Mitsubishi Electric FR-E720-008 Instruction Manual page 219

(3) Communication operation presence/absence and data format types
Data communication between the computer and inverter is made in ASCII code (hexadecimal code).
Communication operation presence/absence and data format types are as follows:
No. Operation
Communication request is sent to the
1)
inverter in accordance with the user
program in the computer.
2)
Inverter data processing time
Reply data from the
3)
inverter (Data 1) is
checked for error)
4) Computer processing delay time
Answer from
computer in response
5)
to reply data 3).
(Data 3) is checked
for error)
∗1
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 221)
∗2
Reply from the inverter to the inverter reset request can be selected. (Refer to page 225)
∗3
When any of "0.01 to 9998" is set in Pr. 37 and "01" in instruction code HFF sets data format to A2 or E2. In addition, data format is always A2 and E2
for read or write of Pr. 37.
∗4
At mode error, and data range error, C1 data contains an error code. (Refer to page 230) Except for those errors, the error is returned with data format D.
Data writing format
Communication request data from the computer to the inverter 1)
Format
1 2 3
Inverter
ENQ
A
station
∗1
∗2
number
Inverter
ENQ
A1
station
∗1
∗2
number
Inverter
ENQ
A2
station
∗1
∗2
number
Inverter
ENQ
A3
station
∗1
∗2
number
Reply data from the inverter to the computer 3) (No data error detected)
Format
1 2 3
Inverter
ACK
C
station
∗1
∗2
number
Inverter
STX
C1
station
∗1
∗2
number
Reply data from the inverter to the computer 3) (With data error)
Number of Characters
Format
1 2 3
Inverter
NAK
D
station
∗1
∗2
number
∗1
Indicate a control code
∗2
Specify the inverter station numbers between H00 and H1F (stations 0 to 31) in hexadecimal.
∗3
When the Pr. 123 PU communication waiting time setting is other than 9999, create the communication request data without "waiting time" in the data
format. (The number of characters decreases by 1.)
∗4
CR, LF code
When data is transmitted from the computer to the inverter, codes CR (carriage return) and LF (line feed) are automatically set at the end of a data group
on some computers. In this case, setting must also be made on the inverter according to the computer. Whether the CR and LF codes will be present or
absent can be selected using Pr. 124 PU communication CR/LF selection.
Run Operation
Command Frequency
A1
Present
No error ∗1
(Request C
accepted)
With error.
(Request D
rejected)
No error ∗1
(No inverter Absent
processing)
With error.
(Inverter outputs Absent
3) again.)
Number of Characters
4 5 6 7 8
Instruction
∗3
Data
code
Instruction
∗3
Data
code
Instruction
∗3
code
Send Receive
Instruction
∗3
data data
code
type type
Number of Characters
4 5 6 7 8
∗4
Send Receive
Error Error
data data
code 1 code 2
type type
4 5
Error
∗4
code
Communication operation and setting
Multi Parameter
command Write
A, A2 ∗3 A, A2 ∗3
A3
Present Present Present
C C1∗4 C
D D D
10ms or more
Absent
Absent Absent
(C)
Absent F Absent
9 10 11 12 13
Sum
∗4
check
Sum
∗4
check
Data
Data1
9 10 11 12 13
Data1
Inverter Parameter
Monitor
Reset
A B
Present Present
E, E1, E2
C ∗2
∗3
D ∗2
D
Absent Absent (C) Absent (C)
Absent F
14 15 16 17
Sum
∗4
check
Sum
Data2
check
14 15 16 17
ETX
Sum
Data2
∗1
check
Read
B
Present
E, E2 ∗3
D
F
18 19
∗4
4
18 19
∗4
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