![Johnson Controls Penn VFD68BBB Скачать руководство пользователя страница 91](http://html1.mh-extra.com/html/johnson-controls/penn-vfd68bbb/penn-vfd68bbb_technical-bulletin_2023903091.webp)
VFD68 Variable Frequency Drives
91
Using the Modbus RTU communication protocol, you can set the communication operation or parameter using
the operation panel on the VFD68 drive. These parameters can be set when P.160 = 0.
Table 86: Parameters for ModBus RTU RS485 Communications
Parameter
Number
Name
Default
Range
P.117
PU
communication
station number
0
0
No reply to the master
1
1.
When Modbus RTU communication is performed from the master with address 0 (station number 0) set, broadcast
communication is selected and the VFD does not send a response message. When a response from the VFD is
necessary, set a value other than 0 in P.117. Some functions are invalid for broadcast communication.
1 to 247
VFD station number specification
Set the VFD station numbers when two or more VFDs are
connected to one computer.
P.118
PU
communication
speed
96
48, 96,
192, 384
Communication speed
The setting value x 100 equals the communication speed.
For example, if the communication setting is 96, the
communication speed is 9600 bps.
P.120
PU
communication
parity check
2
0
Without parity check; Stop bit length: 2 bits
1
With odd parity check; Stop bit length: 1 bit
2
With even parity check; Stop bit length: 1 bit
P.122
2
2.
Specifications differ according to the date assembled.
PU
communication
check time
interval
9999
0
0.1 to
999.8
9999
P.343
Communication
error count
0
___
Displays the number of communication errors during
Modbus RTU communication (reading only)
P.502
Stop mode
selection at
communication
error
0
At Fault
Occurrence
Indication
Fault
Output
At Fault
Removal
0
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
P.549
Protocol
selection
0
0
VFD (computer link operation) protocol
1
Modbus RTU protocol