YOKOGAWA WT3002E User Manual page 23

Explanation
IM WT3001E-51EN
1.6 Setting the Pulse Range, Pulse Count, and Pulse Rating
• Pulse Input Range
Set an appropriate range that includes the maximum and minimum values of the input
signal. For example, if you are measuring a signal whose rotating speed is between
120 rpms and 180 rpms and the torque is between –18 N·m to +18 N·m, set the pulse
input range of the rotating speed to 100 rpms to 200 rpms and that of the torque to
–20 N·m to +20 N·m.
The selectable range of pulse range of input signals is as follows:
• Revolution signal: 0.0001 to 99999.9999 [rpm]
• Torque signal: –10000.0000 to 10000.0000 [N·m]
If the input signal type is Pulse, the upper and lower limits of the waveform display are
set to the values specified here.
• On models with the D/A output (option), the rated value of the D/A output is as
follows.
Input Signal of Rotating Speed or Torque
Pulse Range Upper setting
Pulse Range Upper setting × (–1)
• Setting the Rotation Pulse Count
Set the pulse count per rotation. Set the value in the range of 1 to 9999.
Input pulse count from the revolution sensor per minute
Rotating Speed =
Pulse count (pulse count per revolution)
* If the scaling factor is 1, the rotating speed is the number of rotations per minute (min
or rpm). In addition, if the revolution signal is a changed signal, you can set the scaling
factor (see section 1.7) to determine the rotating speed before the change.
• Pulse Rating of the Torque Signal
If the torque signal type is Pulse, set the positive and negative ratings of the torque
sensor. Refer to the torque sensor specifications to set the values.
The selectable range of the values is as follows:
• Torque: –10000.0000 to 10000.0000 [N·m]
• Pulse count: 1 to 100000000 [Hz]
Torque = (torque pulse coefficient
*1 The torque pulse count and torque pulse offset are set as shown in the figure on the next
page depending on the pulse rating of the torque signal.
*2 If the torque signal is a changed signal, you can set the scaling factor (see section 1.7) to
determine the torque before the change.
D/A Output
+5 V
–5 V
*1
× pulse frequency + torque pulse offset
1
2
3
4
5
6
*
× scaling factor
7
–1
8
9
10
*1 *2
× scaling factor
11
12
13
Index
1-15