Chapter 8 Built-in High-speed Counter Function
8-18
(b) Count function of Revolution/Unit time is used to count the number of pulses for a specified time
while auxiliary mode enable signal is On.
(c) With the displayed number of pulses updated for a specified time and the number of pulses per
revolution input, Revolution/Unit time can be counted.
(d) Number of Revolution per 1 second is indicated after number of pulse per 1 revolution is set and
time is set to 1 second (1000ms). In order to indicate by Revolutions per minute (RPM), the
operation is executed in program.
(e) The example that number of pulse per 1 revolution set to ‘1’ and time is set to 1000 ms is as
shown below. (Ch0)
(f) In order to indicate revolution per minute (RPM), the following program is necessary as shown
below. Use MUL function block and save RPM value at revolution per minute (LINT type) as 64 bit.
At this time, first, change revolution per second (DINT type) to LINT type.
Command
1000
500
0
300
400
700
500
350
1000㎳ 1000㎳ 1000㎳ 1000㎳
100 300 200 150
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