Mitsubishi Electric 800 Series Instruction Manual page 557

(N) Operation via communication and its settings
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.
Symbol Operation
Communication request is
sent to the inverter in
a
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)
Computer processing delay
d
time
Answer from
computer in
response to
e reply data c
(Data c is
checked for
error)

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
559.)

Reply from the inverter to the inverter reset request can be selected. (Refer to

At mode error, and data range error, C1 data contains an error code. (Refer to
data format D.
• Data writing format
a. Communication request data from the computer to the inverter
Format
1 2
ENQ Inverter station
A
No.
 
ENQ Inverter station
A1
No.
 
ENQ Inverter station
A2
No.
 
c. Reply data from the inverter to the computer (No data error detected)
Format
1 2
ACK Inverter station
C
No.
 
STX Inverter station
C1
No.
 
c. Reply data from the inverter to the computer(Data error detected)
Number of characters
Format
1 2
Inverter station
D NAK

No.


Indicates a control code.

Specifies the inverter station numbers in the range of H00 to H1F (stations 0 to 31) in hexadecimal.

Set the delay 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.)

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).
556
PARAMETERS
Operation Operation
command frequency
A, A1 A
With With
No error

(Request C C
accepted)
With error
(Request D D
rejected)
10 ms or more
No error

(No inverter Without Without
processing)
With error
(Inverter
Without Without
outputs c
again.)
3 4 5 6 7
Instruction
Data

code
Instruction
Data

code
Send
Instruction
data

code
type
3 4 5 6 7

Send Error Error
Receive
data code code
data
type
type 1 2
3 4 5
Error

code
Multi Parameter
command write
A2 A
With With
C1 C

D D
Without (C) Without
F Without
page 564.)
page 568) Except for those errors, the error is returned with
Number of characters
8 9 10 11 12
Sum check
Sum check

Receive
Data1
data
type
Number of characters
8 9 10 11 12
Data1 Data2
Inverter
Monitor
reset
A B
Without With
E, E1,
C

E2, E3
D D

Without
Without
(C)
Without F
13 14 15 16 17

Data2 Sum check
13 14 15 16 17
ETX
Sum check

Parameter
read
B
With
E
D
Without (C)
F
page
18 19

18 19
