Mitsubishi Inverter Protocol (Computer Link Communication) - Mitsubishi Electric FR-F820-00077 Instruction Manual

Parameters
5.12.5

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. Upon delivery the FR-F800-
E inverter models are not equipped with the RS-485 terminal block.
Communication specifications
The communication specifications are given below.
Item
Communication protocol
Conforming standard
Connectable units
Communication
Speed
Control procedure
Communication method
Communication
specifications
Waiting time setting
Tab. 5-229: Communication specifications
Communication procedure
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
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.)
Fig. 5-235:
FR-F800
Description
Mitsubishi protocol (computer link)
EIA-485 (RS-485)
1:N (maximum 32 units), setting is 0 to 31 stations
PU connector Selected among 4800/9600/19200/38400 bps
Selected among 300/600/1200/2400/4800/9600/19200/38400/
RS-485 terminals
38400/57600/76800/115200 bps
Asynchronous system
Half-duplex system
Character system ASCII (7 bits or 8 bits can be selected.)
Start bit 1 bit
Stop bit length 1 bit or 2 bits can be selected.
Parity check Check (at even or odd numbers) or no check can be selected.
Error check Sum code check
Terminator CR/LF (presence/absence selectable)
Selectable between presence and absence
Computer
(Data flow)
↓
Inverter
Inverter
(Data flow)
↓
Computer
Schematic diagram of data exchange
(N) Operation via communication and its settings
When data is read
³ ¿
· »
When data is written
Related
Parameter
Pr. 551
⎯
Pr. 117
Pr. 331
Pr. 118
Pr. 332
⎯
⎯
Pr. 119
Pr. 333
⎯
Pr. 119
Pr. 333
Pr. 120
Pr. 334
⎯
Pr. 124
Pr. 341
Pr. 123
Pr. 337
´
Time
I002735E
5 - 469