Mitsubishi Electric MELSEC iQ-R Series User Manual page 26

Application example
This section describes an application example of the pre-scale function in an example system that uses a flow meter. In the
following example, values stored in 'CH1 Accumulating count value' (Un\G2, Un\G3) are converted as flow rate (unit: cm
Pulse input module
■Conditions
• Each pulse input from the flow meter indicates 3cm
• The number of input pulses per count cycle (1s) is 570 pulses.
■Setting details
From the above conditions, set the pulse input module as follows.
Item
'CH1 Pre-scale setting value' (Un\G135)
'CH1 Pre-scale function selection' (Un\G134)
'CH1 Count cycle change function selection' (Un\G141)
'CH1 Count cycle setting value' (Un\G142)
■Operation result
The sampling pulse number operation result is shown below.
• Sampling pulse number = 570  3  1 = 1710cm
The sampling pulse number for each count cycle (1s) is added to 'CH1 Accumulating count value' (Un\G2, Un\G3), so this can
be used with the unit of cm
1 FUNCTIONS
24
1.4 Pre-scale Function
Flow meter
3
.
3
.
Setting details
3
1 (1)
Count cycle change function valid (1)
1s (0)
3
/s
3
).