User`s manual

6-71

 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 6.70 Sample/Hold Analog Frequency

Related Parameters

Multi-function Digital Inputs (H1-01 to H1-05)

Precautions

When setting and executing sample and hold for analog frequency references, observe the following precau-

tions.

Setting Precautions

When using sample/hold of analog frequency reference, you cannot use the following commands at the same

time. Otherwise operation error OPE03 (invalid multi-function input selection) will occur.

• Acceleration/Deceleration Ramp Hold command

• UP/DOWN command

• Trim Control Increase/Decrease command

Application Precautions

• When performing sample/hold of analog frequency reference, be sure to close the digital input for 100 ms

or more. If the sample/hold time is less than 100 ms, the frequency reference will not be held.

• The frequency reference value that is held will be deleted when the power supply is turned OFF.

Set Value Function

Control Methods

V/f

with

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.