Allen-Bradley MicroLogix 1200 Reference Manual

Publication 1762-RM001C-EN-P
11-2 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
Table 11.2 Execution Time for the DCD Instruction
Controller When Rung Is:
True False
MicroLogix 1200 1.9
µ
s0.0
µ
s
MicroLogix 1500 0.9
µ
s0.0
µ
s
Table 11.3 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

Allen-Bradley MicroLogix 1200 Specifications

General

Series	MicroLogix 1200
Type	Programmable Logic Controller (PLC)
Mounting	DIN rail or panel mount
Programming Language	Ladder Logic
Programming Software	RSLogix 500
I/O Points	Up to 40
Communication Ports	RS-232, RS-485
Memory	6 KB user memory
Power Supply	24V DC or 120/240V AC
Expansion	Supports expansion I/O modules
Operating Temperature	0°C to 55°C (32°F to 131°F)
Dimensions	90 mm x 110 mm
Weight	0.5 kg (1.1 lbs)