Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 640

• Communication operation presence/absence and data format types are as follows.
Symbol Operation
Communication request is sent to the
a inverter in accordance with the user
program in the computer.
b Inverter data processing time
Reply data from the
c inverter (Data (a) is
checked for an error.)
d Computer processing delay time
Reply from computer in
response to reply data c
e
(Data c is checked for
error.)
*1 In the communication request data from the computer to the inverter, 10 ms or more is also required after "no data error (ACK)". (Refer to
642.)
*2 Reply from the inverter to the inverter reset request can be selected. (Refer to
*3 At mode error, and data range error, C1 data contains an error code. (Refer to
format D.
• Data writing format
a. Communication request data from the computer to the inverter
Format
1 2 3
Inverter
ENQ
Instruction
station
A
*1
code
*2
number
Inverter
ENQ
Instruction
station
A1
*1
code
*2
number
Inverter
ENQ
Instruction
station
A2
*1
code
*2
number
c. Reply data from the inverter to the computer (No data error detected)
Format
1 2 3
Inverter
ACK
station *4
C
*1
*2
number
Inverter
Send
STX
station
C1 data
*1
*2
type
number
c. Reply data from the inverter to the computer (Data error detected)
Format
1
*1
D
NAK
*1 Indicates a control code.
*2 Specifies the inverter station numbers in the range of H00 to H1F (stations 0 to 31) in hexadecimal.
*3 Set the waiting time. When Pr.123 or Pr.337 (waiting time setting) ≠ "9999", create a 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 be also 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 or Pr.341 (CR/LF selection).
• Data reading format
Operation
command
A, A1 A
With With
*1
No error
C C
(Request
accepted)
With error
(Request D D
rejected)
10 ms or more
*1
No error
Without Without
(No inverter
processing)
With error
(Inverter
Without Without
outputs c
again.)
Number of characters
4 5 6 7 8
*3
Data
*3
Data
Send Receive
*3
data data
type type
Number of characters
4 5 6 7
Receive
Error Error
data
code 1 code 2
type
Number of characters
2 3
Error
*2
Inverter station number
code
Operation Multi Parameter
frequency command write
A2 A
With With
*3
C
C1
D D
Without
Without
(C)
F Without
page 646.)
page 651.) Except for those errors, the error is returned with data
9 10 11 12 13
Sum
*4
check
Sum
*4
check
Data 1 Data 2
8 9 10 11 12
Data 1 Data 2
4 5
*4
5.15 (N) Communication operation parameters
Inverter Parameter
Monitor
reset
A B B
Without With With
E, E1,
*2
E
C
E2, E3
*2
D D
D
Without
Without Without (C)
(C)
Without F F
14 15 16 17 18
Sum
check
13 14 15 16 17 18
*
ETX Sum
1 check
5. PARAMETERS
1
read
2
3
4
5
6
page
7
8
19
9
10
*4
19
*4
639