5-23
5-6-5 Setting Frequency References by Pulse Train Input
By setting n004 for frequency reference selection to 5 for enabling the pulse train refer-
ence control terminal, frequency references can be executed by pulse train input
through the PR terminal.
The following description provides information on the n149 parameter (pulse train input
scale), which is used to execute frequency references by pulse train input.
H Setting the Pulse Train Input Scale (n149)
• Set this parameter to the pulse train input scale so that frequency references can be executed by pulse
train input.
• Set the maximum pulse train frequency in 10-Hz increments based on 10 Hz as 1. A proportional rela-
tionship is applied to frequencies less than the maximum frequency.
n149
Pulse Train Input Scale Register 0195 Hex Changes during
operation
No
Setting
range
100 to 3,300 Unit of
setting
1 (10 Hz) Default setting 2,500
Note 1. For example, to set the maximum frequency reference with pulse train frequency input at 10
kHz, set the parameter to 1,000 from the following formula.
10,000 (Hz)/10 (Hz) = 1,000
Note 2. Input the pulse train into the frequency reference common (FC) and pulse train input (RP)
terminals under the following conditions.
High level: 3.5 to 13.2 V
Low level: 0.8 V max.
The response frequency is within a range from 0 to 33 kHz (30% to 70% ED).
H Setting the Pulse Train Frequency Reference Gain/Bias (n074/n075)
• Set the input characteristics of pulse train input.
• Gain: Set the gain in percentage based on the maximum frequency of the pulse train input scale in
n149 as 100%.
• Bias: Set the bias in percentage for frequency reference input at 0-Hz pulse train input based oh the
maximum frequency as 100%.
n074
Pulse Train Frequency Reference
Gain
Register 014A Hex Changes during
operation
Yes
Setting
range
0 to 255 Unit of
setting
1% Default setting 100
Basic Operation
Chapter 5
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