Siemens SINAMICS S120 Function Manual page 523

For an example of how to link a SINAMICS S120 to a SIMATIC S7 via PROFINET IO,
please refer to the FAQ "PROFINET IO communication between an S7-CPU and SINAMICS
S120" on the Internet.
For a description of the CBE20 and how you can use it in the drive, please refer to
document: /GH1/ SINAMICS S120 Equipment Manual Control Units
The PROFINET interface on the CU310 unit is described in document: /GH6/ SINAMICS
S120 Equipment Manual AC Drives.
Clock generation via PROFINET IO (isochronous communication)
The SINAMICS S120 with CU310/CU320 can only assume the role of a synchronization
slave within a PROFINET IO network.
The following applies to a CU310 / CU320 with CBE20 module:
● Transmission type IRT, IO device is synchronization slave and isochronous, send clock
● RT or IRT (option drive unit "not isochronous") has been configured. The SINAMICS does
The following applies to a CU320 for which a CBE20 is configured, but does not exist:
● SINAMICS uses local clock (clock configured in SINAMICS), no data exchange via
Telegrams
PROFIdrive telegrams are available for implementing cyclic communication via PROFINET
IO (see section "Communication according to PROFIdrive", cyclic communication).
DCP flashing
This function is used to check the correct assignment to a module and its interfaces. This
function is supported in FW 2.4 and higher by SINAMICS S120 with CU310 / SINAMICS
S120 with CU320 and plugged CBE20.
1. In HW Config or STEP7 Manager, select the menu item "Target system" > "Ethernet" >
2. The "Edit Ethernet node" dialog box opens.
3. Click on the "Browse" button.
4. The "Browse Network" dialog box opens and displays the connected nodes.
5. After the SINAMICS S120 with CU310 or SINAMICS S120 with CU320 with plugged
The DCP flashing will be effective on the RDY LED (READY LED 2Hz, green/orange or
red/orange) on the CU310/CU320.
The LED will continue to flash as long as the dialog is open. When the dialog is closed, the
LED will go out automatically. The function is available as of STEP7 V5.3 SP1 via Ethernet.
Drive functions
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
cycle is applied to bus: Control Unit synchronizes with the bus and the send clock cycle
becomes the cycle for the Control Unit.
not use a local clock (clock configured in SINAMICS).
PROFINET, alarm A1487 "Topology fault" is issued.
Access via PROFINET is not available.
"Edit Ethernet node".
CBE20 has been selected as a node, activate the "DCP flashing" function by means of
the "Flash" button.
Communication PROFIBUS DP/PROFINET IO
10.3 Communication via PROFINET IO
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