Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
After 840Di Rack has been inserted, the dialog box for configuring DP master
Use the Properties dialog box of DP master to make the following settings:
PROFIBUS address of DP master
The default setting of the PROFIBUS address is 2. It is recommended to
keep this setting.
Equidistant DP cycle
The SINUMERIK 840Di will accept the set equidistant DP cycle as the NC
system clock cycle and position controller cycle.
position controller cycle = NC system clock cycle = equidistant DP
The time that can be set for the equidistant DP cycle depends on:
1. The cyclic communication load by the drives and field devices on PROFI-
2. The capacity utilization of the cyclic position controller level of the NC by the
number of position-controlled machine axes and the active functions.
Dialog: Properties – PROFIBUS Interface DP Master
Dialog: Properties – New PROFIBUS Subnetwork
S7 subnetwork ID: <Subnetwork ID> (see below: Note)
Tab: Network settings
Data transfer rate: 12 Mbps
Enabling the equidistant bus cycle:
Equidistant DP cycle: <Isosynchronous time>
It is recommended to put down the S7 subnetwork ID, since it will be needed
later to parameterize the routing settings of the axis start-up tool SimoCom U.
See Subsection 9.1.6, page 9-269.
7 PROFIBUS DP Communication
7.3 SIMATIC S7 project