3 |
Input Data Area Tab
The input data area describes data received over the network by the Slave module from the PROFIBUS Master. These inputs are mapped, using the Input Data Area tab, into specific memory locations in the PLC where the Slave module resides.
| PROFIBUS Slave Module’s Input Data Area Parameters |
Area | A |
Type | Data type of area being defined. Valid types are Digital In, Analog In, and Empty. The default value is |
| Empty. |
Size | Describes the size of the data area on the network. Set to 0 and |
| ranges: |
If Type is set to Analog In (Word):
If Type is set to Digital In (Byte):
Notes: The total number of input bytes for all entries cannot exceed 244.
A value of 0 sets Type to Empty.
Units | This |
| If Type is set to Empty or Digital In: Byte |
| If Type is set to Analog In: Word |
|
|
Ref | Location in PLC memory where the received data is mapped. This field is |
Address | is a consumed range and must be a |
| Type is set to Digital In and the number of bytes (Size) is odd, an address in discrete memory must be |
| used: %I, %Q, %G, %M, or %T. |
| Default: |
| For Digital In, next available address in %I |
| For Analog In, next available address in %AI |
Length | The length of the reference mapped to the area. Allowable ranges: |
For discrete memories (in bits), 0, 8, 16 ... X For register memories (in words), 0, 1, 2 ... X
where X is the required length to hold the entire data area. The default value is the space required to map bytes specified by the entries in Type and Size.
Note: If an input data area is defined (Type and Size are specified) but Length is set to 0, data received by the Slave is ignored.
Chapter 3 Configuration |