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6. Various setting via serial communication
This camera is not equipped with the substantial switches. Setting parameters for shutter speed, gain, offset or operational mode
can be manipulated in a manner to directly provide serial communication command to the camera using serial communication
software (such as
“FCTool”).
(6-1) Operation setting register
Setting of camera operation is performed by writing numerical values or status of flag onto the register on the memory inside the
camera. It can confirm or change the setting by using serial communication command.
These registers are divided into two main groups, the registers which is in the saving area of each of A to F six program pages
(Program page items) and the registers which is in an common area independent from the program pages (Configuration items).
[Operational mode setting-related registers ]
※
EXP_ MAX: The maximum value which is possible to directly designate as a shutter speed. In this camera(FC2600CL),
EXP_ MAX(Maximum value) is
“H’023C”(=D’0572) for the high speed shutter(QUAD/DUAL) , “H’0478”(=D’1144) for the high
speed shutter(SINGLE), and
“H’0032” for the low speed shutter.
(6-2) How to set Shutter speed
The shutter speed is determined mainly by the set position
“0” to ”9” of the (hypothetical) shutter switch.
Refer to Table 5-5
“Setting value of shutter speed” for the shutter speed corresponding to each set position.
● The shutter speed setting by the serial communication command
The shutter speed setting is done by inputting the serial communication commands as this camera is not equipped
with the substantial shutter switch.
The shutter speed setting is divided into the following three categories.
Setting method of shutter speed
Command used
Remarks
Shutter speed setting
Direct designation of shutter switch position
Command
“WSSW” Common to page A to F
External designation of shutter switch setting
Command
“S”
Separately set in page A to F
External value setting of shutter speed
Command
“S”
Separately set in page A to F
[Designation of shutter switch position]
It can be changed to the shutter speed prescribed in Table 5-5
“Setting value of shutter speed” by designating the shutter switch
set value .
(!) This corresponds to the method of changing the shutter switch on the rear panel of the conventional camera.
●
Command
“WSSW”
Function: Command for writing the shutter switch set value (Write Shutter Switch)
Transmission from host: STX
: “WSSW” : set value : ETX
Return by camera:
STX : ACK : ETX (transaction completion), or STX : NAK: ETX (transaction rejection)
※
The
“set value” (one character: “0” to “9”) is written into shutter switch.
(Note) Set contents by this command are all lost when the power is turned off as they are not written into EEPROM
(nonvolatile memory) by this command. Execute another command
“SSSW”(Save Shutter Switch) if it is needed to
save the set contents into EEPROM.
Storage area (Register)
Remarks
Range of setting values
Program page items
(Saved
in
each
of
program pages)
※
Applied to page A to F
Flag register (FR)
Various operation mode setting
16 bit
Gain set value
MGC set value
Gain correction value
MGC(B,C,D) set value
Offset set value
Offset set value
Offset correction value
Offset(B,C,D) correction value
Direct designated value of shutter speed
Externally designated value of shutter speed
0 to
※
EXP_ MAX
Electronic shutter table
Shutter value corresponding to 0 to 9
0 to
※
EXP_ MAX
×
10sets
Configuration items
(Saved in common area)
Configuration register (CR)
Various operation mode setting
32 bit
Hypothetical shutter switch
Set value of shutter switch
0 to 9
Hypothetical mode switch
Set value of mode switch
A to F
Set value of VSUB voltage
Saved in numerical number
0 to 255
[Explanation] Vsub voltage
Vsub voltage is the bias voltage (substrate voltage) that serves to control the blooming effect (resulting in blur or running image
at a saturating area) that arises from excessive light getting into CCD.
If a high Vsub voltage is set, the blooming effect can be reduced, although an excessively high voltage leads to a narrower
operation range of CCD because it is associated with a decrease in the saturating voltage of the CCD output.
It is appropriately set before shipment because the optimum Vsub voltage varies by CCD.
