E - VAE ProSys sro

6.5 Text registers (Text call/ picture call via PLC)The basic address of this function block is the "Address of message data words" resp. "Message register". Theother registers are located on the following addresses."PLC address message register"/ "Message register"+00 Message register+01 Histogram register+02 Reserve+03 Text number register (with MT-30, MT-40, MT-60) resp.Picture number register (with MT-45, MT-91, MT-121)+04 Time register (binary coded)+04 Seconds+05 Minute+06 Hour+07 Day+08 Month+09 YearMessage register (change text/ picture change via PLC)MT-30, MT-40, MT-60MT-45, MT-91, MT-121Function: Text call by the PLC program Picture call by the PLC programOperation:Entry of the text number into the messageregister by the PLC programEntry of the picture number into themessage register by the PLC programAt inequality the MTcarries out the followingactivities:At equality:The MT reads the registersComparison of the new value with the previousDisplay of the textDisplay of the pictureAcknowledge of the message register. Message registers is written to zero*Writing of the current text number into thetext number registerNo processingWriting of the current picture number intothe picture number register* As a result of the acknowledgement with the value zero it is not possible to recall the basic mask via themessage register; for this the bit "change into basic mask" (see. control words) must be set.History registerFunction: transfer of a text into the historyThe procedure is the same as with the message register. For simultaneously continuous messages a FIFO buffermust be installed in the PLC (see also "fault bit processing").E112Process display and control/ Device Manual/ Issue: 07.01