13.38 Ae Target Value Assignment; Camera Control Command Type 2 - Canon VC-C50i/VC-C50iR Programmer's Manual

13.38 AE Target Value Assignment

Function To assign target value of AE brightness.
Command 00A5h
Parameter Length
Range
Status None
Reference •The command is accepted when the exposure mode is set to AUTO or AUTO
Slow Shutter (Ver.6-08 and up).
•To brighten subject by increasing and darken subject by decreasing.
•An equivalent backlight correction of 1 aperture is obtained at 73h, 1.5
aperture at 90h, and 2 aperture at C0h.
•Default value is 48h.
•To return notification at the moment of setting command termination
notification ON, when operation terminates. Not to return notification of
AE Target Value Assignment command when Backlight Compensation
OFF and Backlight Compensation ON commands are executed during
operation. To return only notification of last assigned value command in case
of resetting another value during operation.
Format of Control Code
d0 d1
Header Device Num
FFh 30h
AE target value indicates in hexadecimal 2 figures and parameter value is its ASCII code.
Example:
Answer Format
d0 d1
Header Device Num
FEh 30h
Error Flag indicates in 2 figures hexadecimal and returns ASCII code value.
Example:
In case of No Error :
In case of Busy :
In case of Parameter Error :
In case of Mode Error :
Condition of Error flag to be set
Busy
Parameter Error In case of assigned parameter out of range.
Mode Error
3 byte, including fixed value (3Bh).
10h~FFh
d2 d3
Command
3Xh 00h
⇒
70 46h
d2 d3
Error Code
3Xh e0
00000000B ⇒ 00h ⇒ 30h 30h
00010000B ⇒ 10h ⇒ 31h 30h
01010000B ⇒ 50h ⇒ 35h 30h
10010000B ⇒ 90h ⇒ 39h 30h
•In process of camera initializing operation by Camera Reset
command, etc.
•In status of exposure mode manual.
•In status of AE Lock ON.
•In case of executing Preset Move command.
•Not in status of Camera ON.
•Not in status of Host Control Mode.

Camera Control Command Type 2

d4 d5
Parameter
A5h 3Bh
⇓
p1
⇒
34h
d4 d5
End mark
e1 EFh
⇓
102
d6 d7
End mark
p1 p2 EFh
p2
36h
e0 e1
d8