Справочник Пользователя для FARGO electronic 900
Confidential, the whole present document is the sole property of Fargo Telecom (Asia) Ltd.
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5. I/O TRIGGERED AT COMMAND
This feature making use of the Fargo Maestro Input/Output port as a sensor. If the signal to the port
match the pre-defined condition a stored AT command will be executed.
match the pre-defined condition a stored AT command will be executed.
User can use AT+IOAT command to set the condition and store AT command to be executed.
5.1 Description of the operation
Wiring Diagram :
1. When the I/O port is connected to high 3V signal,
Switch closed : logic level high
Switch opened : logic level low.
Switch opened : logic level low.
2. The switch can be placed as a triggering device, e.g. to detect door opening.
3. According to the setting of AT+IOAT command, the stored AT command will be executed either
I/O signal from high to low, or from low to high :
When set as low-to-high triggering:
I/O port
I/O port volatge
time = T
Start counting time when
a low to high signal
changed detected
a low to high signal
changed detected
when period of high signal
reach the Threshold value
the AT command will be
executed
reach the Threshold value
the AT command will be
executed