Chapter 4. Configuration
GFK-3030
December 2017
23
4.3
PROFINET Cyclic I/O Data
Cyclic I/O Data is that data obtained by the PROFINET Controller from each PROFINET IO-Device in a cyclic
manner. The default transfer frequency of PROFINET cyclic data is 128ms. The GSDML file supports three
possible values: 128ms, 256ms and 512ms.
PME is used to assign base references to the Cyclic I/O Data of each GLM IO-Device. Each slot of the GLM
IO-Device has a
Settings
form, such as that shown in Figure 27. Double-click on the slot to bring up the
corresponding form.
•
If the Slot has Output values (as defined by the Direction column in the following tables), it will require
a base reference in %Q. The lowest order bit in the Output table will correspond to the selected %Q
reference value, which must be a multiple of 8, plus 1.
•
If the Slot has Input values (as defined by the Direction column in the following tables), it will require a
base reference in %I. The lowest order bit in the Input table will correspond to the selected %I
reference value, which must be a multiple of 8, plus 1.
In the case of slot 3, where there are matching input and output settings, GE recommends selecting the same
%I and %Q references, as this will avoid confusion when debugging and in project documentation. For
instance, if %I00129 is used for the Port Alarm Inputs, then use %Q00129 for the Port Alarm Outputs. Also note
that 16 contiguous %I and %Q references are required to accommodate all the Port Alarm flags (in both %I
and in %Q). Finally, do not allow any other devices or device slots to overlap the selected %I and %Q settings.
If PME is allowed to automatically assign the next available %I and %Q references, there will likely be no
alignment between the %I and %Q bits assigned to any given GLM IO-Device. This will work fine, but may
cause confusion when debugging.
Figure 27: Assign Starting %I & %Q References for Cyclic I/O Data
The constituent data content is documented in the following sections:
•
Slot 1 (of the GLM Switch Device) contains Device Status.
•
Slot 2 contains Port Status.
•
Slot 3 contains Port Alarm Settings & Status.
•
Slot 4 contains MRP Group 1 Status.
•
Slot 5 contains MRP Group 2 Status.
•
Slot 6 contains Ring Group 1 Status
•
Slot 7 contains MRE Group 1 Status
•
Slot 8 contains MRE Group 2 Status
The Status Flags are discussed in Chapter 5,
