Siemens TIA Portal: SET: Set byte array instruction parameters and working principle-EEWORLD

Collect

illustrate

You can use the "Set bit array" instruction to set the signal state of bits in a specified area to "1". Use a pointer in the S_BIT parameter to define the start of the range. If the pointer points to a memory area for external I/O, the instruction is not executed. In the N parameter, specify the number of bits to be set in the specified area. If the N parameter has the value "0", calling the instruction has no effect.

The instruction is only executed if the MCR bit is "1". If the signal state of the MCR bit is "0", the bits in the specified area remain unchanged.

Note
Parameter N
In the TIA Portal, you can also interconnect the elements of the data blocks in parameter N.

parameter

The following table lists the parameters for the "Set Bit Array" instruction:

parameter	statement	Data Types	Storage Area	illustrate
S_BIT	Input	POINTER	I, Q, M, D	Pointer to the first bit in the region where the bits are to be set. For cross-region indirect register addressing, this pointer must be specified in double-word format.
N	Input	INT	I, Q, M, D, L, P or constant	Number of bits to set

Example

The following example illustrates how this directive works:

STL	illustrate
CALL SET	// Call the "set bit array" instruction
S_BIT := P#M0.0	// Pointer to the first bit to be set (M0.0)
N := 10	//Number of bits to set

In this example, this instruction will set 10 bits in the range from M0.0 to M1.2.

illustrate

Use the "Set Byte Array" instruction to set the signal state of a bit in a specified byte area to "1". Define the start of the array in the S_BYTE parameter. Define the size of the array by specifying the number of bits to be set in the N parameter of the instruction.

Note
The value of parameter N must be an integer multiple of 8 (for example, 8, 16, 24, etc.).

The pointer specified in the S_BYTE parameter must refer to the external I/O memory area (P). Since the "P" memory area is accessed as bytes, words or double words, the pointer in the S_BYTE parameter must point to an operand that corresponds to the byte limit, that is, the pointer bit number must be "0".

Description
The signal state of the corresponding bit in the process image output (Q) is reset to "0".

Calling the Set Byte Array instruction will have no effect if any of the following conditions exist:

The pointer in the S_BYTE parameter does not refer to an external I/O memory area (P).

The operand referenced by the pointer in parameter S_BYTE is not a whole byte.

The value of parameter N is not an integer multiple of 8.

The signal state of the MCR bit is "0".

parameter

The following table lists the parameters of the "Set Byte Array" instruction:

parameter	statement	Data Types	Storage Area	illustrate
S_BYTE	Input	POINTER	P or constant	Pointer to the first byte of the array whose bits are to be set For cross-region indirect register addressing, this pointer must be specified in double-word format.
N	Input	INT	I, Q, M, D, L, P or constant	The size of the array to be set Specify the array in multiples of 8 (e.g., 8, 16, 24, etc.).

Example

The following example illustrates how this directive works:

STL	illustrate
CALL SETI	// Call instruction.
S_BYTE := P#2.0	// Pointer to the first byte of the range (P2.0)
N := 16	//Number of bits to set

In the example, this instruction sets 2 bytes (16 bits) ranging from P2.0 to P3.7 (I/O output).

SET: Set a bit array

Description You can use the "Set bit array" instruction to set the signal state of bits in a specified range to "1". Use a pointer in the S_BIT parameter to define the start of the range. If the pointer points to a memory area for external I/O, the instruction is not executed. In the N parameter, specify the number of bits to be set in the specified area. If the N parameter has the value "0", calling the instruction has no effect.

Note Parameter N In the TIA Portal, you can also interconnect elements of a data block at parameter N.

parameter

The following table lists the parameters of this command:

parameter	statement	Data Types	Storage Area	illustrate
S_BIT	Input	POINTER	I, Q, M, D	Pointer to the first bit in the region where the bits are to be set. For cross-region indirect register addressing, this pointer must be specified in double-word format.
N	Input	INT	I, Q, M, D, L, P or constant	Number of bits to set

Example

The following example illustrates how this directive works:

SCL
SET(S_BIT := P#M0.0,
N := 10);

In this example, this instruction sets 10 bits in the range M0.0 to M1.1.

SET: Set a bit array

illustrate

The "Set bit array" instruction sets the signal state of the bits in the specified area to "1". In the parameter S_BIT, you define the start of the range with a pointer. If the pointer points to a memory area of an external I/O, the instruction is not executed. In the parameter N, you specify the number of bits to be set in the specified area. If the value of parameter N is "0", calling the instruction has no effect.

The instruction is only executed if the MCR bit is "1". If the signal state of the MCR bit is "0", the bits in the specified area remain unchanged.

Note
Parameter N
At parameter N, you can also interconnect elements of a data block.

parameter

The following table lists the parameters for the "Set Bit Array" instruction:

parameter	statement	Data Types	Storage Area	illustrate
EN	Input	BOOL	I, Q, M, D, L	Enable input
ENO	Output	BOOL	I, Q, M, D, L	Enable output
S_BIT	Input	POINTER	I, Q, M, D	Pointer to the first bit in the region where the bits are to be set. For cross-region indirect register addressing, this pointer must be specified in double-word format.
N	Input	INT	I, Q, M, D, L, P or constant	Number of bits to set

Example

The following example illustrates how this directive works:

If the signal state of operand TagIn is "1", the instruction sets 10 bits in the area M0.0 to M1.2.

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