ABB ACS 800 Series, Application Manual

Page: 27 / 44

Function blocks
27
SR Type Logical function
Illustration
Operation Set/reset block. Input I1 sets and I2 and I3 reset the output.
- If I1, I2 and I3 are false, the current value remains at the output.
- If I1 is true and I2 and I3 are false, the output is true.
- If I2 or I3 is true, the output is false.
Connections Input I1, I2 and I3: Boolean values
Output (O): 24 bit integer value (23 bits + sign)
SWITCH-B Type Logical function
Illustration
Operation The output is equal to input I2 if input I1 is true and equal to input I3 if input I1 is
false.
Connections Input I1, I2 and I3: Boolean values
Output (O): 24 bit integer value (packed boolean)
I1
I2
I3
SR
O
I1 I2 I3 O (binary) O (value on display)
0 0 0 Output Output
0 0 1 False (All bits 0) 0
0 1 0 False (All bits 0) 0
0 1 1 False (All bits 0) 0
1 0 0 True (All bits 1) -1
1 0 1 False (All bits 0) 0
1 1 0 False (All bits 0) 0
1 1 1 False (All bits 0) 0
I1
I2
I3
SWITCH-B
O
I1 I2 I3 O O (value on display)
0 I2 I3 I3 True = -1
False = 0
1 I2 I3 I2