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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
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
digital input terminal, an OPE03 alarm will be displayed.
îš‹ Hold Analog Frequency Using User-set Timing
When one of the parameters H1-01 to H1-05 (digital input terminal S3 to S7 function selection) is set to 1E
(sample/hold analog frequency command), the analog frequency reference will be held from 100 ms after the
terminal is turned ON, and operation will continue at that frequency.
Fig 6.71 Sample/Hold Analog Frequency
îš„Related Parameters
Multi-function Digital Inputs (H1-01 to H1-05)
îš„Precautions
When setting and executing sample and hold for analog frequency references, observe the following precau-
tions.
Frequency Reference
Set Frequency
Reference
+ d4-02
Set Frequency
Reference
- d4-02
HOLD
Trim Control Increase Command
Terminal
ON OFF ON OFF
Trim Control Decrease Com-
mand Terminal
OFF ON ON OFF
Set Value Function
Control Methods
V/f
V/f
with
PG
Open
Loop
Vector
Closed
Loop
Vector
1E Analog frequency reference sample / hold Yes Yes Yes Yes
Sample/hold
command
Analog input
Frequency reference
The analog value 100 ms after the command is turned ON is used as the frequency reference.
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