Mitsubishi Electric FR-A820-00046 Instruction Manual page 843

Parameters
Data definitions
● Control code
Signal name
Tab. 5-277: Control codes
● 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 page 5-648.)
● 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 page 5-648.)
● 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
Fig. 5-318:
NOTES 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.)
The data check time varies depending on the instruction code. (Refer to page 5-643.)
FR-A800
ASCII Code
STX H02
ETX H03
ENQ H05
ACK H06
LF H0A
CR H0D
NAK H15
Specifying the waiting time
(N) Operation via communication and its settings
Description
Start Of Text (Start of data)
End Of Text (End of data)
Inquiry (Communication request)
Acknowledge (No data error detected)
Line Feed
Carriage Return
Negative Acknowledge (Data error detected)
Inverter data processing time Inverter data processing time
Waiting time
=
(setting x 10 ms)
data check time
+
(About 10 to 30ms,
which depends on the
instruction code)
I002736E
5 - 641