PROFIBUS DP Communication
8.1 General information
Manual
230 Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
– DP master, class 2 (DPMC2):
These are devices for configuration, commissioning, and operator control and
monitoring while the bus is in operation.
Examples: Programming units, operator control and visualization devices
2. Slaves (passive bus nodes)
These devices may only receive, acknowledge and transfer messages to a master when
so requested.
Examples: Drives, I/O modules
Motion Control Option
Communication between SINUMERIK 840Di sl (NC and PLC), as the master, and the slave
components on PROFIBUS is based on PROFIBUS DP with the Motion Control Extension.
The MotionControl extension is characterized by:
● Configurable isochronous DP cycle
● Cyclic synchronization of the DP slaves using GlobalControl message frames from the
DP master
● Automatic maintenance of the internal clock by the DP slaves during a short
communication failure between the DP master and DP slave
References:
/PPA/ PROFIDrive Profile Drive Technology Version 3, Draft V1.4.2, 1. September 2000
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