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Computer Link Operation Setting
3
INVERTER FUNCTIONS
3.7 Computer Link Operation Setting
3.7.1 Communication settings (Pr. 331 to Pr. 337, Pr. 341)
!
!!
!Communication-related parameters
•
Refer to page 87 for the instruction codes.
!
!!
!Communication specifications
You can perform computer link operation from the RS-485 connector of the
inverter by RS-485 communication (PU operation mode).
POINT
•When performing operation or parameter write, set "1" (PU operation mode) in
Pr. 79 "operation mode selection", or if Pr. 79 = "0" (factory setting), switch to the
PU operation mode by RS-485 communication (refer to page 87) or switch to the
PU operation mode by pressing of the operation panel (refer to page 42).
•When making communication, set any value other than 0 in Pr. 336
"communication check time interval".
Parameter Name
Setting
Range
Factory Setting
Reflection
Timing
331
Communication
station number
0 to 31 0 After reset
332 Communication speed 48, 96, 192 96 After reset
333 Stop bit length 0, 1, 10, 11 0 After reset
334
Parity check
presence/absence
0, 1, 2 1 After reset
335
Number of
communication retries
0 to 10, 9999 1 Immediately
336
Communication check
time interval*
0, 0.1 to 999s,
9999
9999 Immediately
337 Wait time setting
0 to 150ms,
9999
9999 After reset
341 CR/LF selection 0, 1, 2 1 After reset
Item Computer
Conforming standard RS-485 Standard
Number of inverters connected 1:N (maximum 32)
Communication speed Selected between 19200, 9600 and 4800bps
Control protocol Asynchronous
Communication method Half-duplex
Communication
specifications
Character system ASCII (7 bits/8 bits) selectable
Stop bit length Selectable between 1 bit and 2 bits.
Terminator CR/LF (presence/absence selectable)
Check system
Parity check Selectable between presence (even/odd) and absence
Sumcheck Presence
Wait time setting Selectable between presence and absence
REMARKS
•For computer link operation, set 65520 (HFFF0) as the value "8888" and 65535 (HFFFF) as "9999".
•Refer to page 38 for wiring.
•For the data codes of the parameters, refer to the "parameter data codes for computer link
operation using RS-485 communication" (page 184).
PU
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