Input Terminal Functions
6-
83
Hold Analog Frequency Using User-set Timing
When one of H1-01 to H1-10 (multi-function contact input terminal S3 to S12 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 thereafter at that frequency.
Fig 6.54 Sample/Hold Analog Frequency
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. If these commands are used at the same time, operation error OPE03 (invalid multi-function input selec-
tion) will occur.
•
Acceleration/Deceleration Ramp Hold command
•
UP/DOWN command
•
Trim Control Increase/Decrease command
Application Precautions
•
When performing sample/hold of analog frequency references, be sure to store references of 100 ms mini-
mum. If the reference time is less than 100 ms, the frequency reference will not be held.
•
The analog frequency reference that is held will be deleted when the power supply is turned OFF.
Switching Operations between a Communications Option Board and
Control Circuit Terminals
You can switch reference input between the Communications Option Board and the control circuit terminals.
Set one of the constants H1-01 to H1-10 (multi-function contact input terminal S3 to S12 function selection)
to 2 (Option/Inverter selection) to enable switching reference input using the terminal ON/OFF status when
the Inverter is stopped.
Sample/hold
command
Analog input
Frequency reference
The analog value 100 ms after the command is turned ON is used as the frequency reference.
