User Manual of EM730/EM730E Series Inverter
269
DO “set count reached” output
14# function
Pulse count n
CntIn
DI “counter reset” input
36# function
Pulse
information
Count clear
signal
Clear to 0
Set count value
n2
1~65535
≥
Reset
DI “count input” 34# function
HDI “high-speed count input”
35# function
“Set count
reached”
signal
Comparator 2
F18.33
≥
Specified count
value n1
1~65535
Comparator 1
DO “specified count reached”
output 15# function
≤
≤
0
“Specified
count
reached”
signal
Fig. 7-42 Block Diagram of Counting Function
Counting principle: Specific information is entered in the pulse form. The number
n
of
pulses is collected by the DI terminal and then is compared with the “specified count”
1
n
. If
1
n n
, it means that the value does not reach the “specified count”. Otherwise, it means that
the value reaches the “specified count”, the result is outputted by the DO terminal, counting is
continued, and the value is compared with the “set count”
2
n
. If
2
n n
, it means that the
value does not reach the “set count”. Otherwise, it means that the value reaches the “set count”,
the result will be outputted by the DO terminal and counting will be stopped. The “36: clear
counter” input can be used to clear the count and reset the output signal.
When the pulse frequency exceeds 250Hz (=1/(2 (default filtering times)*2*1ms
-1
)), make
sure of the input through the high-speed pulse input terminal (X5), and set F02.06 to “35:
high-speed count input”. 250Hz is only a theoretical value. The actual effect will prevail. In
order to avoid errors, use the high-speed pulse input terminal wherever possible.
2
1
3
4
5
6
7
8
9
10
11
Specified
output
Set output
Pulse input
Clear input
Count value
2
1
3
4
5
6
7
8
8
8
0
Invalid
Valid
Invalid
Valid
Valid
Invalid
Invalid
Fig. 7-16 Counting ExampleFig. 7-16 shows an example, where F16.03=8 and F16.04=5.
When the count reaches the specified value 5, the output of “15: reach the specified value” will
