● Inquiry
Used for inquiring about the current state of the
FCB-EX780S/SP camera.
Command Packet Note
Inquiry 8X QQ RR ... FF QQ
1)
= Command/Inquiry,
RR
2)
= category code
1)
QQ = 01 (Command), 09 (Inquiry)
2)
RR = 00 (Interface), 04 (camera 1), 06 (Pan/Tilter), 07 (camera 2)
X = 1 to 7: FCB-EX780S/SP address
Packet (3 to 16 bytes)
Message (1 to 14 bytes)
Header
Byte 1 Byte 2 Byte 3
Bit 7
(MSB)
Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
(LSB)
10
FF
Bit 7
(MSB)
Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
(LSB)
11111111
Sender’s
address
Receiver’s address
Terminator