(N) Operation via communication and its settings
Parameters
5 - 612
5.15.5
Mitsubishi inverter protocol (computer link communication)
Parameter settings and monitoring are possible by using the Mitsubishi inverter protocol (computer
link communication) via inverter PU connector and the RS-485 terminals.
Communication specifications
The communication specifications are given below.
Communication procedure
Data communication between the computer and inverter is made in the following procedure.
Request data is sent from the computer to the inverter. (The inverter will not send data unless
requested.)
After waiting for the waiting time,
The inverter sends reply data to the computer in response to the computer request.
After waiting for the inverter data processing time,
An answer from the computer in response to reply data (
) of the inverter is transmitted.
(Even if (
) is not sent, subsequent communication is made properly.)
Item
Description
Related
Parameter
Communication protocol
Mitsubishi protocol (computer link)
Pr. 551
Conforming standard
EIA-485 (RS-485)
⎯
Connectable units
1:N (maximum 32 units), setting is 0 to 31 stations
Pr. 117
Pr. 331
Communication
Speed
PU connector
Selected among 4800/9600/19200/38400 bps
Pr. 118
RS-485 terminals
Selected among 300/600/1200/2400/4800/9600/19200/38400/
38400/57600/76800/115200 bps
Pr. 332
Control procedure
Asynchronous system
⎯
Communication method
Half-duplex system
⎯
Communication
specifications
Character system
ASCII (7 bits or 8 bits can be selected.)
Pr. 119
Pr. 333
Start bit
1 bit
⎯
Stop bit length
1 bit or 2 bits can be selected.
Pr. 119
Pr. 333
Parity check
Check (at even or odd numbers) or no check can be selected.
Pr. 120
Pr. 334
Error check
Sum code check
⎯
Terminator
CR/LF (presence/absence selectable)
Pr. 124
Pr. 341
Waiting time setting
Selectable between presence and absence
Pr. 123
Pr. 337
Tab. 5-268:
Communication specifications
I002735E
Fig. 5-309:
Schematic diagram of data exchange
↓
↓
Time
Computer
(Data flow)
(Data flow)
Computer
Inverter
Inverter
When data is read
When data is written
Содержание FR-A800
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Страница 30: ...Related manuals Introduction 1 8 ...
Страница 122: ...Connection of stand alone option units Installation and wiring 2 92 ...
Страница 180: ...Basic operation procedure JOG operation Basic operation 4 32 ...
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Страница 954: ...Measurement of main circuit voltages currents and powers Precautions for maintenance and inspection 7 20 ...
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