Ladder Logic (lad) for S7-300 and S7-400 Programming
INV_I Ones Complement Integer
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3.8 INV_I Ones Complement Integer Symbol INV_I ENO EN IN OUT Parameter Data Type Memory Area Description EN BOOL I, Q, M, L, D Enable input ENO BOOL I, Q, M, L, D Enable output IN INT I, Q, M, L, D Integer input value OUT INT I, Q, M, L, D Ones complement of the integer IN Description INV_I (Ones Complement Integer) reads the content of the IN parameter and performs a Boolean XOR function with the hexadecimal mask W#16#FFFF. This instruction changes every bit to its opposite state. ENO always has the same signal state as EN. Status word BR CC 1 CC 0 OV OS OR STA RLO /FC writes: 1 - - - - 0 1 1 1 Example Q 4.0 I 0.0 MW8 INV_I ENO EN IN OUT MW10 NOT If I0.0 is "1", then every bit of MW8 is reversed, for example: MW8 = 01000001 10000001 results in MW10 = 10111110 01111110. The output Q4.0 is "1" if the conversion is not executed (ENO = EN = 0). Conversion Instructions 3.9 INV_DI Ones Complement Double Integer Ladder Logic (LAD) for S7-300 and S7-400 Programming Reference Manual, 04/2017, A5E41524738-AA 47 3.9 INV_DI Ones Complement Double Integer Symbol INV_DI ENO EN IN OUT Parameter Data Type Memory Area Description EN BOOL I, Q, M, L, D Enable input ENO BOOL I, Q, M, L, D Enable output IN DINT I, Q, M, L, D Double integer input value OUT DINT I, Q, M, L, D Ones complement of the double integer IN Description INV_DI (Ones Complement Double Integer) reads the content of the IN parameter and performs a Boolean XOR function with the hexadecimal mask W#16#FFFF FFFF .This instruction changes every bit to its opposite state. ENO always has the same signal state as EN. Status word BR CC 1 CC 0 OV OS OR STA RLO /FC writes: 1 - - - - 0 1 1 1 Example Q 4.0 I 0.0 MD8 INV_DI ENO EN IN OUT MD12 NOT If I0.0 is "1", then every bit of MD8 is reversed, for example: MD8 = F0FF FFF0 results in MD12 = 0F00 000F. The output Q4.0 is "1" if the conversion is not executed (ENO = EN = 0). Conversion Instructions 3.10 NEG_I Twos Complement Integer Ladder Logic (LAD) for S7-300 and S7-400 Programming 48 Reference Manual, 04/2017, A5E41524738-AA 3.10 NEG_I Twos Complement Integer Symbol NEG_I ENO EN IN OUT Parameter Data Type Memory Area Description EN BOOL I, Q, M, L, D Enable input ENO BOOL I, Q, M, L, D Enable output IN INT I, Q, M, L, D Integer input value OUT INT I, Q, M, L, D Twos complement of integer IN Description NEG_I (Twos Complement Integer) reads the content of the IN parameter and performs a twos complement instruction. The twos complement instruction is equivalent to multiplication by (-1) and changes the sign (for example: from a positive to a negative value). ENO always has the same signal state as EN with the following exception: if the signal state of EN = 1 and an overflow occurs, the signal state of ENO = 0. Status word BR CC 1 CC 0 OV OS OR STA RLO /FC writes: x x x x x 0 x x 1 Example Q 4.0 I 0.0 MW8 NEG_I ENO EN IN OUT MW10 NOT If I0.0 is "1", then the value of MW8 with the opposite sign is output by the OUT parameter to MW10. MW8 = + 10 results in MW10 = - 10. The output Q4.0 is "1" if the conversion is not executed (ENO = EN = 0). If the signal state of EN = 1 and an overflow occurs, the signal state of ENO = 0. Conversion Instructions 3.11 NEG_DI Twos Complement Double Integer Ladder Logic (LAD) for S7-300 and S7-400 Programming Reference Manual, 04/2017, A5E41524738-AA 49 3.11 NEG_DI Twos Complement Double Integer Symbol NEG_DI ENO EN IN OUT Parameter Data Type Memory Area Description EN BOOL I, Q, M, L, D Enable input ENO BOOL I, Q, M, L, D Enable output IN DINT I, Q, M, L, D Double integer input value OUT DINT I, Q, M, L, D Twos