Setting The I/O Addresses - Siemens SINUMERIK 840Di sl Commissioning Manual

PROFIBUS DP Communication
8.5 DP slave I/O Module PP72/48
8.5.4

Setting the I/O addresses

When the dialog box is closed DP slave PP72/48 is inserted into the DP master system and
the detail view of DP slave PP72/48 is displayed in the station window. Select one of the
modules listed under DP slave PP72/48 (PP input/output module) from the hardware catalog
and insert it in slot 1 of the detail view.
The I/O addresses are assigned by "HW Config" automatically and should be changed
taking into account the following supplementary conditions:
● I/O address area of NC
● Selective access to inputs/outputs via the PLC
It is therefore recommended for the reasons given above, that the I/O addresses should be
assigned in the 0-255 range.
The dialog box offers the following configurations to choose from:
1. O/I 6/9 A222 E212121
2. O/I 6/9 A411 E212121
3. O/I 6/9 A42 E41
For DP slave PP72/48, select the 1st configuration and click OK to confirm the dialog box.
252
The 256-271 I/O addresses should not be assigned for compatibility reasons and for
future system extensions.
The PLC cannot access the individual I/Os directly for I/O address >256. The input/output
data must first be copied into internal flags of the PLC with the system functions SFC14
and 15.
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
Manual