Siemens SINAMICS S120 Function Manual page 716

Communication
11.3 Communication via PROFINET IO
Clock generation via PROFINET IO (isochronous communication)
SINAMICS S120 with CU310-2 PN/CU320-2 DP/CU320-2 PN can only assume the role of a
synchronization slave within a PROFINET IO network.
For a CU310-2 PN/CU320-2 DP/CU320-2 PN with CBE20 module, the following applies:
● Transmission type IRT, IO device is synchronization slave and isochronous, send cycle is
applied to bus: Control Unit synchronizes with the bus and the send cycle becomes the
cycle for the Control Unit.
● RT or IRT (option drive unit "not isochronous") has been configured. SINAMICS uses the
local cycle configured in SINAMICS.
The following applies to a CU320-2 DP/CU320-2 PN for which a CBE20 is configured, but
does not exist:
● SINAMICS uses the local clock (clock configured in SINAMICS); if there is no data
exchange via PROFINET, alarm A01487 is output ("Topology: Comparison option slot
components missing in the actual topology").
Access via PROFINET is not available.
Telegrams
PROFIdrive telegrams are available for implementing cyclic communication via PROFINET
IO (see Section "Communication according to PROFIdrive", Cyclic communication
(Page 641)).
DCP flashing
This function is used to check the correct assignment to a module and its interfaces. This
function is supported by a CU310-2 PN and a CU320-2 DP/PN with inserted CBE20. The
function can also be used without CBE20 in a CU320-2 PN.
1. In HW Config or the STEP 7 Manager, select the menu item "Target system" > Ethernet >
Edit Ethernet node".
The "Edit Ethernet Node" dialog box opens.
2. Click the "Browse" button.
The "Browse Network" dialog box opens and displays the connected nodes.
3. Select the CU310-2 PN or the CU320-2-DP with inserted CBE20 as node.
The "DCP flashing" function is then activated via the "Flash" button.
The DCP flashing will be effective on the RDY LED (READY LED 2 Hz, green/orange or
red/orange) on the CU310-2 PN/CU320-2 DP.
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 STEP 7 V5.3 SP1 via Ethernet
or via STARTER.
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Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
Drive functions