Communication
9.4 Communication via PROFINET IO
Function Manual
Function Manual, 01/2011, 6SL3097-4AB10-0BP3
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Clock generation via PROFINET IO (isochronous communication)
The SINAMICS S110 with CU305 PN can only assume the role of a synchronization slave
within a PROFINET IO network.
The following applies for a CU305 PN:
● Transmission type IRT, IO device is synchronization slave and isochronous, send clock
cycle is applied to bus: Control Unit synchronizes with the bus and the send clock cycle
becomes the cycle for the Control Unit.
● RT or IRT (option drive unit "not isochronous") has been configured. The SINAMICS does
not use a local clock (clock configured in SINAMICS).
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 by SINAMICS S110 with CU305 PN.
1. In HW Config or STEP7 Manager, select the menu item "Target system" > "Ethernet" >
"Edit Ethernet node".
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 S110 with CU305 PN has been selected as a node, activate the
"DCP flashing" function by means of the "Flash" button.
The "DCP flashing" function is activated on the RDY (READY LED 2 Hz, green/orange or
red/orange) LED display on the CU305PN.
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.
STEP 7 Routing
The CU305 does not support STEP 7 routing between PROFIBUS and PROFINET IO.
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