Temporarily Adding A Set Value To The Frequency Command - Hitachi WJ Series User Manual

Chapter 9
9.2.12

Temporarily Adding a Set Value to the Frequency Command

 How to increase the motor frequency only upon I/O signal input?
Q
 How to increase the operation speed of devices such as a conveyor by sending an I/O signal?
 How to temporarily raise the frequency to allow actions such as unblocking a clogged pump?
 When the "Trigger for frequency addition [ADD] (50)" input terminal is turned on, the frequency
A
set in the "Add frequency [A145]" is added or subtracted to the output frequency command.
 Either addition or subtraction is selected according to the sign setting of the "Add frequency
direction selection [A146]".
Code
[A145] Add frequency
Add frequency
[A146]
direction selection
[C001]
Input terminal
to
function selection
[C007]
 Using "Trigger for frequency addition [ADD]" to increase the frequency can only be performed
!
within a limited frequency range. Therefore, if the added value exceeds upper and lower limits
or the maximum frequency setting, the frequency command will be limited.
 Using "Trigger for frequency addition [ADD]" to increase the frequency is disabled for the jogging
function.
 When the "FUP/FDN data save enable [C101]" is set to "Save (01)", the frequency command
value stored in the inverter memory don't include the frequency addition value set by "Trigger
for frequency addition [ADD]".
 If the sign of the frequency command changes ("-" to "+" or "+" to "-") due to the calculation
result, the direction of rotation is reversed.
 This function is also enabled for the PID target value. However, when the PID function is used,
[A145] is displayed in increments of 0.01%, with the maximum frequency setting as 100%.
*1. For details, refer to "9.2.13 Increasing/Decreasing Frequency Command by Remote Control".
Item
Sets the frequency to be added.
Frequency command + [A145]
Frequency command - [A145]
Trigger for frequency addition [ADD]:
When this terminal is turned on, [A145] is added
to or subtracted from the frequency command.
*1
9-2-17
Inverter Functions
Description Data
0.00 to
590.00 (Hz)
00
01
50