¶ General Description
Read a value from the TXD (transmitting) buffer.
The TXD buffer size is 64 bytes.
This function operates using the TXD buffer.
¶ Graphical Representation
| Function Menu | Block Diagram |
|---|---|
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¶ Inputs
| Name | Type | Description |
|---|---|---|
index |
int32 |
Position in the TXD buffer from which reading should start. The first element of the buffer has an index of 0. |
size |
int32 |
Number of bytes to read from the TXD buffer. Valid values range from 1 to 4. |
¶ Outputs
| Name | Type | Description |
|---|---|---|
value0 |
see note | Read value 0. |
value1 |
see note | Read value 1. |
| ... | .. | ... |
valueX |
see note | Read value X. The number of outputs is regulated by the "Number of Outputs" setting. |
The function's behavior depends on the data type:
➜ If the
valueoutput is connected to a variable of type Float and the Type setting is int32/float, the function reads data from memory using the IEEE754 standard. This method should be used for values transmitted in Float format (e.g., value 12.6).➜ Otherwise, the function reads data as Int32.
Conversion is performed automatically using the hidden functions FROM_FLOAT and TO_FLOAT.
¶ Settings
| Name | Description |
|---|---|
| Number of Outputs | This setting regulates the number of outputs valueN. |
| Byte Order | The byte order used when copying buffer elements to the value output.For example, if RXD = [01,02,03,04,05,...], index = 0, size = 4:“Little-endian” value = 0x04030201. “Big-endian”value = 0x01020304. “Big-endian (2 bytes)”value = 0x03040102. |
| Signed | If this flag is set, the function will interpret the read data as a negative number if the most significant bit is 1. |