Communication Mode Type - Panasonic GT02 Manual

1.1.2 Communication Mode Type

The general-purpose serial communication for the GT supports three types of communication modes.
Select one of them as usage.
(1) Command Response mode
The command response mode is an interactive communication mode that an external device sends a
command to the GT, and the GT sends back a response. A maximum of 63 GTs can be connected to
one external device. (A maximum of 32 units can be connected when using Matsushita C-NET adapter.)
In the command response mode, the external device has always the transmission right, and the GT only
sends back a response to a command from the external device. Therefore, the external device waits for
a response from the GT after sending a command to read the information on the switch input/data
settings of the GT.
(2) Two-Way 1 mode
In the two-way 1 mode, an external device sends a command to the GT, and the GT sends a message
for transmitting the information on the switch input/data settings. In this mode, the GT does not send
back a response for a command to the external device. (It sends back a response for a readout
command.) The external device and the GT both have the transmission right. Therefore, the external
device waits for the message transmission from the GT by interruption, etc., in order to receive a
message for transmitting the information on the switch input/data settings.
Note: As no response is returned in the two-way 1 mode, the external device cannot detect errors.
In the two-way 2 mode that the response function is available, the external device can
detect errors because no response is returned.
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