Accelerating And Decelerating Constant Frequencies In The Analog References (+/- Speed) - YASKAWA G7 Series Technical Manual

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 parameters H1-01 to H1-10 (multi-function contact terminal inputs S3 to
S12 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.
Related Parameters
Name
Parameter
Number
Display
Trim Control Sets the amount of frequency
Level reference to be added or
subtracted as a percentage of
maximum output frequency
d4-02
(E1-04) when multi-function
Trim Control
inputs "trim control increase" and
Lvl
"trim control decrease" are
selected (H1-XX = 1C and 1D).
Trim Control Increase/Decrease Command and Frequency Reference
The frequency references using Trim Control Increase/Decrease command ON/OFF operations are shown
below.
Frequency Reference
Trim Control Increase
Command Terminal
Trim Control Decrease
Command Terminal
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 S12, operation error OPE03 (invalid multi-function input selected)
will occur.
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Setting
Description
Range
0 to 100
Set Frequency Set Frequency
Reference Reference
+ d4-02 - d4-02
ON OFF
OFF ON
Input Terminal Functions
Control Methods
Change
Open
Factory
V/f
during
Loop
Setting
V/f with
Operation
Vector
PG
10% No A A
Set Frequency Command
ON
ON
Open
Flux Loop
Vector Vector
1 2
A A A
OFF
OFF
75
6-