Inverter Monitor Variables - Hitachi SJ700-2 Series Instruction Manual

5.9 Inverter Montor Variables
Variable name
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.
- Sample program: Program to turn a contact output on when output frequency exceeds 50 Hz and turn
the contact output off when output frequency falls below 10 Hz
(Code area [Code Window])
：
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
Range of values
0 to 40000
FM < U(00)
FM > U(01)
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)".
Chapter 5 Instruction Words
Default Unit
- 0.01 Hz
then LBL1 : When the output frequency is less than 10 Hz
then 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).
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Data size Attribute
Unsigned
Readable
1-word data