6-84
îš‹ Accelerating and Decelerating Constant Frequencies in the Analog Refer-
ences (+/- Speed)
The +/- speed function increments or decrements the frequency set in analog frequency reference d4-02 (+/-
Speed Limit) using two contact signal inputs.
To use this function, set One of the constants H1-01 to H1-06 (multi-function contact terminal inputs S3 to S8
function selection) to 1C (Trim Control Increase command) and 1D (Trim Control Decrease command). Be
sure to allocate two terminals so that the Trim Control Increase command and Trim Control Decrease com-
mand can be used as a pair.
îš„Related Constants
îš„Trim Control Increase/Decrease Command and Frequency Reference
The frequency references using Trim Control Increase/Decrease command ON/OFF operations are shown
below.
îš„Application Precautions
• Trim Control Increase/Decrease command is enabled when speed reference > 0 and the speed reference is
from an analog input.
• When the analog frequency reference value - d4-02 < 0, the frequency reference is set to 0.
• If only the Trim Control Increase command or Trim Control Decrease command has been set for a multi-
function contact input terminal S3 to S8, operation error OPE03 (invalid multi-function input selected)
will occur.
Con-
stant
Number
Name Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO
BUS
Regis-
ter
V/f
V/f
with
PG
Open
Loop
Vec-
tor
Flux
Vec-
tor
d4-02
+ - Speed
limits
Set the frequency to be add to or
subtracted from the analog fre-
quency reference as a percent,
taking the maximum output fre-
quency to be 100%.
Enabled when the increase (+)
speed command or decrease (-)
speed command is set for a
multi-function input.
0 to 100 10% No A A A A 299H
Frequency Reference
Set Frequency
Reference
+ d4-02
Set Frequency
Reference
- d4-02
Set Frequency Command
Trim Control Increase
Command Terminal
ON OFF ON OFF
Trim Control Decrease
Command Terminal
OFF ON ON OFF
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