Lenze C520 - Mandatory SlavesOptional Slaves

8.1.11.2 Mandatory slaves/Oponal slaves
The concept of the modular machine conguraon is based on the fact that, depending on
the selected conguraon within a project, certain EtherCAT slaves have to exist physically at
the bus (Mandatory Slaves) or do not have to exist (Oponal Slaves). The problem is the clear
idencaon of idencally constructed devices with the EtherCAT standard mechanisms. For
this purpose, the Second Staon Address (alias address) described the ETG is used which is
saved in the EEPROM of the EtherCAT slave.
All EtherCAT slaves must be dened in the PLC applicaon. The order of the denion
determines the EtherCAT address by assigning the addresses connuously from ’1001’. The
address is the biunique idenfying feature of a device in the network.
If, for instance, a slave shall contain the applicaon A or the applicaon B, a device has to be
created in the project for each applicaon. This way, the applicaons are idened by the
dierent EtherCAT addresses. The same applies to the process data mapping, terminal
conguraon etc.
Conguraons serve to indicate whether an EtherCAT slave is mandatory or oponal. The
conguraons are summarized in the "mmc-0-conf.csv" le on the Lenze Controller. More
idenfying features of the slaves are included in the "mmc-0-ident.csv" text le.
4Conguraon les ^ 66
If the device is a Mandatory Slave or an Oponal Slave and whether the slave is available at
the EtherCAT bus, is displayed via the properes "IsMandatory" and "IsPresent" of the
ETCSlave funcon block.
Idener/data type Meaning/possible sengs
IsMandatory (GET) Depending on the currently selected modular machine conguraon, the feature is set or not set for the
EtherCAT slave. If the modular machine conguraon is not used, the value ’TRUE’ is automacally returned.
•
TRUE: Slave is mandatory
•
FALSE: Slave is oponal
IsPresent (GET)
•
TRUE: The slave is currently available at the bus.
•
FALSE: The slave is currently not available at the bus.
Example
// Mandatory:
xMandatory_94: = c550_HL_SM.IsMandatory;
xMandatory_c550_S: = L_c550_SM.IsMandatory;
xMandatory_c550_D: = L_c550_SM_1.IsMandatory;
// Mandatory:
xMandatory_94: = c550_HL_SM.IsPresent;
xMandatory_c550_S: = L_c550_SM.IsPresent;
xMandatory_c550_D: = L_c550_SM_1.IsPresent;
Conguring the network
EtherCAT
Modular machine conguraon
65