Panasonic LightPix AE20 User Manual page 121

The LightPixAE20 cannot establish communication in communication mode.
In the following cases, the LightPixAE20 cannot receive any command messages even in communication
mode.
While the LightPixAE20 is capturing images
The LightPixAE20 ignores the command message from external devices during image capturing and does
not respond to the message.
In RUN (RUN VIEW) mode
Internal Communication method
trigger
setting
OFF Send and receive data after the READY signal is restored (OFF to ON) and before a
TRIGGER signal is input from external devices or in 0.03 to 50 ms after the READY signal is
turned off. The LightPixAE20 can send and receive a command except when it executes
image capture, but you should keep in mind that the reading time will be longer during
communication.
ON When Internal trigger is on, the READY signal turns off immediately after the READY signal
restoration, so it is difficult to send and receive data at the specified READY signal ON time.
Try to sent a command from external devices to the LightPixAE20 every about 50 ms
several times until the external devices receive a response from the LightPixAE20, resulting
in increasing possibility of receiving the command.
In TEACHING mode
Internal Communication method
Trigger
Setting
ON In TEACHING mode, the LightPixAE20 is always capturing images regardless of the settings
or of an internal trigger and the READY signal keeps on. Since you cannot check when the
OFF device stops capturing images with external devices, try to send a command every about 50
ms several times until the LightPixAE20 responses to it, resulting in increasing the possibility
of receiving the command. The device cannot receive it while executing a teaching.
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