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129
Communication functions (Pr. 117 to Pr. 124, Pr. 342)
PARAMETERS
3
<Setting>
To make communication between the personal computer and inverter, the initial settings of the communication
specifications must be made to the inverter. Data communication cannot be made if the initial settings are not made
or there is any setting error.
* When making communication, set any value other than 0 in Pr. 122 "communication check time interval".
CAUTION
Always reset the inverter after making the initial settings of the parameters. Communication is disabled
unless the inverter is reset after the communication-related parameter values have been changed.
Parameter
Number
Name
Factory
Setting
Setting Description
117
Communication
station number
00 to 31
Station number specified for communication from the PU connector.
Set the inverter station numbers when two or more inverters are
connected to one personal computer.
118
Communication
speed
192
48 4800bps
96 9600bps
192 19200bps
119
Stop bit length/
data length
1
8
bits
0 Stop bit length 1 bit
1 Stop bit length 2 bits
7
bits
10 Stop bit length 1 bit
11 Stop bit length 2 bits
120
Parity check
presence/
absence
2
0 Absent
1 Odd parity present
2 Even parity present
121
Number of
communication
retries
1
0 to 10
Set the permissible number of retries at occurrence of data receive
error. If the number of consecutive errors exceeds the permissible
value, the inverter will come to an alarm stop (E. PUE).
9999
(65535)
If a communication error occurs, the inverter will not come to an alarm
stop. At this time, the inverter can be coasted to a stop by MRS or
RESET input.
During a communication error (H0 to H5), the minor fault signal (LF) is
given to the open collector output. Allocate the used terminal with any
of Pr. 190 to Pr. 192 and Pr. 195 (output terminal function selection).
122*
Communication
check time
interval
0
0 No communication
0.1 to
999.8s
Set the communication check time [s] interval.
If a no-communication state persists for longer than the permissible
time, the inverter will come to an alarm stop (E. PUE).
9999 Communication check suspension
123
Waiting time
setting
9999
0 to
150ms
Set the waiting time between data transmission to the inverter and
response.
9999 Set with communication data.
124 CR/LF selection 1
0 Without CR/LF
1With CR
2 With CR/LF