User Manual 08/2003 Edition

02.99
Select
block number
(AnwSatz)
Start byte
(STB)
Siemens AG 2003 All rights reserved
SIMODRIVE POSMO A User Manual (POS1) – 08.03 Edition
4 Communications via PROFIBUS DP
4.2 Process data (PZD area)
The master selects the traversing block to be started by entering the
required block number into this control byte.
The selection becomes effective, if:
If neither a traversing block nor program is active.
The program or the traversing block has been completely executed.
The program or the traversing block was canceled by an external
signal or a fault.
The start byte is compared with a bit mask ”SMStart” (P86:x) programmed
in a traversing block.
This means that the program sequence can be influenced via the start
byte.
P86:x (high byte) = 0: If there is no function
The block is not influenced by the start byte.
P86:x (high byte) > 0: Function available
The block can only be started if the bits, set in P86:x (high byte), are
also set in the start byte.
The program control can be additionally influenced via P80:x bit 6
and bit 7.
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