3M 1000, Руководство пользователя

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Configuring Digital I/Os
3M Compact RFID Reader 1000 User’s Guide
79
8.4.2.
scan_trigger_timer.py
This routine monitors the I/O pin. When the pen goes high, the timer is
started and the operating mode is set to
active . While the timer is running,
I/O pin state changes are ignored. When the timer expires, the operating
mode is set to
standby . The minimum value for the timer is 10 milliseconds
(ms).
Inputs: <
pin > – (optional) Output pin number (1–4). Default is output 1.
< time> – (optional) Time, in ms for timer to run. Default is 1000 ms.
< trigger logic level > –(optional) 0 or 1. Default is trigger on 1.
Examples:
scan_trigger_timer.py
Monitors input 1, timer 1000 ms,
trigger on 1
scan_trigger_timer.py 2
Monitors input 2, timer 1000 ms,
trigger on 1
scan_trigger_timer.py 4 2000
Monitors input 4, timer 2000 ms,
trigger on 1
scan_trigger_timer.py 3 4000 0
Monitors digital input 3, timer
4000 ms, trigger on 0
8.4.3.
signal_read.py
This routine will turn on a digital output if a tag is successfully read. The
optional output pin number can be specified on the command line. If not
specified, output pin 1 is used. The output pin will remain high for
n ms,
where n is either the default of 1000 ms, or the value supplied on the
command line. Minimum value for n is 10 ms.
Inputs: < pin > – (optional) Output pin number (1–4). Default is output 1.
< time > – (optional) Time, in ms, to keep the output high. Default is
1000 ms (1 sec).
<logic level> – (optional) Logic level for digital out
On . 0 or 1. Default is 1
( On ).
Examples:
signal_read.py
Turns on output 1 for 1000 ms on tag reads
signal_read.py 2
Turns on output 2 for 1000 ms on tag reads
signal_read.py 1 5000
Turns on output 1 for 5000 ms on tag reads
signal_read.py 1 500
Turns on output 1 for 500 ms on tag reads
signal_read.py 1 800 0
Turns on digital output 1,logic level 0, for
800 ms on tag reads