Inverter Montor Variables - Hitachi NT2021XA Instruction Manual

Chapter 2 Syntax
2.8

Inverter Montor Variables

FM
Output frequency monitoring
- Explanation
This variable can be used to monitor the inverter output frequency. The data monitored with this variable corresponds to the
data monitored by the output frequency monitoring function (d001). This variable is read-only. For details, refer to the Inverter
Instruction Manual.
- Sample program : Program to turn a contact output on when output frequency exceeds 50 Hz and turn the contact output off
(Code area [Code Window])
Label Mnemonic
LOOP if
if
goto
LBL1 UB(02)=
goto
LBL2 UB(02)=
LBL3 Y(02)=
goto
(Data area [Data Window])
U(00) = 1000
U(01) = 5000
Variable name Range of values
when output frequency falls below 10 Hz
parameter1 parameter2
FM <
FM >
LBL3
0
LBL3
1
UB(02)
LOOP
: Set the frequency of 10 Hz in variable "U (00)".
: Set the frequency of 50 Hz in variable "U (01)".
Default
0 to 40000 -
parameter3 parameter4
U(00) then
U(01) then
2-42
Unit Data size
Unsigned
0.01 Hz
1-word data
parameter5
LBL1 : When the output frequency is less than 10 Hz
LBL2 : When the output frequency is more than 50 Hz
: Turn UB (02) off.
: Turn UB (02) on.
: Set the data of UB (02) in Y (02).
Attribute
Readable