131
PARAMETERS
4
z For the data codes of the parameters, refer to the data code list in the appendices.
* When making communication, set any value other than 0 in Pr. 122 "communication check time interval".
<Setting>
To make communication between the personal computer and inverter, the communication specifications
must be set to the inverter initially. If initial setting is not made or there is a setting fault, data transfer cannot
be made.
Note: After making the initial setting of the parameters, always reset the inverter. After you have changed the
communication-related parameters, communication cannot be made until the inverter is reset.
* When you have set write to RAM, powering off the inverter clears the parameter values that have been
changed. Therefore the parameter values available when power is switched on again are those stored
previously in E
2
PROM.
When changing parameter values frequently, set "1" in Pr. 342 to choose write to RAM.
The Pr. 342 " E
2
PROM write selection" setting is also valid when the communication option is fitted.
Performing frequent parameter write with E
2
PROM write set will shorten the life of the E
2
PROM.
REMARKS
For computer link operation, set the value "8888" as 65520 (HFFF0) and the value "9999" as 65535
(HFFFF).
Parameter Number Factory Setting Setting Range
117 0 0 to 31
118 192 48, 96, 192
119 1
Data length 8 0, 1
Data length 7 10, 11
120 2 0, 1, 2
121 1 0 to 10, 9999
122* 0 0, 0.1 to 999.8s, 9999
123 9999 0 to 150ms, 9999
124 1 0, 1, 2
342 0 0, 1
Parameter
Number
Description Setting Description
117
Communication
station number
0 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
48 4800 bps
96 9600 bps
192 19200 bps
119
Stop bit length/
data length
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
0 Absent
1 Odd parity present
2 Even parity present
121
Number of
communication
retries
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.
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 RES input. During a
communication error (H0 to H5), the minor fault signal (LF) is switched on. Allocate
the used terminal with any of Pr. 190 to Pr. 195 (output terminal function selection).
122
Communication
check time
interval
0 No communication
0.1 to 999.8 Set the communication check time [s] interval.
9999
If a no-communication state persists for longer than the permissible time, the
inverter will come to an alarm stop.
123
Waiting time
setting
0 to 150ms Set the waiting time between data transmission to the inverter and response.
9999 Set with communication data.
124
CR • LF
presence/
absence
selection
0 Without CR • LF
1 With CR
2 With CR • LF
342
E
2
PROM write
selection
0
When parameter write is performed from the computer, parameters are written to
E
2
PROM.
1
When parameter write is performed from the computer, parameters are written to
RAM.
