Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
The I/O address set by the SlaveOM for an axis must match the I/O address
set in the NC.
No automatic adjustment takes place!
The following data must be identical.
1. SIMATIC S7 configuration of DP slave 611U
2. SINUMERIK 840Di-NC
MD13060 DRIVE_LOGIC_ADDRESS[n], (logical drive address).
To avoid any modifications to the I/O addresses in NC machine data:
MD 13050 DRIVE_LOGIC_ADDRESS[n].
it is recommended to use the default values of the machine data when config-
uring the I/O addresses within the configuration:
1. Axis: Default I/O address = 272
mth Axis: Default I/O address = 272 + (m-1)*20
The default setting for the machine data is described in Subsection 10.5.1,
Dialog: DP Slave Properties
Table entry: PROFIBUS partner, I/O addr.: <I/O address>
After you have confirmed this dialog using the button: "OK", the dialog:
"DP slave properties" closed. Step 1 of parameterization of DP slave 611U is
The default setting with regard to the consistency of the I/O data is whole
This setting results in:
Direct accesses from the PLC user program (e.g. byte, word or double word)
to this address range are not admitted by the PLC operating system.
Accesses to this address range must be carried out using the system func-
tions SFC 14 and SFC 15.
The system functions SFC 14 and SFC 15 guarantee consistent reading/
writing of the data of an axis, e.g.:
– Message frame type 102: 6 words for the set value or 10 words for the
7 PROFIBUS DP Communication
7.3 SIMATIC S7 project