Logic blocks, Description of logic operations, Configuration – Rockwell Automation 20D PowerFlex 700S AC Drives with Phase II Control Reference Manual User Manual

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Rockwell Automation Publication PFLEX-RM003E-EN-E - January 2011

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Detailed Drive Operation Chapter 1

Logic Blocks

The logic blocks are used to perform the logical operations AND, NAND, OR,
NOR, XOR, and NXOR on user-specified bits of user-specified parameters.

Description of Logic operations:

AND - When all bits compared are on, the result will be true (1). When one of
the bits compared is off, the result will be false (0).

NAND - When all bits compared are off, the result will be false (0). When one of
the bits compared is off, the result will be true (1).

OR - When one or all of the bits compared are on, the result will be true (1).
When all of the bits compared are off, the result will be false (0).

NOR - When one or all of the bits compared are on, the result will be false (0).
When all of the bits compared are off, the result will be true (1).

XOR (exclusive OR) - When one of the bits compared is on, the result will be
true (1). When all of the bits are on or all of the bits are off, the result will be false
(0).

NXOR - When one of the bits compared is on, the result will be false (0). When
all of the bits are on or all of the bits are off, the result will be true (1).

Configuration:

• Parameter 1061 [Logic Config] - set this parameter to configure the logic

routine in parameters 1063 [Logic 1A Data]…1070 [Logic 2B Bit]. The
result of this logic routine is displayed in parameter 1062 [Logic/Cmpr
State]. There are three configurable logic blocks as displayed above. Each
block can be configured as (AND, NAND, OR, NOR, XOR, or NXOR).
Select the functions as desired. Multiple operation selection for one block
will result in the first selection (LSB) being the active mode.

And,

Nand,

Or, Nor,

Xor,

Nxor

And,

Nand,

Or, Nor,

Xor,

Nxor

And,

Nand,

Or, Nor,

Xor,

Nxor

1062

1063

1065

1067

1069

Logic 1A Data

Logic 1B Data

Logic 2A Data

Logic 2B Data

1064

1066

1068

1070

Logic 1A Bit

Logic 1B Bit

Logic 2A Bit

Logic 2B Bit

Logic/Cmpr State

(Logic 1 Result)

(Logic 3 Result)

(Logic 2 Result)

1061

Logic Config