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1/03 UDC 6300 Process Controller Product Manual 187

5.16 Logic Gate Operation

Introduction

The UDC6300 Logic Gate function lets you configure up to 5 Dual-Input

Logic Gates. Each gate can be one of the eight gate types listed below

including two comparators:

NOR

AND

NAND

XOR

XNOR

These gates have two Digital input sources and one Digital output use.

B<A

B>A

These comparator gates have two Analog input sources and one Digital

output use with input B having a fixed hysteresis band of 0.1% of input B

span.

Gate configuration

Refer to Section 3 - Configuration under Set Up group “ADVANCED

MATH” to make your choices for the following function prompts:

GATE TYPE

INPUT A SOURCE

INPUT B SOURCE

OUTPUT USE

for each gate you want to configure.

Gate Operation

Section 4 - Definitions contains information which defines how the

different gates operate. In Digital Logic there are only two states that can

be present “0” -OFF or “1” -ON. Section 4 lists the types of gates

available along with their truth tables. These tables indicate what happens

to the output of each gate with regard to the state of the inputs. The rules

and regulations are listed in Table 5-30.

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