Trim Control Function (+/- Speed) - YASKAWA Varispeed E7 Instruction Manual And Parameter Description

Trim Control Function (+/– Speed)
The +/– speed function increments or decrements the frequency reference from analog input by the value set
in constant d4-02 (+/– Speed Limit) using two digital inputs.
To use this function, set two of the constants H1-01 to H1-05 (multi-function contact terminal inputs S3 to S7
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 are used as a pair. Otherwise an OPE03 alarm will be displayed.
Related Constants
Con-
stant
Number
d4-02 +/- speed limits
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
•
source is an analog input (A1 or A2).
When the analog frequency reference value - d4-02 < 0, the frequency reference is set to 0.
•
If only one of the Trim Control Increase command or Trim Control Decrease command has been set for a
•
multi-function contact input terminal, operation error OPE03 (invalid multi-function input selected) will
occur.
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Name
Set the frequency to be add to or subtracted from the ana-
log frequency reference as a percent, taking the maximum
output frequency to be 100%.
Enabled when the increase (+) speed command or decrease
(-) speed command is set for a multi-function input.
Set Frequency
Reference
+ d4-02
ON
OFF
Description
Set Frequency
Reference
- d4-02
OFF ON
ON ON
Change
Setting Factory during Access
Range Setting Opera- Level
tion
0 to 100 10% No A
HOLD
OFF
OFF