Mitsubishi Electric FR-E 500 Instruction Manual page 141

(4) Data definitions
1) Control codes
Signal ASCII Code
STX
ETX
ENQ
ACK
LF
CR
NAK
2) Inverter station number
Specify the station number of the inverter which communicates with the computer.
3) Instruction code
Specify the processing request, e.g. operation, 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 page 192.)
4) 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 192.)
5) 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).
Computer
↓
Inverter
Inverter
↓
Computer
Note: If the Pr. 123 "waiting time setting" value is not 9999, create the communication
request data with no "waiting time" in the data format. (The number of characters
is decremented by 1.)
6) Response time
Computer
Inverter
Inverter
Computer
Data sending time
Computer
Inverter
Inverter
Computer
Description
H02 Start of Text (Start of data)
H03 End of Text (End of data)
H05 Enquiry (Communication request)
H06 Acknowledge (No data error detected)
H0A Line Feed
H0D Carriage Return
H15 Negative Acknowledge (Data error detected)
Data sending time (refer to the following calculation expression)
Inverter data processing time = waiting time + data check time
STX
Data sending time
(refer to the following calculation expression)
Inverter data processing time = waiting time + data check time
Data sending time (refer to the following calculation expression)
Inverter data processing time
= waiting time + data check time
(setting×10ms) (12ms)
(set value 10ms)
ACK ENQ
10ms or
10ms or
more required
more required
(refer to the following calculation expression)
(set value 10ms)
ENQ
10ms or
more required
126
PARAMETERS
(12ms)
(12ms)