Allen-Bradley MicroLogix 1200 Reference Manual

1 Publication 1762-RM001C-EN-P
Chapter 11
Conversion Instructions
The conversion instructions multiplex and de-multiplex data and perform
conversions between binary and decimal values.
Using Decode and
Encode Instructions
Addressing Modes and File Types can be used as shown in the following
table:
Instruction Used To: Page
DCD - Decode 4 to 1-of-16 Decodes a 4-bit value (0 to 15), turning on the
corresponding bit in the 16-bit destination.
11-2
ENC - Encode 1-of-16 to 4 Encodes a 16-bit source to a 4-bit value.
Searches the source from the lowest to the
highest bit and looks for the first set bit. The
corresponding bit position is written to the
destination as an integer.
11-3
FRD - Convert From Binary
Coded Decimal
Converts the BCD source value to an integer and
stores it in the destination.
11-4
TOD - Convert to Binary Coded
Decimal
Converts the integer source value to BCD format
and stores it in the destination.
11-8
Table 11.1 Conversion Instructions Valid Addressing Modes and File Types
For definitions of the terms used in this table see Using the Instruction Descriptions on page4-2.
Parameter
Data Files Function Files
CS - Comms IOS - I/O
Address
Mode
(1)
(1) See Important note about indirect addressing.
Address
Level
O I S B T, C, R N ST L MG, PD RTC HSC PTO, PWM STI EII BHI MMI DAT TPI Immediate Direct Indirect Bit Word Long Word Element
Source •• ••• • ••
Destination •• •••
• ••
IMPORTANT
You cannot use indirect addressing with: S, ST, MG, PD,
RTC, HSC, PTO, PWM, STI, EII, BHI, MMI, DAT, TPI, CS,
IOS, and DLS files.

Allen-Bradley MicroLogix 1200 Specifications

General

Brand	Allen-Bradley
Model	MicroLogix 1200
Category	Control Unit
Language	English