PARAMETERS
124
(2) Communication operation presence/absence and data format types
Communication operation presence/absence and data format types are as follows:
No.
Operation
Run
Command
Running
Frequency
Parameter
Write
Inverter
Reset
Monitor-
ing
Parame-
ter Read
1)
Communication request is sent
to the inverter in accordance
with the user program in the
computer.
A'
A
(A")
Note1
A
(A")
Note2
A
B
B
2) Inverter data processing time
Present
Present
Present
Absent Present Present
No error*
(Request
accepted)
C
C
C
Absent
E,E'
(E")
Note1
E
(E")
Note2
3)
Reply data
from the
inverter
(Data 1) is
checked for
error.
With error
(request rejected)
D
D
D
Absent
F
F
4)
Computer processing delay
time
Absent
Absent
Absent
Absent
Absent Absent
No error*
(No inverter
processing)
Absent
Absent
Absent
Absent
G
G
5)
Answer from
computer in
response to
reply data 3).
(Data 3) is
checked for
error)
With error
(Inverter outputs
3) again)
Absent
Absent
Absent
Absent
H
H
* In the communication request data from the computer to the inverter, 10ms or more is also required after
"no data error (ACK)". (Refer to page 126.)
Note: 1. Setting any of "0.01 to 9998" in Pr. 37 "speed display" and "1" in data code
"HFF" changes the data format to A" or E", the output frequency to the speed
indication, and the unit to 0.001r/min. If the data code FF is not 1, the unit is
1r/min and the 4-digit data format can be used.
2. The read/write data format of Pr. 37 "speed display" is always E"/A".
"
(3) Data format
Data used is hexadecimal.
Data is automatically transferred in ASCII between the computer and inverter.
1) Data format types
(1) Communication request data from computer to inverter
Format A
*
3
ENQ
Data
*
4
1
2
3
4
5
6
7
8
9
10 11 12 13
Format A'
Data
1
2
3
4
5
6
7
8
9
10 11
Format A"
1
2
3
4
5
6
7
8
9
[Data write]
[Data read]
Format B
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15
Data
Inverter
station
number
Instruction
code
Inverter
station
number
Instruction
code
Inverter
station
number
Instruction
code
Inverter
station
number
Instruction
code
Sum
check
Sum
check
Sum
check
Sum
check
W
a
it
in
g
ti
me
W
a
it
in
g
ti
me
*
5
W
a
it
in
g
ti
me
W
a
it
in
g
ti
me
*
5
←
Number of characters
←
Number of characters
←
Number of characters
←
Number of characters
*
3
ENQ
*
3
ENQ
*
3
ENQ
*
4
*
4
*
4