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Appendix 3 Control and Monitoring Specific Inverter Data
Appendix 3-2
3.2 Control (PLC Option
Î
Inverter)
(1) iS7 Inverter Frequency Reference
Special D register of PLC
▶
option card for inverter frequency reference
Special D
Register
Use of parameter
Detailed Description
D4451
Inverter Frequency
Command
Inverter Frequency Command x
100
(For example,
To command inverter frequency
30 Hz command, write 3000 in
D4451. )
Exemplary program
▶
1) Set up inverter parameters as follows.
Code
Function Name
Set Value
Remark
DRV07 Freq
Ref
Src
PLC
-
2) Make out a ladder program as shown below. When the M0000 contact point is ON, the
special D register is written with 4000, and thus, the inverter is set up with the reference
frequency 40.00Hz.
Caution
If any one of APO60~64(PLC Wr Data1~5) is set up with the “0380Hex” which is the address of the
common area of the iS7 inverter frequency reference, it is not possible to provide the inverter with
frequency reference via the D4451 special register.
To provide the inverter with frequency reference via the D4451 special register, find out the
parameter which is set up with the “0380Hex” which is the address of the common area of the
frequency reference of the iS7 inverter and replace the setting with “0000Hex.”