Table of Contents
Advertisement
Image 8-1
FB SIWA_FTA call parameters.
8.4 Call parameters for FB SIWA_FTA
The call parameters of the FB SIWA_FTA are described in the following section.
The call parameters are defined as variables in the scales DB when delivered. It is
possible to define the call parameters with other variables of the same type.
While calling the FB SIWA_FTA, the number of the instance DB to be generated
must be defined.
8.4.1
ADDR:= 256, Input, INT
SIWAREX FTA requires 16 bytes in the input and output range of the SIMATIC
CPU for operation. The ADDR parameter must correspond wit the definition in the
HW configuration.
8.4.2
DB_SCALE:= 12, Input, INT
A scale DB must be defined for every scale, in which the parameter of the
SIWAREX FTA and the current actual value are found. The number of the DB can
be selected as desired. DB12 has been defined as the scale DB in the project
planning package. In addition, the UDT12 is also provided as a template for
creating block modules.
SIWAREX FTA
Programming in SIMATIC STEP 7
8-161
Advertisement
Table of Contents
