Mitsubishi Electric FR-A500 Instruction Manual page 136

For the instruction codes of the parameters, refer to the instruction code list in the appendices.
REMARKS
For computer link operation, set the value "8888" as 65520 (HFFF0) and the value "9999" as 65535
(HFFFF).
Parameter Number Factory Setting
117
118
119
120
121
122*
123
124
342
* 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.
Parameter
Description
Number
Communication
117
station number
Communication
118
speed
Stop bit length/
119
data length
Parity check
120 presence/
absence
Number of
121 communication
retries
Communication
122 check time
interval
Waiting time
123
setting
CR LF
presence/
124
absence
selection
2
E PROM write
342*
selection
* 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
2
previously in E PROM.
When changing parameter values frequently, set "1" in Pr. 342 to choose write to RAM.
2
The Pr. 342 " E PROM write selection" setting is also valid when the communication option is fitted.
Performing frequent parameter write with E
Setting Range
0 0 to 31
192 48, 96, 192
Data length 8
1
Data length 7
2 0, 1, 2
1 0 to 10, 9999
0<9999> 0, 0.1 to 999.8s, 9999
9999 0 to 150ms, 9999
1 0, 1, 2
0 0, 1
Setting
Station number specified for communication from the PU connector. Set the inverter
0 to 31 station numbers when two or more inverters are connected to one personal
computer.
48 4800 bps
96 9600 bps
192 19200 bps
0 Stop bit length 1 bit
8 bits
1 Stop bit length 2 bits
10 Stop bit length 1 bit
7 bits
11 Stop bit length 2 bits
0 Absent
1 Odd parity present
2 Even parity present
Set the permissible number of retries at occurrence of 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 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
9999(65535)
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).
0 No communication
0.1 to 999.8 Set the communication check time [s] interval.
If a no-communication state persists for longer than the permissible time, the
9999
inverter will come to an alarm stop.
0 to 150ms Set the waiting time between data transmission to the inverter and response.
9999 Set with communication data.
0 Without CR LF
1 With CR Without LF
2 With CR LF
When parameter write is performed from the computer, parameters are written to
0
2
E PROM.
When parameter write is performed from the computer, parameters are written to
1
RAM.
2
PROM write set will shorten the life of the E
0, 1
10, 11
Description
127
PARAMETERS
2
PROM.
4