Hitachi SJ700-2 Series - Inverter Monitor Variables

Chapter 5 Instruction Words
5 - 37
5.9 Inverter Montor Variables
Variable name Range of values Default Unit Data size Attribute
FM
Output frequency
monitoring
0 to 40000 - 0.01 Hz
Unsigned
1-word data
Readable
- 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 FM < U(00) then LBL1 : When the output frequency is less than 10 Hz
if FM > U(01) then LBL2 : When the output frequency is more than 50 Hz
goto LBL3
LBL1 UB(02)= 0 : Turn UB (02) off.
goto LBL3
LBL2 UB(02)= 1 : Turn UB (02) on.
LBL3 Y(02)= UB(02) : Set the data of UB (02) in Y (02).
goto LOOP
：
(Data area [Data Window])
U(00) = 1000 : Set the frequency of 10 Hz in variable "U (00)".
U(01) = 5000 : Set the frequency of 50 Hz in variable "U (01)".