Allen-Bradley MicroLogix 1100 Instruction Set Reference Manual

Publication 1763-RM001C-EN-P - October 2009
202 Conversion Instructions
DCD - Decode 4 to
1-of-16
Instruction Type: output
The DCD instruction uses the lower four bits of the source word to set
one bit of the destination word. All other bits in the destination word are
cleared. The DCD instruction converts the values as shown in the table
below:
DCD
Decode 4 to 1 of 16
Source N7:0
0000h<
Dest N7:1
0000000000000000<
DCD
Execution Time for the DCD Instruction
Controller When Rung Is:
True False
MicroLogix 1100 25.68 μs 0.87 μs
Decode 4 to 1-of-16
Source Bits Destination Bits
15 to 04 03 02 01 00 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
x 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0
x 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0
x 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0
x 01000000000000010000
x 01010000000000100000
x 01100000000001000000
x 01110000000010000000
x 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0
x 1 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0
x 1 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0
x 1 0 1 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0
x 11000001000000000000
x 11010010000000000000
x 11100100000000000000
x 11111000000000000000
x = not used
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Allen-Bradley MicroLogix 1100 Specifications

General

Processor	32-bit
Programming Software	RSLogix 500
Mounting	DIN rail or panel mount
Power Supply	24V DC
Type	Compact PLC
Digital Inputs	12
Digital Outputs	8
Analog Inputs	4 (depending on model)
Analog Outputs	Optional with expansion module
Programming Language	Ladder Logic
Operating Temperature	0 to 55 °C (32 to 131 °F)
Series	MicroLogix