YASKAWA Varispeed E7 Instruction Manual And Parameter Description page 193

Application Precautions
Frequency outputs using UP/DOWN commands are limited by the frequency reference upper and lower
•
limits set in constants d2-01 to d2-03. Here, the frequency value from analog frequency reference input A1
becomes the frequency reference lower limit. If using a combination of the frequency reference from ter-
minal A1 and the frequency reference lower limit set in either constant d2-02 or d2-03, the larger limit
value will become the frequency reference lower limit.
If inputting the run command when using UP/DOWN commands, the output frequency accelerates to the
•
frequency reference lower limits set in d2-02.
When using UP/DOWN commands, multi-step operations are disabled.
•
When d4-01 (Frequency Reference Hold Function Selection) is set to 1, the frequency reference value
•
using the UP/DOWN functions is stored even after the power supply is turned OFF. When the power sup-
ply 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 contact input
terminal S3, and the DOWN command is allocated to terminal S4, are shown below.
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Constant
H1-01 Multi-function input (terminal S3)
H1-02 Multi-function input (terminal S4)
0 to 10 V analog
signal
Fig 6.37 Connection Example when UP/DOWN Commands Are Allocated
Name
Inverter
Forward
S1
operation/Stop
Reverse
S2
operation/Stop
Up command
S3
Down command
S4
Digital input
SN
neutral
Frequency
A1
reference lower limit
AC
Set Value
10
11