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(4-2) Setting of various asynchronous shutter modes
● Preset shutter mode and pulse width control mode
Set the parameters and others in accordance with the following table.
Each parameter is set by serial communication commands via Ethernet in this camera.
Four kinds of modes are selectable as follows.
With H-reset
Without H-reset
(Note) When shutter switch is 0, "Continuous image output" (No shutter) is applied for the all.
(Note) For setting methods for the respective parameters of "PWC" and "HREN" → See "(6-3) How to set operation
mode".
(Note) This camera is not equipped with the substantial shutter setting switch on the rear panel. "Shutter switch"
described in this manual means setting values of hypothetical shutter switch set on the memory inside the
camera via serial communication command.
● Asynchronous shutter in H-reset mode
It is possible to select whether or not to reset (initialize) H timing (horizontal synchronization timing ) made by the
external trigger signal (Vint). (Default setting is without H-reset)
It is possible to control the timing of the exposure time with a pixel clock accuracy by setting "H-reset", when it needs
to expose at fully simultaneous time among plural cameras or to accurately control the exposure time of the camera
in pulse width control mode.
→ Refer to "10.Timing chart" for more information about detailed timing.
(4-3) Input of Vinit signal (asynchronous trigger signal)
● How to input Vinit signal
If the camera is used in the asynchronous shutter mode, the Vinit signal (asynchronous trigger signal) must be input
from the user unit.
The Vinit signal is input from Pin (4) of the "CAMERA" connector (6 pin connector) on the rear of the camera.
(Note)
Though the asynchronous trigger signal can be given by serial
communication command via GigE interface, it is not
suitable for real-time image capturing as it gets delayed
following packet forwarding.
(Note)
When the camera is in OSD menu displaying status (when
the operation indicator LED blinks in green), periodic trigger
signal continues to be supplied from internal CPU so
that OSD display is updated on regular basis.
In this state, the external trigger signal (Vint) can not
be accepted.
Turn the OSD menu to hidden status to make Vint
signal input effective.
● LED Vinit signal monitor indicator
When this camera is set in the asynchronous shutter mode, the LED indicator on the rear
panel of the camera lights up in red for one shot in response to the input of the external
trigger signal (Vinit signal).
This allows the user to confirm the state of signal input.
The red LED lights up for a certain period of time (for about 100 ms) each time for a trailing
edge of the trigger input. If a following trigger signal is input within this period, the lighting
time of the LED will be retriggered and extended.
Since the lighting of the LED responses only to the trailing edge of the trigger input, it lights
up only once for 100 ms even if the trigger input pulse duration is longer than the one shot
time of period.
(Note) The external trigger signal (Vint) is not accepted when the camera is OSD
menu displaying status (when the operation indicator LED blinks in green).
(Note) Check again the connection status of Vint signal, input status of trigger signal and
the operation setting of the camera for any mistakes, if this monitor LED is not
properly displayed.
Preset shutter
...PWC=DISABLED,HREN=DISABLED
Pulse width control ...PWC=ENABLED,HREN=DISABLED
Preset shutter
...PWC=DISABLED,HREN=ENABLED
Pulse width control ...PWC=ENABLED,HREN=ENABLED
Internal circuit
Fig. 4-2 Internal connection of Vinit signals
- 8 -
M10510B;8/58
(shutter SW=9)
(shutter SW=9)
FCxxxGE
"POW E R" - 4 (Vi nit)
Serial I/F
Gi gE
Lights up for one shot
Red LED lights up in red in response
to trigger signal input (Vinit).
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