Siemens AC75 Manual De Usuario
AC75 AT Command Set
20.8 AT^SCCNT
s
AC75_ATC_V01.002
Page 518 of 569
10/30/06
Confidential / Released
0
Activates the Start-Stop counter mode.
After setting this mode, use
parameter to start
or stop the pulse counter or to read out the measured pulses.
1
Activates the Limit counter mode and immediately starts the pulse counter.
Parameter
is mandatory for this mode.
1...65534
Number of pulses to be counted.
Parameter
applies only to the Limit counter mode and is mandatory
for this mode. Once the given number of pulses is reached, the ME sends one
single URC "
" which indicates the parameter
.
1...4294967295
Time (in milliseconds) taken to count the number of pulses specified with
Note
• Measurement accuracy: In Limit counter mode, the parameter
implies an inaccuracy <5ms.
20.8.1
Using the Pulse Counter in Limit Counter Mode
This example assumes that a 1 kHz frequency is applied at the GPIO10 pin. Limit counter mode is enabled to
request the time the pulse counter needs to count a specified number of pulses.
This example shows how to stop the Limit counter mode and close the pulse counter without waiting for the
" URC. Both methods have the same effect, it is up to you which one to use.
<mode>
(num)
<limit>
(num)
<time>
(num)
at^sccnt=1,1,1000
Open pulse counter, enable Limit counter mode, request the time
needed to count 1000 pulses.
OK
^SCCNT: 0000001047
" URC indicates the time taken to count 1000 pulses.
at^sccnt=1,1,2000
Open pulse counter, enable Limit counter mode, request the time
needed to count 2000 pulses.
OK
^SCCNT: 0000002040
" URC indicates the time taken to count 2000 pulses.
at^sccnt=1,1,10000
Open pulse counter, enable Limit counter mode, request the time
needed to count 10000 pulses.
OK
^SCCNT: 0000010043
" URC indicates the time taken to count 10000 pulses.
at^sccnt=1,1,20000
Open pulse counter, enable Limit counter mode, request the time
needed to count 20000 pulses.
OK
^SCCNT: 0000020040
" URC indicates the time taken to count 20000 pulses.
at^sccnt=0,0
Stop and close the pulse counter immediately, without "
" URC
being indicated.
OK
at^sscnt=3
Stop and close the pulse counter immediately, without "
" URC
being indicated.
OK