Mitsubishi Electric FR-A700 Instruction Manual page 631

Parameter
Data definitions
● Control codes
Signal Name
Tab. 6-135: Control codes
● Inverter station number
Specify the station number of the inverter which communicates with the computer.
The inverter station numbers are specified between H00 and H1F (stations 0 to 31) in
hexadecimal.
● Instruction code
Specify the processing request, e.g. 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 as appropriate. (Refer to the appendix.)
● 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 the appendix.)
● 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 between 0 and 150ms in 10ms increments (e.g. 1 = 10ms, 2 = 20ms).
Fig. 6-222: Specifying the waiting time
When Pr. 123, Pr. 337 "Waiting time setting" ≠ 9999, create the communication request data
NOTES
without "waiting time" in the data format. (The number of characters decreases by 1.)
The data check time changes depending on the instruction code. (Refer to page 6-454.)
FR-A700 EC
ASCII Code
STX H02
ETX H03
ENQ H05
ACK H06
LF H0A
CR H0D
NAK H15
Computer
⇓ Data flow
Inverter
Inverter
⇓ Data flow
Computer
Communication operation and setting
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)
Inverter data processing time
= Waiting time+Data check time
(setting × 10ms)(About 10 to 30ms which depends
on the instruction codes)
I000038C
6 - 451