Configuring The Profibus Interface As Isochronous; Setting The Clock System - Siemens SIMATIC S7-1500 System Manual

Configuring
7.11 Configuring the clock system

Setting the clock system

You have configured an external drive as isochronous on PROFINET using the example of
the SINAMICS S120 CU320-2 PN. Next, set the clock system.
● Choose between independent and coupled isochronous mode.
● Set the required send clock.
● Assign the "MC Servo" OB the clock system of the PROFINET interface X150.
You can find more information in Setting the clock system (Page 150).
7.11.5

Configuring the PROFIBUS interface as isochronous

You can find out how to configure isochronous mode for distributed I/O on the PROFIBUS
DP in the Isochronous Mode
(https://support.industry.siemens.com/cs/ww/en/view/109755401) function manual.
Note
Isochronous coupling of the PROFIBUS interface with other clock systems is not possible.
If you want to expand the drive configuration limits with distributed drive systems, connect
those distributed drive systems over the PROFINET IO interface X150. Only the PROFINET
IO interface X150 can be connected isochronously alongside the MC Servo to the clock
system of SINAMICS Integrated and the X142 technology I/Os.
7.11.6 Setting the clock system
The SIMATIC Drive Controller supports isochronous mode for the following clock systems:
● PROFINET IO interface X150
● PROFIBUS DP interface X126
● Technology I/Os X142
● With PROFIdrive Integrated
You can operate the clock systems separately or coupled on an isochronous basis.
Exception: Isochronous coupling of the PROFIBUS DP interface is not possible. You can find
information on the combinations in which you can couple the clock systems in Overview of
isochronous mode (Page 137).
You make the required settings in the relevant clock systems.
Once you have set and, if necessary, coupled the clock systems, you need to couple the OB
servo with the clock system in which you wish to operate the drives / that is the leading clock
system.
150
SIMATIC Drive Controller
System Manual, 11/2019, A5E46600094-AA