Rockwell Automation Publication 1426-UM001J-EN-P - August 2019 195
Logic Functions Chapter 7
Operation
•AND
An AND gate output asserts when ALL of its enabled inputs are asserted. 
Disabled inputs are ignored. If only one input is enabled, the logic gate 
output copies the input state.
•NAND
A NAND, or Not-AND, gate output asserts except when ALL of its 
enabled inputs are asserted. Disabled inputs are ignored. If only one input 
is enabled, the logic gate output inverts the input state.
•OR
An OR gate output asserts when ANY of its enabled inputs is asserted. 
Disabled inputs are ignored. If only one input is enabled, the logic gate 
output copies the input state.
•NOR
A NOR, or Not-OR, gate asserts when NONE of its enabled inputs are 
asserted. Disabled inputs are ignored. If only one input is enabled, the logic 
gate output inverts the input state.
•XOR
An XOR, or exclusive-OR, gate asserts when only one of its two inputs is 
asserted. An XOR gate must have two and only two inputs enabled. Both 
inputs must be configured simultaneously or an error results.
•XNOR
An XNOR, or exclusive-NOR, gate asserts when either both of its two 
inputs are asserted or both are de-asserted. An XNOR gate must have two 
and only two inputs enabled. Both inputs must be configured 
simultaneously or an error results.
In general, a logic gate is disabled and its output is de-asserted if none of its inputs 
are enabled. Except for XOR and XNOR gates, any combination of enabled and 
disabled inputs is accepted. The output of a logic gate is not permitted to be used 
as the input to a logic gate.
Setpoint Setup
The tags that are listed in this section configure the operation of each setpoint, 
and are found in the Configuration.Setpoints_1_5
 and 
Configuration.Setpoints_6_10
 tables in the M5 model. The M6 and M8 models 
also have two additional tables for setting up setpoints, 
Configuration.Setpoints_11_15 Data Table
 and 
Configuration.Setpoints_16_20 Data Table
, and a Relative_Setpoint_Interval 
tag in the Configuration.PowerQuality
 table for configuring the sliding reference 
for all setpoints. These tables are in Appendix A
.