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Description of parameters
3.4.23 Mitsubishi inverter protocol (computer link communication)
You can perform parameter setting, monitoring, etc. from the PU connector of the converter using the Mitsubishi inverter
protocol (computer link communication).
(1) Communication
The communication specifications are given below.
Item
Communication protocol
Conforming standard
Number of connectable devices
Communication speed
PU connector
Control procedure
Communication method
Character system
Start bit
Stop bit length
Communication
Parity check
Error check
Terminator
Waiting time setting
(2) Communication procedure
Computer
(Data flow)
Converter
Converter
∗1
(Data flow)
Computer
If a data error is detected and a retry must be made, perform retry operation with the user program. The converter stops retrying and outputs the LF signal
when the number of consecutive retries exceeds the parameter setting.
On receipt of a data error occurrence, the converter returns reply data 3) to the computer again. The converter stops retrying and outputs the LF signal when
the number of consecutive data errors exceeds the number set in the parameter.
98
Check (with even or odd parity) or no check can be selected.
When data is read
∗2
1)
4)
2)
3)
When data is written
Description
Mitsubishi protocol (computer link)
EIA-485(RS-485)
1:N (maximum 32 units), setting is 0 to 31 stations
Selected among 4800/9600/19200/38400bps
Asynchronous
Half-duplex
ASCII (7 bits or 8 bits can be selected.)
1bit
1 bit or 2 bits can be selected.
Sum code check
CR/LF (presence/absence selectable)
Selectable between presence and absence
Data communication between the computer and
converter is made in the following procedure.
1) Request data is sent from the computer to the
5)
converter. (The converter will not send data
Time
unless requested.)
2) After waiting for the waiting time,
3) The converter sends reply data to the computer
in response to the computer request.
4) After waiting for the converter data processing
time,
5) An answer from the computer in response to
reply data 3) of the converter is transmitted.
(Even
communication is made properly.)
if
5)
is
not
sent,
Related
Parameters
Pr. 117
Pr. 118
Pr. 119
Pr. 119
Pr. 120
Pr. 124
Pr. 123
subsequent
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