Mitsubishi Electric 800 Series Instruction Manual page 133

• 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 Indicates 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 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 PU communication CR/LF selection for the CR+LF code setting.
• Data reading format
a. Communication request data from the computer to the inverter
Format
1
B
ENQ
c. Reply data from the inverter to the computer (No data error detected)
Format
1
E
STX
E1
STX
E2
STX
Format
1
E3
STX
132
3. RS-485 Communication
3.4 Mitsubishi inverter protocol (computer link communication)
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
*1
Inverter station number
Number of characters
2 3 4
Inverter station
*1
Instruction code
*2
number
2 3 4
Inverter station
*1
Read data
*2
number
Inverter station
*1
Read data
*2
number
Inverter station
*1
Read data
*2
number
2 3
Inverter station
*1
Read data (Inverter model information)
*2
number
Number of characters
8 9 10 11
Sum check
*4
Sum check
Receive
data Data 1
type
Number of characters
7 8 9 10
Error
Data 1
code 2
3 4 5
*2 *4
Error code
5 6 7
*3
Sum check
Number of characters
5 6 7
ETX
*1
Sum check
ETX
Number of characters
4 to 23
12 13 14 15 16
*4
Data 2
11 12 13 14 15 16
ETX
Data 2
*1
8 9
*4
8 9 10 11
*1 *4
Sum check
*4
*1
Sum check
ETX
24 25 26
*1
Sum check
ETX
17 18 19
*4
Sum check
17 18 19
Sum
*4
check
12 13
*4
27
*4