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. Upon delivery the FR-F800-
E inverter models are not equipped with the RS-485 terminal block.
The communication specifications are given below.
Waiting time setting
Tab. 5-229: Communication specifications
Data communication between the computer and inverter is made in the following procedure.
³ Request data is sent from the computer to the inverter. (The inverter will not send data unless
· 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.)
Mitsubishi protocol (computer link)
1:N (maximum 32 units), setting is 0 to 31 stations
Selected among 4800/9600/19200/38400 bps
Selected among 300/600/1200/2400/4800/9600/19200/38400/
ASCII (7 bits or 8 bits can be selected.)
Stop bit length
1 bit or 2 bits can be selected.
Check (at even or odd numbers) or no check can be selected.
Sum code check
CR/LF (presence/absence selectable)
Selectable between presence and absence
Schematic diagram of data exchange
(N) Operation via communication and its settings
When data is read
When data is written
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