Vaddio Canon VC-C50i Programmers - Manual (Page 77)

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13.17 Zoom Position 1 Request
Camera Control Command Type 1
Function To return present zoom position.
Command 00A4h
Parameter None
Length 2 byte Status
Range 00h (Wide End) ~ 80h (Tele End)
Reference •To assign zoom position by pre-assigned step value, within movable range.
•Possibly error will be within ± 1% before executing Camera Reset command
and Camera ON command or after returning camera.
Format of Control Code
d0 d1 d2 d3 d4 d5
Header Device Num Command End mark
FFh 30h 3Xh 00h A4h EFh
Answer Format
In case of No Error
d0 d1 d2 d3 d4 d5 d6 d7
Header Device Num Error Code Zoom Position End mark
FEh 30h 3Xh 30h 30h s0 s1 EFh
⇓
Present position indicates in hexadecimal 2 figures and its ASCII code is status value.
Example:
s0 s1
64 ⇒ 40h ⇒ 34h 30h
In case of Error
d0 d1 d2 d3 d4 d5
Header Device Num Error Code End mark
FEh 30h 3Xh e0 e1 EFh
⇓
Error Flag indicates in hexadecimal 2 figures and returns ASCII value.
Example: e0 e1
In case of Busy :
00010000B ⇒ 10h ⇒ 31h 30h
In case of Mode Error : 10010000B ⇒ 90h ⇒ 39h 30h
Condition of Error flag to be set
Busy •In process of camera initializing operation by Camera Reset
command, etc.
•In case of executing Preset Move command
Mode Error •Not in status of Camera ON.
•Not in status of Host Control Mode.