Mitsubishi Electric FR-A700 Series, Technical Manual

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442
PARAMETER
*1 When [ Pr.549 = 1] (Modbus-RTU protocol), setting range is the values in parentheses.
*2 For Modbus-RTU protocol, the data length is fixed to 8bit and the stop bit length is [ Pr.120 ] setting. (Refer to page 459)
*3 Modbus-RTU protocol is invalid.
*4 The Modbus-RTU of is valid for only communication from the RS-485 terminals.
*5 Monitoring and parameter read are available during the communication with [ Pr.122 PU communication check time interval =0], but
inverter outputs fault as soon as operation mode is switched to NET operation mode. When operation mode is the Network
operation mode at powering ON, communication error (E.PUE) occurs after first communication. To operate or write parameter
using communication, set [
Pr.122 = 9999] or set a large value to [ Pr.122 ]. (The setting value depends on the program of the
computer.) (Refer to page 449)
*6 Setting value 3 is only available in .
[Pr.] Name Initial Value Setting Range Description
121
*3
Number of PU
communication retries
1
0 to 10
Set the permissible number of retries at occurrence of a data
receive error. If the number of consecutive errors exceeds
the permissible value, the inverter will come to tirp.
Valid only in Mitsubishi inverter (computer link operation)
protocol
9999
Even if a communication error occurs, the inverter will not
come to trip.
122
PU communication check
time interval 9999
0
0
No PU connector communication
RS485 communication is available. Note that a
communication fault would occur if mode is switched to
another operation mode with command source (NET mode at
initial setting).
*5
0.1 to 999.8s
Set the interval of communication check time.
If a no-communication state persists for longer than the
permissible time, the inverter will come to trip.
9999 No communication check
123
*3
PU communication 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 *3
PU communication CR/LF
selection
1
0 Without CR/LF
1 With CR
2 With CR/LF
502
Stop mode selection at
communication error
0
At Fault
Occurrence
Indication
Fault
Output
At Fault Removal
0, 3
*6
Coasts to
stop
E.PUE Output Stop (E.PUE)
1
Decelerates
to stop After stop
E.PUE
Output
after
stop
Stop (E.PUE)
2
Decelerates
to stop After stop
E.PUE Without
output Automatic restart
functions
549 Protocol selection 1
0 Mitsubishi inverter (computer link operation) protocol
1 Modbus-RTU protocol
A700 F700
E700 D700
A700 F700
E700 D700
A700 F700
E700