243 Publication 1766-RM001A-EN-P - October 2008
Chapter
12
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…15), turning on the
corresponding bit in the 16-bit destination.
244
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.
245
FRD - Convert From Binary
Coded Decimal
Converts the BCD source value to an integer and
stores it in the destination.
246
TOD - Convert to Binary Coded
Decimal
Converts the integer source value to BCD format
and stores it in the destination.
250
Conversion Instructions Valid Addressing Modes and File Types
For definitions of the terms used in this table see Using the Instruction Descriptions on page 92.
Parameter
Data Files Function Files
CS - Comms
IOS - I/O
DLS - Data Log
Address
Mode
(1)
Address Level
O
I
S
B
T, C, R
N
F
ST
L
MG, PD
RI/RIX
PLS
RTC
HSC
PTOX, PWMX
STI
EII
BHI
MMI
LCD
Immediate
Direct
Indirect
Bit
Word
Long Word
Element
Source •• ••• • • ••
Destination • • • • • •
• ••
(1) See Important note about indirect addressing.
IMPORTANT
You cannot use indirect addressing with: S, MG, PD, RTC, HSC, PTOX,
PWMX, STI, EII, BHI, MMI, CS, IOS, and DLS files.
efesotomasyon.com - Allen Bradley,Rockwell,plc,servo,drive
To Next Page
Loading...
Need help?
General
