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Program Memory addresses start at 00000 and run until the capacity of Program
Memory has been exhausted. The first word at each address defines the instruc-
tion. Any definers used by the instruction are also contained in the first word.
Also, if an instruction requires only a single bit operand (with no definer), the bit
operand is also programmed on the same line as the instruction. The rest of the
words required by an instruction contain the operands that specify what data is
to be used. When converting to mnemonic code, all but ladder diagram instruc-
tions are written in the same form, one word to a line, just as they appear in the
ladder diagram symbols. An example of mnemonic code is shown below. The
instructions used in it are described later in the manual.
Address
Instruction
Operands
00000
LD
HR
0001
00001
AND
00001
00002
OR
00002
00003
LD NOT
00100
00004
AND
00101
00005
AND LD
00102
00006
MOV(21)
000
DM
0000
00007
CMP(20)
DM
0000
HR
00
00008
LD
25505
00009
OUT
00501
00010
MOV(21)
DM
0000
DM
0500
00011
DIFU(13)
00502
00012
AND
00005
00013
OUT
00503
The address and instruction columns of the mnemonic code table are filled in for
the instruction word only. For all other lines, the left two columns are left blank. If
the instruction requires no definer or bit operand, the operand column is left
blank for first line. It is a good idea to cross through any blank data column
spaces (for all instruction words that do not require data) so that the data column
can be quickly scanned to see if any addresses have been left out.
When programming, addresses are automatically displayed and do not have to
be input unless for some reason a different location is desired for the instruction.
When converting to mnemonic code, it is best to start at Program Memory ad-
dress 00000 unless there is a specific reason for starting elsewhere.
4-4-3 Ladder Instructions
The ladder instructions are those instructions that correspond to the conditions
on the ladder diagram. Ladder instructions, either independently or in combina-
tion with the logic block instructions described next, form the execution condi-
tions upon which the execution of all other instructions are based.
Basic Ladder Diagrams
Section 4-4
Содержание SYSMAC C200HS
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Страница 2: ...C200HS Programmable Controllers Operation Manual Revised February 2002...
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Страница 379: ...371 SR word Corresponding key s Bit 279 03 04 05 3 06 07 VER 08 09 Monitoring Operation and Modifying Data Section 7 1...
Страница 470: ...468 Programmer Program Date Page Word Contents Notes Word Contents Notes Data Storage...
Страница 471: ...469 Programmer Program Date Page TC address T or C Set value Notes TC address T or C Set value Notes Timers and Counters...