Configuring The Clock System; Overview Of Isochronous Mode - Siemens SIMATIC S7-1500 System Manual

7.11

Configuring the clock system

7.11.1

Overview of isochronous mode

Introduction
The SIMATIC Drive Controller supports isochronous mode for the following clock systems:
● PROFINET IO interface X150
● PROFIBUS DP interface X126
● Technology I/Os X142
● SINAMICS Integrated with PROFIdrive Integrated (always isochronous)
You can operate the clock systems separately or coupled on an isochronous basis.
Exception: Isochronous coupling of the PROFIBUS DP interface is not possible.
Independent isochronous mode
If you want to operate the clock systems separately in isochronous mode, configure a cycle
time for each clock system and assign the clock systems to different process images, for
example:
● SINAMICS Integrated → PIP OB Servo [OB 91]
● PROFIBUS DP interface X126 → PIP 1 of isochronous mode interrupt OB [OB 6x]
The clock systems are in this case not isochronous to each other.
Note
You cannot operate the X142 technology I/Os in isochronous mode separately from
SINAMICS Integrated.
If you want to operate technology I/Os X142 and SINAMICS Integrated in isochronous mode
simultaneously, always set coupled isochronous mode.
SIMATIC Drive Controller
System Manual, 11/2019, A5E46600094-AA
Configuring
7.11 Configuring the clock system
137