Table 2-20 Digital Input Configuration Parameters; Figure 2-17 Digital Input Function Block Example - Honeywell UMC800 Reference Manual

2.19 DI Function Block,
Properties Group Parameter
Address I/O Module
Channel
Example
Figure 2-17 shows a Function Block Diagram using DI function blocks in a basic Series Parallel Circuit.
This is a basic series-parallel circuit. If Limit Switch 1
(LS1) is ON and Limit Switch 2 (LS2) is ON, or
if pushbutton PB1 is ON, then Solenoid 1 is turned ON,
otherwise it is OFF. Note "power flow" can be delivered
in either of two paths to the solenoid.
Equivalent Boolean Logic Expression
A = LS1, B = LS2
D = Output
C = PB1,
UMC 800 Logic
This uses a basic 2 Input AND block
and a 2 Input OR block.
6 Function blocks are used.
3/99
continued

Table 2-20 Digital Input Configuration Parameters

Index#
0
1
A
AND
B
C

Figure 2-17 Digital Input Function Block Example

Function Block Reference Guide
Parameter Description
Address of select I/O Module
Channel on selected I/O Module
If INVERT is selected, OUT = inverse of physical input.
The slash will be present in the CONTACT symbol only
when the invert box is selected on the dialog box. (see
below)
D
OR
Function Blocks
Value or Selection
From 6 to 16
From 1 to 6
LS 1
LS 2
PB1
AND Symbol
OR Symbol
(A * B) + C = D
SOL 1
Coil
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