Drive-Object Assignment For Profibus Connection - Siemens SINUMERIK 840D sl Commissioning Manual

13.9

Drive-object assignment for PROFIBUS connection

Introduction
PROFIBUS message frames (internal PROFIBUS, HW Config) are used to specify the
process data to be exchanged between the NCK and the drives. The sequence of the drive
objects (configurable/configured using HW Config) involved in PROFIBUS process-data
exchange is defined via a drive-object list.
List of drive objects
You usually configure eight drive objects (DOs). The drive objects have drive-object (DO)
numbers and are input in p978[0...9] as a list of drive objects.
You configure the following from parameter p978 in the index:
● 0...5 -> Motor Module (e.g., DO no. 3...8)
● 6 -> Control Unit (e.g., DO no. 1)
● 7 -> Active Line Module (e.g., DO no. 2),
The list of drive objects is already pre-assigned in the following order by the system upon
initializing the drive (acceptance of topology):
● ALM, first Motor Module ...n., CU; e.g., 2-3-4-5-1.
● The assignment allocated by the drive when the DRIVE-CLiQ topology is accepted must
Drive-object numbers
The drive-object numbers (DO numbers) can be viewed under "Commissioning > Machine
data > Control Unit MD/Infeed MD/Drive MD" in the component name line. For example, the
name for a Control Unit could be: "DP3.Slave3:CU_003 (1)". The DO number appears inside
the brackets "(...)".
IBN CNC: NCK, PLC, drive
Commissioning Manual, 07/2007, 6FC5397-2AP10-3BA0
PROFIBUS message frame 370 is not currently available for the Active Line Module
(infeed). However, according to the SINAMICS rule, all DOs from parameter p0101 have
to be assigned in parameter p0978. The resulting infeed DO number then has to be
entered in index 9 (see table below).
Note
The list of DOs involved in process-data exchange is completed by entering a value of
"0". Components that are available, but do not communicate on PROFIBUS, must be
preset to "255".
be reviewed and adapted.
13.9 Drive-object assignment for PROFIBUS connection
Tips
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