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Conversion Instructions Section 5-20
5-20-6 16-TO-4 ENCODER – DMPX(77)
Limitations The rightmost two digits of Di must each be between 0 and 3.
All source words must be in the same data area.
DM 6144 to DM 6655 cannot be used for SB, R, or Di.
Description When the execution condition is OFF, DMPX(77) is not executed. When the
execution condition is ON, DMPX(77) determines the position of the highest
ON bit in S, encodes it into single-digit hexadecimal value corresponding to
the bit number of the highest ON bit number, then transfers the hexadecimal
value to the specified digit in R. The digits to receive the results are specified
in Di, which also specifies the number of digits to be encoded.
The following is an example of a one-digit encode operation to digit number 1
of R, i.e., here Di would be 0001.
S: DM 0020
DM 0020 00 HR 1000 0 HR 1100 0 HR 1200 1
DM 0020 01 HR 1001 0 HR 1101 0 HR 1201 0
DM 0020 02 HR 1002 0 HR 1102 0 HR 1202 0
DM 0020 03 HR 1003 0 HR 1103 0 HR 1203 0
DM 0020 04 1 HR 1004 0 HR 1104 0 HR 1204 0
DM 0020 05 1 HR 1005 0 HR 1105 0 HR 1205 0
DM 0020 06 1 HR 1006 0 HR 1106 1 HR 1206 0
DM 0020 07 1 HR 1007 0 HR 1107 0 HR 1207 0
DM 0020 08 0 HR 1008 0 HR 1108 0 HR 1208 0
DM 0020 09 1 HR 1009 0 HR 1109 0 HR 1209 0
DM 0020 10 1 HR 1010 0 HR 1110 0 HR 1210 0
DM 0020 11 0 HR 1011 0 HR 1111 0 HR 1211 0
DM 0020 12 0 HR 1012 0 HR 1112 0 HR 1212 0
DM 0020 13 0 HR 1013 0 HR 1113 0 HR 1213 0
DM 0020 14 0 HR 1014 0 HR 1114 0 HR 1214 0
DM 0020 15 0 HR 1015 1 HR 1115 0 HR 1215 0
15
6
0
Not
Converted
R: HR 10 R+1: HR 11
R+2: HR 12
SB: First source word
IR, SR, AR, DM, EM, HR, TIM/CNT, LR
R: Result word
IR, SR, AR, DM, EM, HR, LR
Ladder Symbols
Operand Data Areas
Di: Digit designator
IR, SR, AR, DM, EM, HR, TIM/CNT, LR, #
DMPX(77)
SB
R
Di
@DMPX(77)
SB
R
Di
Result word
First source word
C
0 0 0 1 0 0 0 1 0 0 0 1 0 1 1 0
C transferred to indicate bit number 12 as
the highest ON bit.
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