Section 5: Configuration of the frequency converter
Only two inputs W1 and W2 can be used. Then par. 2.32 defining W3 should
be set to
"0" -Off
, and parameters 2.30 (W1) and 2.31 (W2) should be
assigned any two input signals, e.g.
"5" -DI5
and
"6" -DI6
.
The method of selecting a constant speed depending on the combination of
W1 and W2 inputs is presented in the table below:
Table 5.6. Constant speed control configuration for 2 input signals W1 and W2
W1
W2
Constant speed no.
0
0
The system does not work with any of the defined constant
speeds; referencing-unit A (par. 2.2) or B (par. 2.3) is active,
depending on the par. 2.1.
1
0
Constant speed No. 1, by default 10 Hz (para. 2.33)
0
1
Constant speed No. 2, by default 20 Hz (para. 2.34)
1
1
Constant speed No. 3, by default 25 Hz (para. 2.35)
Note:
The digital input DI4 is set by default as the external reset source, therefore
before using it to set the constant speeds, parameter 3.70 should be changed
to
"0" - Disable.
36
TWERD Power Electronics
