BENSHAW RSi GM2 Series - Setting the Frequency Reference Using RS-485 Communication; Frequency Hold by Digital Input

Learning Basic Features
59
Lea
rni
890054-00-00
GM2 Series VFD
Setting the Frequency Reference using RS-485 Communication
Set parameter Frq (Frequency reference source) 6 (Int 485). Control the inverter with upper-level
controllers (PCs or PLCs) via RS-485 communications using the (S+/S-) input terminals of the
control board. Refer to 7 RS-485 Communication Features on page 179 for more details.
RS-485 Communication Settings
Group
Code
Name
Setting
Setting Range
Unit
Operation
Frq
Frequency reference source
6
Int 485
0–8
-
CM
01
Built-in communication
inverter ID
-
1
1–250
-
02
Built-in communication
protocol
0
ModBus RTU
0–2
-
1
Reserved
2
LS INV 485
03
Built-in communication speed
3
9600 bps
0–7
-
04
Built-in communication frame
setting
0
D8/PN/S1
0–3
-
1
D8/PN/S2
2
D8/PE/S1
3
D8/PO/S1
Frequency Hold by Digital Input
When using an analog input as the frequency reference, you can apply a hold of the output
frequency at any point. Set a digital input to 21 (Analog Hold). When the input is activated, the
output frequency will be maintained (held constant) until the input is de-activated.
Group
Code
Name
Setting
Setting
Range
Unit
Operation
Frq
Frequency reference
source
2
V1
0–8
-
4
V0
5
I2
In
65~69
Px terminal setting
options
21
Analog
Hold
0–52
-