Mitsubishi Electric FR-E720-0.1 K Instruction Manual page 214

Communication operation and setting
(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.
Communication request is sent to the inverter in
1)
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 to reply data 3).
5)
(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 214)
∗2
Reply from the inverter to the inverter reset request can be selected. (Refer to page 218)
∗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.
Data writing format
1) Communication request data from the computer to the inverter
Format
1
ENQ
A station number
∗1
ENQ
A1 station number
∗1
ENQ
A2 station number
∗1
3) Reply data from the inverter to the computer (Without data error)
Number of Characters
Format
1
ACK
C station number
∗1
3) Reply data from the inverter to the computer (With data error)
Number of Characters
Format
1
NAK
D station number
∗1
∗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 (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 (CR, LF selection).
212
Operation
No error ∗1
(Request accepted)
With error.
(Request rejected)
No error ∗1
(No inverter
processing)
With error.
(Inverter outputs 3)
again.)
2 3 4 5
Inverter
Instruction
code
∗2
Inverter
Instruction
code
∗2
Inverter
Instruction
code
∗2
2 3 4
Inverter
∗4
∗2
2 3 4 5
Inverter
Error
∗4
code
∗2
Run Operation Parameter
Command Frequency Write
A, A2 ∗3 A, A2 ∗3
A1
Present Present Present
C C
D D
Absent Absent Absent
Absent Absent Absent
Number of Characters
6 7 8 9
∗3
Data
Sum
∗3
Data
check
∗3
Data
Inverter
Monitor
Reset
A B
Present Present
E, E1, E2
C ∗2
C
∗3
D ∗2
D D
10ms or more
Absent Absent (C)
Absent F
10 11 12 13
Sum
∗4
check
∗4
Parameter
Read
B
Present
E, E2 ∗3
D
Absent (C)
F
14 15
Sum
∗4
check