IMPULSE•G+/VG+ Series 4 Technical Manual
November 2022
Page 157
5.6.6 Serial Communication
The VFD uses terminals R+/R-, S+/S- to communicate the MODBUS RTU (RS-485/422) protocol. Cycle power
after changing any of these parameters.
Table 5-85: Serial Communication Parameter Settings
Parameter
Display
Function
Range
Default
H05-01
Serial Comm Adr
Serial communication address
00–FF
1F
H05-02
Serial Baud Rate
Baud rate
0–8
3
0 1200 bps
1 2400 bps
2 4800 bps
3 9600 bps
4 19.2 kbps
5 38.4 kbps
6 57.6 kbps
7 76.8 kbps
8 115.2 kbps
H05-03
Serial Com Sel
Parity type
0–2
0
0 No Parity
1 Even Parity
2 Odd Parity
H05-04
Serial Fault Set
Serial fault stopping method
0–3
0
0 Decel to Stop
1 Coast to Stop
2 Fast Stop
3 Alarm Only
H05-05
Serial Flt Dtct
Serial Fault Detection
0, 1
1
0 Disabled
1 Enabled
H05-06
Transmit WaitTIM
Send waiting time
5–65 ms
5
H05-07
RTS Control Sel
RTS Control
0, 1
1
0 Disabled
RTS is always on
1 Enabled
RTS is ON only when sending
H05-09
CE Detect Time
Time required to detect a communications
error. Adjustment may be needed when
networking several VFDs.
0.0–10.0 sec
2.0
H05-10
CommReg 25h Unit
Units for the output voltage monitor value in
Modbus Register 0025H.
0, 1
0
0 0.1V
1 1V
H05-11
Enter CommandSel
Enter command function via serial.
0, 1
1
0 Enter Required
VFD requires an Enter command before
accepting any parameter changes.
1 No EnterRequired
Parameter changes are activated
immediately without the Enter command.
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