Mitsubishi Electric FR-F740 EC Instruction Manual page 412

Communication operation and setting
RS485 terminal communication related parameter
Pr. No. Name
RS485 communication
331
station
RS485 communication
332
speed
RS485 communication
333
stop bit length
RS485 communication
334
parity check selection
RS485 communication
335
retry count
RS485 communication
336
check time interval
RS485 communication
337
waiting time setting
RS485 communication
341
CR/LF selection
Stop mode selection at
502
communication error
549
Protocol selection
Operation frequency
779
during communication
error
The above parameters can be set when Pr. 160 = 0.
6 - 262
Initial Setting
Description
Value Range
Set the inverter station number.
(same specifications as Pr. 117)
When "0" is set in Pr. 549
0–31
(Mitsubishi protocol)
0
When "1" is set in Pr. 549
0–247
(Modbus-RTU protocol)
When "2" is set in Pr. 549
0–127
(BACnet protocol)
Used to select the communication speed.
(same specifications as Pr. 118)
3/6/12/24/
When "0" (Mitsubishi protocol) or "1" (Modbus-RTU
48/96/192/
96
protocol) is set in Pr. 549
384
96/192/
When "2" is set in Pr. 549
(BACnet protocol)
384/768
Select stop bit length and data length.
1 0/1/10/11
(same specifications as Pr. 119)
Select the parity check specifications.
2 0/1/2
(same specifications as Pr. 120)
Set the permissible number of retries at occurrence
1 0–10/9999 of a data receive error.
(same specifications as Pr. 121)
RS485 communication can be made, but the
0 inverter will come to an alarm stop in the NET oper-
ation mode.
0 s
Set the interval of communication check time.
0.1–999.8s
(same specifications as Pr. 122)
9999 No communication check
Set the waiting time between data transmission to
0–150ms/
9999 the inverter and response.
9999
(same specifications as Pr. 123)
Select presence/absence of CR/LF.
1 0/1/2
(same specifications as Pr. 124)
At fault
occurrence
Coasts to
0
stop
Deceler-
1
ates to stop
0
Deceler-
2
ates to stop
Continues
3 running at
Pr. 779
0 Mitsubishi inverter (computer link) protocol
0 1
Modbus-RTU protocol
2
BACnet MS/TP protocol
Motor runs at the specified frequency at a
0– 400Hz
communication error.
9999
Motor runs at the frequency used before the
9999
communication error.
Fault At fault
Indication
output removal
Stop
E.SER Output
(E.SER)
After stop Output Stop
E.SER after stop (E.SER)
Automatic
After stop Without
restart
E.SER output
functions
Without Operates
—
output normally
Parameter
Refer to
Parameters referred to
Section
—