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FX Series PLC User's Manual - Data Communication Edition
Inverter Communication
*1.
Refer to the following table for the number of sent/received characters.
Inverter
communication
instruction
IVRD
IVDR
IVCK
IVWR
*2
IVBWR
IVMC
*2.
Indicates the number of sent/received characters required to write 1 parameter.
The IVBWR instruction executes parameter writing by the number of times of communication
*3.
The inverter gives no response because the inverter is being reset.
The PLC waits for 2.2 s until reset of the inverter is completed, and then completes execution of the
inverter communication instruction.
*4.
Refer to the following table for the data check time in inverters.
Make sure to refer to the manual of the inverter used, and confirm the data check time for the
communication command used.
Various monitors, operation command, set frequency
Parameters read/write, set frequency (EEPROM)
The IVWR, IVRD and IVBWR instructions automatically change expansion parameters and the 2nd
parameter.
The data check time for the last (2nd or 3rd) sending/receiving in the IVWR and IVRD instructions and
the data check time for the last sending/receiving of each parameter writing in the IVBWR instruction
correspond to parameter reading/writing (< 30 ms).
The data check time for sending and receiving (expansion parameter change and 2nd parameter
change) other than the above correspond to various monitors (< 12 ms).
Parameter/
instruction code
Sending Receiving Total Sending Receiving Total Sending Receiving Total
Change of the 2nd
parameter is
11
unnecessary.
Change of the 2nd
parameter is
11
necessary.
HF3, HFA, HFF
11
HFD
13
Other than above
13
H73, H7A, H7F, H6C
9
Other than above
9
Change of the 2nd
parameter is
11
unnecessary.
Change of the 2nd
parameter is
11
necessary.
Change of the 2nd
parameter is
11
unnecessary.
Change of the 2nd
parameter is
11
necessary.
-
19
Item
(RAM)
Parameter all clear/all clear
Reset instruction
2.4 Execution Times in Inverter Communication Instructions
First
Second
4
15
9
11
4
15
11
4
4
15
-
-
*3
13
-
-
0
4
17
-
-
9
18
-
-
11
20
-
-
4
15
13
4
4
15
11
4
4
15
13
4
4
15
11
4
19
38
-
-
Data check time
(The PLC waits for 2.2 s until reset of the inverter is
completed, and then completes execution of the
inverter communication instruction.)
2 Specifications
Third
20
-
-
15
9
11
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
17
-
-
15
13
4
17
-
-
15
13
4
-
-
-
S
2
<12ms
<30ms
<5s
No response
E-13
A
B
-
20
-
C
-
-
-
-
-
D
17
-
E
17
-
F
.
G
H
I
Apx.A
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