Mitsubishi Electric 800 Series Instruction Manual page 487

 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
a Communication request is
sent to the inverter in
accordance with the user
program in the computer.
b Inverter data processing time
c Reply data
from the
inverter (Data
(a) is checked
for an error)
d Computer processing delay
time
e Answer from
computer in
response to
reply data c
(Data c is
checked for
error)
*1 In the communication request data from the computer to the inverter, the time of 10 ms or more is also required after an acknowledgment (ACK)
signal showing "No data error detected" is sent. (Refer to
*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
A ENQ Inverter
station
*1
*2
No.
A1 ENQ Inverter
station
*1
*2
No.
A2 ENQ Inverter
station
*1
*2
No.
c. Reply data from the inverter to the computer (No data error detected)
Format
1 2
C ACK Inverter
*1 station
*2
No.
C1 STX Inverter
station
*1
*2
No.
486
5. PARAMETERS
5.12 (N) Operation via communication and its settings
Operation
command
A, A1
With
C
*1
No error
(Request
accepted)
With error D
(Request
rejected)
10 ms or more
*1 Without
No error
(No inverter
processing)
With error Without
(Inverter
outputs c
again.)
3 4 5 6
Instruction code *3
Instruction code
*3
Instruction code
*3
3 4 5 6
*4
Send Receive Error
data data code
type type 1
Operation Multi
frequency command
A A2
With With
C
*3
C1
D D
Without Without (C)
Without F
page 490.)
page
page
Number of characters
7 8 9 10
Data
Data Sum
check
Send Receive Data1
data data
type type
Number of characters
7 8 9 10 11
Error Data1
code
2
Parameter Inverter Monitor
write reset
A A B
With Without With
C E, E1,
*2
C
E2, E3
D D
*2
D
Without Without Without
(C)
Without Without F
495.)
499.) Except for those errors, the error is returned with data
11 12 13 14 15 16
Sum *4
check
*4
Data2
12 13 14 15 16
Data2 ETX
*1
Parameter
read
B
With
E
D
Without (C)
F
17 18 19
Sum
*4
check
17 18 19
Sum check
*4