complement of IN value Description NEG_DI (Twos Complement Double Integer) reads the content of the IN parameter and performs a twos complement instruction. The twos complement instruction is equivalent to multiplication by (- 1) and changes the sign (for example: from a positive to a negative value). ENO always has the same signal state as EN with the following exception: if the signal state of EN = 1 and an overflow occurs, the signal state of ENO = 0. Status word BR CC 1 CC 0 OV OS OR STA RLO /FC writes: x x x x x 0 x x 1 Example Q 4.0 I 0.0 MD8 NEG_DI ENO EN IN OUT MD12 NOT If I0.0 is "1", then the value of MD8 with the opposite sign is output by the OUT parameter to MD12. MD8 = + 1000 results in MD12 = - 1000. The output Q4.0 is "1" if the conversion is not executed (ENO = EN = 0). If the signal state of EN = 1 and an overflow occurs, the signal state of ENO = 0. Conversion Instructions 3.12 NEG_R Negate Floating-Point Number Ladder Logic (LAD) for S7-300 and S7-400 Programming 50 Reference Manual, 04/2017, A5E41524738-AA 3.12 NEG_R Negate Floating-Point Number Symbol NEG_R ENO EN IN OUT Parameter Data Type Memory Area Description EN BOOL I, Q, M, L, D Enable input ENO BOOL I, Q, M, L, D Enable output IN REAL I, Q, M, L, D Floating-point number input value OUT REAL I, Q, M, L, D Floating-point number IN with negative sign Description NEG_R (Negate Floating-Point) reads the contents of the IN parameter and changes the sign. The instruction is equivalent to multiplication by (-1) and changes the sign (for example: from a positive to a negative value). ENO always has the same signal state as EN. Status word BR CC 1 CC 0 OV OS OR STA RLO /FC writes: x - - - - 0 x x 1 Example Q 4.0 I 0.0 MD8 NEG_R ENO EN IN OUT MD12 NOT If I0.0 is "1", then the value of MD8 with the opposite sign is output by the OUT parameter to MD12. MD8 = + 6.234 results in MD12 = - 6.234. The output Q4.0 is "1" if the conversion is not executed (ENO = EN = 0). Conversion Instructions 3.13 ROUND Round to Double Integer Ladder Logic (LAD) for S7-300 and S7-400 Programming Reference Manual, 04/2017, A5E41524738-AA 51 3.13 ROUND Round to Double Integer Symbol ROUND ENO EN IN OUT Parameter Data Type Memory Area Description EN BOOL I, Q, M, L, D Enable input ENO BOOL I, Q, M, L, D Enable output IN REAL I, Q, M, L, D Value to round OUT DINT I, Q, M, L, D IN rounded to nearest whole number Description ROUND (Round Double Integer) reads the content of the IN parameter as a floating-point number and converts it to a double integer (32-bit). The result is the closest integer number ("Round to nearest"). If the floating-point number lies between two integers, the even number is returned. The result is output by the parameter OUT. If an overflow occurred ENO will be "0". Status word BR CC 1 CC 0 OV OS OR STA RLO /FC writes: x - - x x 0 x x 1 Example Q 4.0 I 0.0 MD8 ROUND ENO EN IN OUT MD12 NOT If I0.0 is "1", then the content of MD8 is read as a floating-point number and converted to the closest double integer. The result of this "Round to nearest" function is stored in MD12. The output Q4.0 is "1" if an overflow occurred or the instruction was not executed (I0.0 = 0). Conversion Instructions 3.14 TRUNC Truncate Double Integer Part Ladder Logic (LAD) for S7-300 and S7-400 Programming 52 Reference Manual, 04/2017, A5E41524738-AA 3.14 TRUNC Truncate Double Integer Part Symbol TRUNC ENO EN IN OUT Parameter Data Type Memory Area Description EN BOOL I, Q, M, L, D Enable input ENO BOOL I, Q, M, L, D Enable output IN REAL I, Q, M, L, D Floating-point value to convert OUT DINT I, Q, M, L, D Whole number part of IN value Description TRUNC (Truncate Double Integer) reads the content of the IN parameter as a floating-point