Lenze EtherCAT Controller-based Automation - Manual (Page 95)

Lenze · Controller-based Automation · EtherCAT® Communication Manual · DMS 6.4 EN · 04/2014 · TD17
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7 Commissioning of the system
7.3 Detailed description of the commissioning steps
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7.3.14 Processing EtherCAT I/O mapping
On the EtherCAT I/O image tab, you can enter variable names by double-clicking the variable fields
or pressing the space key:
By clicking the button, you can reference already existing variables (e.g. global variables from
function libraries) or you can enter variable names directly in the input field and thus create system
variables. The corresponding system variables for the PLC program are available.
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Note!
• If you insert more field devices in the control configuration or change the PDO
mapping, the object addresses change as well (%Qxx, %Ixx). Hence, the input and
output objects must be accessed via individual, unambiguous variables. The variable
names must comply with the IEC 61131 syntax (no space and leading digits in the
variable name).
• The manual assignment of object addresses in the "Address" column is not supported.
Hence, only use the automatically assigned addresses of the process image. A manual
assignment causes malfunctions.