5-11
IM WT5000-01EN
Upper and Lower Limits of Pulse Input Range (Pulse Range
Upper, Pulse Range Lower)
Set an appropriate range for the maximum and minimum input signal values. For example, when you are
measuring signals for rotating speeds of 120 rpm to 180 rpm and torques of –18 N•m to +18 N•m, set the
rotating speed pulse input range to 100 rpm to 200 rpm, and set the torque pulse input range to –20 N•m to +20
N•m.
You can set the pulse range for each input signal within the following limits.
• Torque signal: 10000.0000 to 10000.0000 [N•m]
• Revolution signal: −99999.9999 to 99999.9999 [rpm]
• Aux signal: −10.00 M to 10.00 M
When the input signal type is pulse, the waveform display lower and upper limits are the values that you set
here.
On models with the D/A output option, the rated D/A output values are as follows.
Input Signal D/A Output
Setting for Pulse Range Upper +5 V
Setting for Pulse Range Upper × (–1) −5 V
Torque Signal Pulse Rating
When the torque signal type is pulse, refer to the torque meter’s specifications to set its rated positive and
negative values.
Positive and Negative Rated Torque Signal Values (Rated Upper, Rated Lower)
Range: –10000.0000 to 10000.0000 (N•m)
Positive and Negative Rated Torque Signal Pulse Frequencies (Rated Freq (Upper),
Rated Freq (Lower))
Range: 1 to 100000000 (Hz)
The following equation is used to compute the torque.
Torque = S(AX + B) – NULL
S: The scaling factor
1
A: The torque pulse coefficient
2
X: The pulse frequency
B: The torque pulse offset
2
NULL: The null value
1 If the torque signal is a changed signal, you can set the scaling factor to determine the torque before the
change.
2 The torque pulse coefficient and torque pulse offset are determined from the torque signal pulse rating as
shown in the next figure.
5 Motor Evaluation and Auxiliary Input (Option)
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