Basics
53
All elements of the data type ARRAY OF BOOL are lumped together in a block and allocated in a memory area
reserved for bits, beginning at a 16-bit word address.
All other elements are lumped together and allocated one after the other in a block in a memory area reserved
for 16-bit words.
For details on working with DUTs and predefined system DUTs, please refer to the online help.
1.4.3.5
DUTs with overlapping elements
How DUTs with overlapping elements occupy memory:
All elements of the same data type (BOOL, WORD, INT, DWORD, DINT, REAL and STRINGs with the same,
common string length) are each lumped together and allocated one after the other beginning from a common
starting address. Arrays are also allocated to this common starting address.
The following conditions apply to this starting address: If DUT consists of BOOL or ARRAY OF BOOL type
elements, it is stored in a memory area reserved for bits; otherwise it is stored in a memory area reserved for
16-bit words.
To avoid ambiguity during initialization no initialization
is allowed
.
The following default initializations are
executed:
BOOL:
FALSE
WORD, INT, DWORD, DINT: 0
REAL:
0.0
STRING:
''
(i.e. the address occupied by the maximum string length is initialized with the maximum
length of the string that is greater or equal to zero. The rest of the string is initialized with zeros.)
Also, all element variables of the data type STRING must be located at the end of the declaration.
NOTE
In general, you should pay exact attention to how memory area is occupied by the data types used.
Especially when using STRINGs, note that their particular way of occupying memory allows them to
be repeatedly overwritten with the help of other elements.
Ensure the maximum string length and the current string length are valid values before using string
commands.
For details on working with DUTs and predefined system DUTs, please refer to the online help.
1.4.4 Array
Arrays
An array is a group of variables which all have the
same
elementary data type and that are grouped together,
one after the other, in a continuous data block. This variable group itself is a variable and must hence be
declared for this reason. In the program you can either use the whole array or individual array elements.
Содержание FP Series
Страница 27: ...Chapter 1 Basics ...
Страница 60: ...Chapter 2 Data transfer instructions ...
Страница 62: ...Chapter 3 Arithmetic instructions ...
Страница 88: ...Chapter 4 Bitwise Boolean instructions ...
Страница 93: ......
Страница 94: ...Chapter 5 Bit shift instructions ...
Страница 100: ...Bit shift instructions 99 Part II IEC Instructions LD ...
Страница 102: ...Bit shift instructions 101 Part II IEC Instructions LD ...
Страница 103: ......
Страница 104: ...Chapter 6 Comparison instructions ...
Страница 106: ...Comparison instructions 105 Part II IEC Instructions LD ...
Страница 108: ...Comparison instructions 107 Part II IEC Instructions LD ...
Страница 114: ...Chapter 7 Conversion instructions ...
Страница 136: ...Conversion instructions 135 Part II IEC Instructions Body with and without EN ENO ...
Страница 242: ...Conversion instructions 241 Part II IEC Instructions Body ...
Страница 244: ...Conversion instructions 243 Part II IEC Instructions Body ...
Страница 253: ......
Страница 254: ...Chapter 8 Selection instructions ...
Страница 261: ......
Страница 262: ...Chapter 9 String instructions ...
Страница 280: ...String instructions 279 Part II IEC Instructions LD ...
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Страница 282: ...Chapter 10 Date and time instructions ...
Страница 306: ...Chapter 11 Bistable instructions ...
Страница 311: ......
Страница 312: ...Chapter 12 Edge detection instructions ...
Страница 315: ......
Страница 316: ...Chapter 13 Counter instructions ...
Страница 324: ...Chapter 14 Timer instructions ...
Страница 341: ......
Страница 342: ...Chapter 15 Arithmetic instructions ...
Страница 360: ...Arithmetic instructions 359 Part III FP Instructions LD ST IF DF start THEN F35_INC increment_value END_IF ...
Страница 362: ...Arithmetic instructions 361 Part III FP Instructions LD ST IF DF start THEN F36_DINC increment_value END_IF ...
Страница 384: ...Arithmetic instructions 383 Part III FP Instructions LD ST IF DF start THEN F37_DEC decrement_value END_IF ...
Страница 431: ...Arithmetic instructions 430 Part III FP Instructions LD ST IF start THEN F87_ABS abs_value END_IF ...
Страница 433: ...Arithmetic instructions 432 Part III FP Instructions ST IF start THEN F88_DABS abs_value END_IF ...
Страница 449: ...Arithmetic instructions 448 Part III FP Instructions LD ST IF DF start THEN F85_NEG negotiate_value END_IF ...
Страница 508: ...Chapter 16 Bistable instructions ...
Страница 512: ...Chapter 17 Bitwise Boolean instructions ...
Страница 555: ......
Страница 556: ...Chapter 18 Bit shift instructions ...
Страница 603: ......
Страница 604: ...Chapter 19 Comparison instructions ...
Страница 622: ...Chapter 20 Conversion instructions ...
Страница 687: ...Conversion instructions 686 Part III FP Instructions LD ...
Страница 702: ...Chapter 21 Counter instructions ...
Страница 711: ......
Страница 712: ...Chapter 22 Data transfer via communication ports ...
Страница 785: ......
Страница 786: ...Chapter 23 Data transfer via network ...
Страница 798: ...Data transfer via network 797 Part III FP Instructions LD ...
Страница 805: ......
Страница 806: ...Chapter 24 Data transfer within the PLC ...
Страница 866: ...Chapter 25 Date and time instructions ...
Страница 877: ......
Страница 878: ...Chapter 26 Selection Instructions ...
Страница 883: ......
Страница 884: ...Chapter 27 Edge detection instructions ...
Страница 890: ...Chapter 28 High speed counter instructions ...
Страница 913: ......
Страница 914: ...Chapter 29 Timer instructions ...
Страница 937: ......
Страница 938: ...Chapter 30 Process control instructions ...
Страница 966: ...Process control instructions 965 Part III FP Instructions ...
Страница 970: ...Chapter 31 FP e display instructions ...
Страница 979: ......
Страница 980: ...Chapter 32 System register instructions ...
Страница 997: ......
Страница 998: ...Chapter 33 Special instructions ...
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Страница 1008: ...Chapter 34 Program execution control instructions ...
Страница 1020: ...Chapter 35 Pulse output instructions ...
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Страница 1092: ...Chapter 36 Analog unit instructions ...
Страница 1133: ......
Страница 1134: ...Chapter 37 GT panel instructions ...
Страница 1138: ...Chapter 38 High speed counter instructions ...
Страница 1164: ...High speed counter instructions 1163 Part IV Tool Instructions ...
Страница 1172: ...Chapter 39 Pulse output instructions ...
Страница 1177: ...Pulse output instructions 1176 Part IV Tool Instructions LD ...
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Страница 1185: ...Pulse output instructions 1184 Part IV Tool Instructions LD ...
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Страница 1198: ...Pulse output instructions 1197 Part IV Tool Instructions LD ...
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Страница 1246: ...Chapter 40 Appendix Programming Information ...
Страница 1306: ...Appendix Programming Information 1305 ...