Operational modes

To measure SIMATIC TDC system numeric and binary values must be transported be

tween the TDC system and the PC, which means that internal variables of the TDC sys

tem may be visualized and recorded. For recording purposes two different software pack

ages are supported by the ibaFOB-TDCexp card:

 SD-TDC-lite:

All values to be measured by ibaPDA have to be manually programmed in CFC

charts of the control unit. Changes of signals require a change in this chart. Up to

16 process telegrams are to be defined per card which transport the values to

ibaPDA containing 32 analog plus 32 digital variables each. Structure and length of

the process telegrams are determined by ibaPDA. Up to 4 cards in a PC are sup

ported by ibaPDA.

In addition the ibaPDA-Technostring (non-structured ASCII-string with a length of up

to 512 bytes) can be configured.

 SD-TDC-Request:

The definition of the signals to be measured is independent of the connected con

trol unit system. All changes are done in ibaPDA. ibaPDA supports the functionality

to select the internal TDC variables by their names, i.e. the chart, function block and

the connector names. To do that for every TDC CPU special service function blocks

must be included in the CFC chart of the control unit.

The information about the variable names (address books) is transferred from the

TDC CPU to the ibaPDA system directly via the ibaFOB-TDCexp card.

ibaPDA supports up to 4 cards with up to 50 processor connections per card and

additionally, the ibaPDA-Technostring.