Omron VARISPEED F7 User Manual page 255

Application Precautions
Frequency references which use the UP/DOWN commands are limited by the frequency reference upper
•
and lower limits set in parameters d2-01 to d2-03. In this case the value from the input A1 becomes the fre-
quency 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 limit value will become
the frequency reference lower limit.
If the UP/DOWN commands are used as frequency reference and the run command is input the inverter
•
accelerates to the frequency reference lower limit which is 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 OFF.
Connection Example and Timing Chart
The time chart and settings example when the UP command is allocated to the digital input terminal S3, and
the DOWN command is allocated to terminal S4, are shown below.
Parameter
6
72
6-
H1-01 Multi-function input (terminal S3)
H1-02 Multi-function input (terminal S4)
0 to 10 V analog sig-
nal
Fig 6.69 Connection Example when UP/DOWN Commands Are Allocated
Name
Inverter
Forward operation/
Stop
S1
Reverse operation/
S2
Stop
Up command
S3
Down command
S4
Digital input neu-
tral
SN
Frequency reference lower
A1
limit
AC
Set Value
10
11