Initial Settings And Specifications Of Rs-485 Communication (Pr. 117 To Pr. 124, Pr. 331 To Pr. 337, Pr. 341, Pr. 549) - Mitsubishi Electric FR-A720-0.4K Instruction Manual

Communication operation and setting
4.24.3 Initial settings and specifications of RS-485 communication
(Pr. 117 to Pr. 124, Pr. 331 to Pr. 337, Pr. 341, Pr. 549)
Pr.116
Used to perform required settings for communication between the inverter and personal computer.
page 235
Pr.125 There are two different communications: communication using the PU connector of the inverter and
page 280
communication using the RS-485 terminals.
Pr.299
You can perform parameter setting, monitor, etc. from the PU connector or RS-485 terminals of the inverter
page 253
using the Mitsubishi inverter protocol (computer link communication).
Pr.338
page 304 To make communication between the personal computer and inverter, initialization of the communication
Pr.340
specifications must be made to the inverter.
page 303
Data communication cannot be made if the initial settings are not made or there is any setting error.
Pr.548
page 340
[PU connector communication related parameter]
Pr.550
page 304
Parameter
Number
PU communication station
117
number
118 PU communication speed
PU communication stop bit
119
length
PU communication parity
120
check
Number of PU
121
communication retries
PU communication check
122
time interval
PU communication waiting
123
time setting
PU communication CR/LF
124
presence/absence selection
314
Name
Initial Value
0
192
1
2
1
9999
9999
1
Setting Range
Specify the inverter station number.
Set the inverter station numbers when two or
0 to 31
more inverters are connected to one
personal computer.
Set the communication speed.
The setting value × 100 equals the
48, 96, 192, 384 communication speed.
For example, the communication speed is
19200bps when the setting value is "192".
Stop bit length
0 1bit
1 2bit
10 1bit
11 2bit
0 Without parity check
1 With odd parity check
2 With even parity check
Set the permissible number of retries at
occurrence of a data receive error. If the
0 to 10 number of consecutive errors exceeds the
permissible value, the inverter will come to
an alarm stop.
If a communication error occurs, the inverter
9999
will not come to an alarm stop.
0 No PU connector communication
Set the interval of communication check time.
If a no-communication state persists for
0.1 to 999.8s
longer than the permissible time, the inverter
will come to an alarm stop.
9999 No communication check
Set the
0 to 150ms
transmission to the inverter and response.
9999 Set with communication data.
0 Without CR/LF
1 With CR
2 With CR/LF
Description
Data length
8bit
7bit
waiting time between data