Siemens SINAMICS S120 Function Manual page 638

Communication
11.1 Communication according to PROFIdrive
Properties of the Controller, Supervisor and drive units
Table 11- 2
Properties
As bus node
Send messages
Receive messages
Communication services
Four communication services are defined in the PROFIdrive profile:
● Cyclic data exchange via a cyclic data channel
Motion control systems require cyclically updated data in operation for open-loop and
closed-loop control tasks. This data must be sent to the drive units in the form of
setpoints or transmitted from the drive units in the form of actual values, via the
communications system. Transmission of this data is usually time-critical.
● Acyclic data exchange via an acyclic data channel
An acyclic parameter channel for exchanging parameters between the control/supervisor
and drive units is additionally available. Access to this data is not time-critical.
● Alarm channel
Alarms are output on an event-driven basis, and show the occurrence and expiry of error
states.
● Isochronous mode
Interface IF1 and IF2
The CU320-2 Control Unit can communicate via two different interfaces (IF1 and IF2).
Table 11- 3
PROFIdrive and SIEMENS
telegram
Isochronous mode
Drive object types
Can be used for
Cyclic operation
PROFIsafe
638
Properties of the Controller, Supervisor and drive units
Controller
Active
Permitted without external
request
Possible without any
restrictions
Properties of IF1 and IF2
IF1
Yes
Yes
All
PROFINET IO, PROFIBUS DP,
SINAMICS Link, PN Gate,
Ethernet/IP
Yes
Yes
Supervisor Drive unit
Passive
Only possible on request by the
Controller
Only receive and acknowledge
permitted
IF2
No
Yes
All
PROFINET IO, PROFIBUS DP,
CANopen, SINAMICS Link,
PN Gate, Ethernet/IP
Yes
Yes
Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
Drive functions