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Mitsubishi Electric FR-E520 Instruction Manual Page 150

Transistorized inverter.
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*1. Indicate a control code. (Refer to page 140.)
*2. The inverter station numbers may be set between H00 and H1F (stations 0 and 31)
in hexadecimal.
*3. When the Pr. 123 "waiting time setting" setting is other than "9999", create the
communication request data without "waiting time" in the data format. (The number
of characters is decremented by 1.)
*4. CR, LF code
When data is transmitted from the computer to the inverter, codes CR (carriage return)
and LF (line feed) are automatically set at the end of a data group on some computers.
In this case, setting must also be made on the inverter according to the computer. Also,
the presence and absence of the CR and LF codes can be selected using Pr. 124.
(4) Data definitions
1)Control codes
Signal
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 228.)
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 228.)
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: When the Pr. 123 "waiting time setting" setting is other than "9999", create the
communication request data without "waiting time" in the data format. (The
number of characters is decremented by 1.)
ASCII Code
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)
Description
Inverter data processing time
= waiting time + data check time
(setting×10ms) (12ms)
140
PARAMETERS

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