
—————— Instruction manual ——————
221
6.12.5 Speed reference from encoder input (Tach follower function)
I/O CONFIG
Encoder inputs
[1020]
Select enc 1
[1021]
Select enc 2
[416]
Encoder 1 pulses
[169]
Encoder 2 pulses
[649]
Refresh enc 1
Parameter description
No.
Value
Standard
Configuration
min
max
Factory
American
Factory
Standard
Select enc 1
OFF (0)
Speed ref 1 (1)
Speed ref 2 (2)
Ramp ref 1 (3)
Ramp ref 2 (4)
1020
0
5
OFF (0)
OFF (0)
Select enc 2
OFF (0)
Speed ref 1 (1)
Speed ref 2 (2)
Ramp ref 1 (3)
Ramp ref 2 (4)
1021
0
5
OFF (0)
OFF (0)
Encoder 1 pulses
416
600
9999
1024
1024
Encoder 2 pulses
169
150
9999
1024
1024
Refresh enc 1
Enabled (1)
Disabled (0)
649
0
1
Disabled (0)
Disabled (0)
Refresh enc 2
Enabled (1)
Disabled (0)
652
0
1
Disabled (0)
Disabled (0)
6
5
1
8
9
7
A+
A-
B+
B-
0V
5V
XE1 connector
6
5
1
8
2
7
A+
A-
B+
B-
0V
24
XE2 connector
Encoder 1
Encoder 2
Select enc 2
OFF
Select enc 1
OFF
Figure 6.12.5.1: Tach follower
This configuration allows the use of the encoder inputs, as a speed reference. Compared to an analog input, these
inputs have higher resolution and higher noise immunity.
Using for this purpouse the encoder input (XE1 or XE2 connector), it is necessary to define the destination,
selecting properly the type of speed reference on which it has to interact (
Ramp ref 1
,
Speed ref 1
, etc.)
When the encoder input is used as a speed reference source, using the same encoder input as speed feedback
is disallowed. It is impossible to configure the same speed reference to the encoder input and an analog input.
The function “Tach follower” can be used in accordance with the tabe below:
Speed fbk sel [414]
Encoder 1 as reference
Encoder 2 as reference
Encoder 1
Not available
Not available
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