Mitsubishi Electric FR-F820-00046 Instruction Manual page 487

• Communication operation presence/absence and data format types are as follows.
Symbol
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, 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
Inverter
ENQ
station
A
*1
number
Inverter
ENQ
station
A1
*1
number
Inverter
ENQ
station
A2
*1
number
c. Reply data from the inverter to the computer (No data error detected)
Format
1 2
Inverter
ACK
station
C
*1
number
Inverter
STX
station
C1
*1
number
c. Reply data from the inverter to the computer (Data error detected)
Format
D
NAK
*1 A control code.
*2 The inverter station number is specified in hexadecimal in the range of H00 to H1F (stations No. 0 to 31).
*3 Set the delay time. When Pr.123 PU communication waiting time setting or Pr.337 RS-485 communication waiting time setting is set to
other than "9999", create the communication request data without "delay time" in the data format. (The number of characters decreases by 1.)
*4 CR+LF code: When a computer transmits data to the inverter, some computers automatically provide either one or both of the codes CR (carriage
return) and LF (line feed) at the end of a data group. In this case, the same setting is required for data sent from the inverter to the computer. Use
Pr.124 or Pr.341 for the CR+LF code setting.
486
5. PARAMETERS
5.12 (N) Communication operation parameters
Operation
Operation
command
A, A1
With
*1
No error
C
(Request
accepted)
With error
(Request D
rejected)
10 ms or more
*1
No error
Without
(No inverter
processing)
With error
(Inverter
Without
outputs c
again.)
3 4 5 6 7
Instruction
*3
Data
code
*2
Instruction
*3
Data
code
*2
Send
Instruction
*3
data
code
*2
type
3 4 5 6
*4
*2
Send Receive
Error
data data
code 1
*2
type type
Number of characters
1 2 3
*1
Inverter station number
Operation Multi
frequency command
A A2
With With
*3
C
C1
D D
Without
Without
(C)
Without F
page 489.)
page 493.)
page 497.) Except for those errors, the error is returned with data
Number of characters
8 9 10 11
Sum check
*4
Sum check
Receive
data Data 1
type
Number of characters
7 8 9 10 11
Error
Data 1
code 2
4 5
*2 *4
Error code
Parameter Inverter
Monitor
write reset
A A B
With Without With
E, E1,
*2
C
C
E2, E3
*2
D D
D
Without
Without Without
(C)
Without Without F
12 13 14 15 16
*4
Data 2
12 13 14 15 16
*
ETX
Data 2
1
Parameter
read
B
With
E
D
Without (C)
F
17 18 19
*4
Sum check
17 18 19
Sum
*4
check