number and converts it to a double integer (32-bit). The double integer result of the ("Round to zero mode") is output by the parameter OUT. If an overflow occurred, ENO will be "0". Status word BR CC 1 CC 0 OV OS OR STA RLO /FC writes: x - - x x 0 x x 1 Example Q 4.0 I 0.0 MD8 TRUNC ENO EN IN OUT MD12 NOT If I0.0 is "1", then the content of MD8 is read as a real number and converted to a double integer. The integer part of the floating-point number is the result and is stored in MD12. The output Q4.0 is "1" if an overflow occurred, or the instruction was not executed (I0.0 = 0). Conversion Instructions 3.15 CEIL Ceiling Ladder Logic (LAD) for S7-300 and S7-400 Programming Reference Manual, 04/2017, A5E41524738-AA 53 3.15 CEIL Ceiling Symbol CEIL ENO EN IN OUT Parameter Data Type Memory Area Description EN BOOL I, Q, M, L, D Enable input ENO BOOL I, Q, M, L, D Enable output IN REAL I, Q, M, L, D Floating-point value to convert OUT DINT I, Q, M, L, D Lowest greater double integer Description CEIL (Ceiling) reads the contents of the IN parameter as a floating-point number and converts it to a double integer (32-bit). The result is the lowest integer which is greater than the floating-point number ("Round to + infinity"). If an overflow occurs, ENO will be "0". Status word BR CC 1 CC 0 OV OS OR STA RLO /FC writes*: X - - X X 0 X X 1 writes**: 0 - - - - 0 0 0 1 * Function is executed (EN = 1) ** Function is not executed (EN = 0) Example Q 4.0 I 0.0 MD8 CEIL ENO EN IN OUT MD12 NOT If I0.0 is 1, the contents of MD8 are read as a floating-point number which is converted into a double integer using the function Round. The result is stored in MD12. The output Q4.0 is "1" if an overflow occured or the instruction was not processed (I0.0 = 0). Conversion Instructions 3.16 FLOOR Floor Ladder Logic (LAD) for S7-300 and S7-400 Programming 54 Reference Manual, 04/2017, A5E41524738-AA 3.16 FLOOR Floor Symbol FLOOR ENO EN IN OUT Parameter Data Type Memory Area Description EN BOOL I, Q, M, L, D Enable input ENO BOOL I, Q, M, L, D Enable output IN REAL I, Q, M, L, D Floating-point value to convert OUT DINT I, Q, M, L, D Greatest lower double integer Description FLOOR (Floor) reads the content of the IN parameter as a floating-point number and converts it to a double integer (32-bit). The result is the greatest integer component which is lower than the floating-point number ("Round to - infinity"). If an overflow occurred ENO will be "0". Status word BR CC 1 CC 0 OV OS OR STA RLO /FC writes: x - - x x 0 x x 1 Example Q 4.0 I 0.0 MD8 FLOOR ENO EN IN OUT MD12 NOT If I0.0 is "1", then the content of MD8 is read as a floating-point number and converted to a double integer by the round to - infinity mode. The result is stored in MD12. The output Q4.0 is "1" if an overflow occurred, or the instruction was not executed (I0.0 = 0). Ladder Logic (LAD) for S7-300 and S7-400 Programming Reference Manual, 04/2017, A5E41524738-AA 55 4 Counter Instructions 4.1 Overview of Counter Instructions Area in Memory Counters have an area reserved for them in the memory of your CPU. This memory area reserves one 16-bit word for each counter address. The ladder logic instruction set supports 256 counters. The counter instructions are the only functions that have access to the counter memory area. Count Value Bits 0 through 9 of the counter word contain the count value in binary code. The count value is moved to the counter word when a counter is set. The range of the count value is 0 to 999. You can vary the count value within this range by using the following counter instructions: • S_CUD Up-Down Counter • S_CD Down Counter • S_CU Up Counter • ---( SC ) Set Counter Coil • ---( CU ) Up Counter Coil • ---( CD ) Down