Rotation Speed Measurement Function - Mitsubishi NZ2GFCF-D62PD2 User Manual

8.14

Rotation Speed Measurement Function

The rotation speed measurement function counts the pulses of the pulse input terminals in phase A and B, and
automatically calculates the rotation speed.
Encoder
(1) Setting method of the rotation speed measurement function
1.
Set "Parameter write" for "Method selection".
"CC IE Field Configuration" window
2.
Set "CH Operation mode setting " to "2: Rotation Speed Measurement Mode".
(2) Calculation of the rotation speed
The rotation speed measurement function calculates the rotation speed from the following formula.
• Rotation speed (r/min) = (60 × Count value per unit of time) ÷ (Unit of time
*2
rotation
*1 Select a unit of time from 0.01s, 0.1s, or 1s.
*2 Set the number of pulses per rotation in the range of 1 to 8000000.
Therefore, when the count value per unit of time is 0, the rotation speed is 0(r/min).
At subtraction count, the value of the rotation speed is negative.
(3) Setting of the unit of time for rotation speed measurement and the number of
pulses per rotation
Set a unit of time to CH Time unit setting (Rotation speed measurement) (RWw18, RWw30).
Set the number of pulses per rotation to CH Number of pulses per rotation (RWw1A to RWw1B, RWw32 to
RWw33).
Setting item
CH Time unit setting (Rotation speed measurement)
(RWw18, RWw30)
CH Number of pulses per rotation
(RWw1A to RWw1B, RWw32 to RWw33)
152
Pulses
[CC IE Field Configuration]
)
High-speed
counter module
Rotation
speed
CH
measurement
(RWr1A to RWr1B, RWr32 to RWr33)
Select a high-speed counter module in "List of stations"
[Parameter Processing of Slave Station]
Setting range
0: 0.01s
1: 0.1s
2: 1s
1 to 8000000
Remote register
Measured rotation speed value
*1
× Number of pulses per
Reference
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