YASKAWA CIMR-ACA4011 Instruction Manual page 232

Application Precautions
Frequency outputs using UP/DOWN Commands are limited by the frequency reference upper and lower
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limits set in parameters d2-01 to d2-03. Here, frequency references from analog frequency reference termi-
nal A1 becomes the frequency reference lower limit. If using a combination of the frequency reference
from terminal A1 and the frequency reference lower limit set in either parameter d2-02 or d2-03, the larger
lower limit will become the frequency reference lower limit.
If inputting the Run Command when using Up/Down Commands, the output frequency accelerates to the
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frequency reference lower limit.
When using Up/Down Commands, multi-step operations are disabled.
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When d4-01 (Frequency Reference Hold Function Selection) is set to 1, the frequency reference held using
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the UP/DOWN functions is stored even after the power supply is turned off. When the power supply is
turned on and the Run Command is input, the motor accelerates to the frequency reference that has been
stored. To reset (i.e., to 0 Hz) the stored frequency reference, turn on the UP or DOWN Command while
the Run Command is on.
Connection Example and Time Chart
The time chart and settings example when the UP Command is allocated to the multi-function digital input ter-
minal S3, and the DOWN Command is allocated to terminal S4, are shown below.
Parameter
H1-01
H1-02
Fig 6.51 Connection Example when UP/DOWN Commands Are Allocated
Name
Multi-function input (terminal S3)
Multi-function input (terminal S4)
Forward
S1
operation/Stop
S2 Reverse
operation/Stop
S3 Up command
S4
Down command
SC
0 to 10 V analog
signal
Frequency
A1
reference lower
limit
AC
Set Value
10
11
MxC
Sequence
common
Input Terminal Functions
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6-