Data Definitions - Mitsubishi Electric 800 Series Instruction Manual

4.4.4

Data definitions

• Control code
Signal name ASCII Code
STX H02
ETX H03
ENQ H05
ACK H06
LF H0A
CR H0D
NAK H15
• Inverter station number
Specify the station number of the inverter which communicates with the computer.
• Instruction code
Specify the processing request, for example, operation or monitoring, given by the computer to the inverter. Hence, the
inverter can be run and monitored in various ways by specifying the instruction code appropriately. (Refer to
• Data
Indicates the data such as frequency and parameters transferred to and from the inverter. The definitions and ranges of set
data are determined in accordance with the instruction codes. (Refer to
• Waiting time
Specify the waiting time between the receipt of data at the inverter from the computer and the transmission of reply data. Set
the waiting time in accordance with the response time of the computer in the range of 0 to 150 ms in 10 ms increments. (For
example; 1=10 ms, 2= 20 ms)
Computer
↓
Inverter
Inverter
↓
Computer
40
PARAMETER
Description
Start Of Text (Start of data)
End Of Text (End of data)
Enquiry (Communication request)
Acknowledge (No data error detected)
Line Feed
Carriage Return
Negative Acknowledge (Data error detected)
page 47.)
Inverter data processing time
= Waiting time + data check time
(setting × 10ms)
(About 10 to 30 ms,
which depends on the
instruction code)
page 47.)