Mitsubishi Electric FR-A700 Technical Manual page 408

[Pr.] Name
Number of PU
121
*3
communication retries
PU communication check
122
time interval
PU communication waiting
123
*3
time setting
PU communication CR/LF
124
*3
selection
Stop mode selection at
502
communication error
549 Protocol selection
*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
*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
Initial Value
1
A700 F700
9999
E700 D700
0
9999
1
0
1
is valid for only communication from the RS-485 terminals.
A700 F700
.
E700
Setting Range
Set the permissible number of retries at occurrence of a data
receive error. If the number of consecutive errors exceeds
0 to 10 the permissible value, the inverter will come to tirp.
Valid only in Mitsubishi inverter (computer link operation)
protocol
Even if a communication error occurs, the inverter will not
9999
come to trip.
A700 F700
No PU connector communication
E700 D700
0
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).
Set the interval of communication check time.
0.1 to 999.8s If a no-communication state persists for longer than the
permissible time, the inverter will come to trip.
9999 No communication check
Set the waiting time between data transmission to the
0 to 150ms
inverter and response.
9999 Set with communication data.
0 Without CR/LF
1 With CR
2 With CR/LF
At Fault
Occurrence
Coasts to
0, 3 *6
stop
Decelerates
1
to stop
Decelerates
2
to stop
0 Mitsubishi inverter (computer link operation) protocol
1 Modbus-RTU protocol
442
PARAMETER
Description
*5
Fault
Indication At Fault Removal
Output
E.PUE Output Stop (E.PUE)
Output
After stop
after Stop (E.PUE)
E.PUE
stop
After stop Without Automatic restart
E.PUE output functions