Siemens S7-300 Installation Manual page 138

&RPPLVVLRQLQJ
3URJUDPPLQJ VWDWXVFRQWURO YLD 352),%86
As an alternative to the MPI interface, you can program the CPU or execute the
Status and Modify functions of the PG via the PROFIBUS-DP interface.
1RWH
The use of the Status and Modify functions via the PROFIBUS-DP interface
extends the DP cycle.
&RQVWDQW %XV &\FOH 7LPH
As of 67(3  V 5.x you can configure equidistant lengths for PROFIBUS subnet
(constant bus cycle time) bus cycles. Details on equidistance are found in the 6WHS
 2QOLQH +HOS.
6WDUWXS RI WKH '3 PDVWHU V\VWHP
&38  '3   '3 LV WKH '3
Customize the start-up monitoring time for
DP slaves in parameter 0RQLWRULQJ WLPH
IRU SDUDPHWHU WUDQVIHU WR PRGXOHV.
That is, the DP slaves must start up within the set time and be configured by the CPU (as
DP master).
352),%86 DGGUHVV RI WKH '3 PDVWHU
With CPU 31x-2 DP, do not set  as PROFIBUS address.
9-26
PDVWHU
S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
&38  '3 LV '3 PDVWHU
Customize the start-up monitoring time for
DP slaves in parameters 0RQLWRULQJ WLPH
IRU SDUDPHWHU WUDQVIHU WR PRGXOHV and
0RGXOH UHSRUWV UHDG\.
A5E00203919-01