Configuring Addresses for Sercos Communication
The address for Sercos communication is used for transmission of the data in the Sercos data field of Sercos telegrams such as MDTs, ATs, and SVC data. Two types of addressing are available:
oVia the Topology address (default)
oVia the Sercos address
The addressing type Topology uses the physical position of the slave on the Sercos bus. For example, the first slave on the line has the address 1. When you add slaves to the Sercos master, EcoStruxure Machine Expert Logic Builder assigns consecutive topology numbers in the order in which the slaves are added.
The addressing type Sercos uses the numerical address manually assigned to a device, for example, with a selector on the device.
The type of addressing is selected with parameter IdentificationMode. You can use different types of addressing on the same Sercos bus.
During phase-up, the master verifies correct addressing of the slaves. If an address on the bus is not unique, phasing-up is not completed.
Configuration of the Address for Sercos Communication
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Step |
Action |
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1 |
Display the Device tree by clicking View > Navigators > Device tree. |
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2 |
In the tree of the Modicon M262 Motion Controller below the node SercosMaster (Sercos Master), double-click the Sercos slave to be configured. |
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3 |
Display the tab Parameters tab of the slave. |
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4 |
Expand the parameter group Identification by clicking the corresponding plus sign. |
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5 |
For addressing type Topology mode (default setting): oUse the default setting of the parameter IdentificationMode (Topology mode). oSet the parameter ConfiguredTopologyAddress to the value corresponding to the physical position of the slave on the Sercos bus. For example, set the parameter to 1 for the first slave connected to the master. For addressing type Sercos mode: oSet the parameter IdentificationMode to Sercos mode. oSet the value of the parameter ConfiguredSercosAddress to the address value of the slave (for example, the value set with a selector on the device). |
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6 |
During Sercos phase-up, the system matches a scanned device with the configured device according to the selected addressing type: oFor Topology mode, the scanned device with TopologyAddress is mapped to a configured device with the same ConfiguredTopologyAddress. oFor Sercos mode, the scanned device with SercosAddress is mapped to a configured device with the same ConfiguredSercosAddress. The parameters ConfiguredTopologyAddress and ConfiguredSercosAddress contain the value selected in the previous step and the parameters TopologyAddress and SercosAddress contain the values read from the scanned device. |
Refer to the chapter Parameters of the Slaves - Group Identification for additional information on the parameters.
