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PLC data types and addressing

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PLC data types and addressing

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plc, PLC Applications, Programmable Logic Controllers, Programmable, Logic, Controllers, PROGRAMMING,
gates, COUNTERS, Timers,LOGIC CIRCUITS, INTERNAL RELAYS, ARITHMETIC FUNCTIONS, Application, Data Types and Addressing,

plc, PLC Applications, Programmable Logic Controllers, Programmable, Logic, Controllers, PROGRAMMING,
gates, COUNTERS, Timers,LOGIC CIRCUITS, INTERNAL RELAYS, ARITHMETIC FUNCTIONS, Application, Data Types and Addressing,

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PLC data types and addressing

  1. 1. 7. Data Types and Addressing 7.1 Data Types
  2. 2. Data Types Summary Each elementary data type has a defined length. The following table lists the elementary data types. Summary Type and Description Size in Bits Format Options Range and Number Notation (lowest to highest value)_ Example BOOL(Bit) 1 Boolean text TRUE/FALSE TRUE BYTE (Byte) 8 Hexadecimal Binary B#16#0 to B#16#FF 2#0 to 2#1111_1111 L B#16#10 L byte#16#10 L2#1011_1010 WORD (Word) 16 Binary number Hexadecimal number BCD Decimal number unsigned 2#0 to 2#1111_1111_1111_1111 W#16#0 to W#16#FFFF C#0 to C#999 B#(0.0) to B#(255.255) L 2#0001_0000_0000_0000 L W#16#1000 L word#16#1000 L C#998 L B#(10,20) L byte#(10,20) DWORD (Double word) 32 Binary number Hexadecimal 2#0 to 2#1111_1111_1111_1111 2#1000_0001_0001_1000_ 1011_1011_0111_1111
  3. 3. number Decimal number unsigned 1111_1111_1111_1111 DW#16#0000_0000 to DW#16#FFFF_FFFF B#(0,0,0,0) to B#(255,255,255,255) L DW#16#00A2_1234 L dword#16#00A2_1234 L B#(1, 14, 100, 120) L byte#(1,14,100,120) INT (Integer) 16 Decimal number signed -32768 to 32767 L 1 DINT (Integer, 32 bits) 32 Decimal number signed L#-2147483648 to L#2147483647 L L#1 REAL (Floating- point number) 32 IEEE Floating- point number Upper limit: 3.402823e+38 Lower limit: 1.175 495e- 38 L 1.234567e+13 S5TIME (SIMATIC time) 16 S7 time in steps of 10 ms (default) S5T#0H_0M_0S_10MS to S5T#2H_46M_30S_0MS and S5T#0H_0M_0S_0MS L S5T#0H_1M_0S_0MS L S5TIME#0H_1H_1M_0S_ 0MS TIME (IEC time) 32 IEC time in steps of 1 ms, integer signed - T#24D_20H_31M_23S_6 48MS to T#24D_20H_31M_23S_6 47MS L T#0D_1H_1M_0S_0MS L TIME#0D_1H_1M_0S_0M S DATE (IEC date) 16 IEC date in steps of 1 day D#1990-1-1 to D#2168-12-31 L D#1996-3-15 L DATE#1996-3-15 TIME_OF_D AY (Time) 32 Time in steps of 1 ms TOD#0:0:0.0 to TOD#23:59:59.999 L TOD#1:10:3.3 L TIME_OF_DAY#1:10:3.3 CHAR (Character) 8 ASCII characters 'A','B' etc. L 'E'
  4. 4. 7.2 Addressing Storage areas are Inputs, Outputs, Timers, Counters, Memory (Local Variables, Global Variables) , Data Blocks Pointers. - Inputs I(x, y) ---------------------- x = Byte address, y = Bit address Bytes 0, 1, 2, ..., 255 Bits 0, 1, 2, …, 7 IBx (Input Byte) ---------- Ex.: IB0 = I0.0, I0.1, …,I0.7 IWx (Input Word) -------- Ex.: IW0 = (IB0, IB1) = (I0.0, I0.1, …,I0.7, I1.0, I1.1,…, I1.7) IDx (Input DWord) ------ Ex.: ID0 = (IW0, IW2) = (IB0, IB1, IB2, IB3) = (I0.0, I0.1,…,I0.7, I1.0, I1.1,…,I1.7, I2.0, I2.1, I2.7, I3.0, I3.1, I3.7) ___________________________________________ - Outputs Q(x, y) ---------------------- x = Byte address, y = Bit address Bytes 0, 1, 2, ..., 255 Bits 0, 1, 2, …, 7 QBx (Output Byte) ---------- Ex.: QB0 = Q0.0, Q0.1, …,Q0.7 QWx (Output Word) -------- Ex.: QW0 = (QB0, QB1) = (Q0.0, Q0.1, …,Q0.7, Q1.0, Q1.1,…, Q1.7) QDx (Output DWord) ------ Ex.: QD0 = (QW0, QW2) = (QB0, QB1, QB2, QB3) =(Q0.0, Q0.1,…,Q0.7, Q1.0, Q1.1,…,Q1.7, Q2.0, Q2.1, Q2.7, Q3.0, Q3.1, Q3.7) _____________________________________ - Memory (M = Markers or Global Memory, L = Local Memory) M(x, y) ---------------------- x = Byte address, y = Bit address Bytes 0, 1, 2, ..., 255 Bits 0, 1, 2, …, 7 MBx (Memory Byte) ---------- Ex.: MB0 = M0.0, M0.1, …,M0.7 MWx (Memory Word) -------- Ex.: MW0 = (MB0, MB1) = (M0.0, M0.1, …,M0.7, M1.0, M1.1,…, M1.7) MDx (Memory DWord) ----- Ex.: MD0 = (MW0, MW2)= (MB0, MB1, MB2, MB3) =(M0.0, M0.1,…,M0.7, M1.0, M1.1,…,M1.7, M2.0, M2.1, M2.7, M3.0, M3.1, M3.7)
  5. 5. - Timers T1, T2, T3, …, Tn (According to the available number of timers) _____________________________________ - Counters C1, C2, C3,…, Cn (According to the available number of counters) _____________________________________ - Data Blocks

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