Counter Coil Counter Instructions 4.1 Overview of Counter Instructions Ladder Logic (LAD) for S7-300 and S7-400 Programming 56 Reference Manual, 04/2017, A5E41524738-AA Bit Configuration in the Counter You provide a counter with a preset value by entering a number from 0 to 999, for example 127, in the following format: C#127. The C# stands for binary coded decimal format (BCD format: each set of four bits contains the binary code for one decimal value). Bits 0 through 11 of the counter contain the count value in binary coded decimal format. The following figure shows the contents of the counter after you have loaded the count value 127, and the contents of the counter cell after the counter has been set. irrelevant Count value in BCD (0 to 999) 1 1 1 0 0 1 0 0 1 0 0 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 7 2 1 1 1 1 1 1 1 1 0 0 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 irrelevant Binary count value Counter Instructions 4.2 S_CUD Up-Down Counter Ladder Logic (LAD) for S7-300 and S7-400 Programming Reference Manual, 04/2017, A5E41524738-AA 57 4.2 S_CUD Up-Down Counter Symbol S_CUD S Q CV PV R CV_BCD CU CD English German C no. Z no. ZAEHLER S Q DUAL ZW R DEZ ZV ZR Parameter English Parameter German Data Type Memory Area Description C no. Z no. COUNTER C Counter identification number; range depends on CPU CU ZV BOOL I, Q, M, L, D Count up input CD ZR BOOL I, Q, M, L, D Count down input S S BOOL I, Q, M, L, D Set input for presetting counter PV ZW WORD I, Q, M, L, D or constant Enter counter value as C# 999 PV ZW WORD I, Q, M, L, D Value for presetting counter R R BOOL I, Q, M, L, D Reset input CV DUAL WORD I, Q, M, L, D Current counter value, hexadecimal number CV_BCD DEZ WORD I, Q, M, L, D Current counter value, BCD coded Q Q BOOL I, Q, M, L, D Status of the counter Description S_CUD (Up-Down Counter) is preset with the value at input PV if there is a positive edge at input S. If there is a 1 at input R, the counter is reset and the count is set to zero. The counter is incremented by one if the signal state at input CU changes from "0" to "1" and the value of the counter is less than "999". The counter is decremented by one if there is a positive edge at input CD and the value of the counter is greater than "0". If there is a positive edge at both count inputs, both instructions are executed and the count value remains unchanged. If the counter is set and if RLO = 1 at the inputs CU/CD, the counter will count once in the next scan cycle, even if there was no change from a positive to a negative edge or viceversa. The signal state at output Q is "1" if the count is greater than zero and "0" if the count is equal to zero. Counter Instructions 4.2 S_CUD Up-Down Counter Ladder Logic (LAD) for S7-300 and S7-400 Programming 58 Reference Manual, 04/2017, A5E41524738-AA Status word BR CC 1 CC 0 OV OS OR STA RLO /FC writes: - - - - - x x x 1 Note Avoid to use a counter at several program points (risk of counting errors). Example S_CUD S Q CV PV R CV_BCD CU CD Q 4.0 I 0.0 I 0.1 I 0.2 I 0.3 MW10 C10 If I0.2 changes from "0" to "1", the counter is preset with the value of MW10. If the signal state of I0.0 changes from "0" to "1", the value of counter C10 will be incremented by one - except when the value of C10 is equal than "999". If I0.1 changes from "0" to "1", C10 is decremented by one - except when the value of C10 is equal to "0". Q4.0 is "1" if C10 is not equal to zero. Counter Instructions 4.3 S_CU Up Counter Ladder Logic (LAD) for S7-300 and S7-400 Programming Reference Manual, 04/2017, A5E41524738-AA 59 4.3 S_CU Up Counter Symbol S_CU PV Q CV R CV_BCD CU S Yüklə 1,39 Mb. Dostları ilə paylaş:
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