7.7 HART-Enabled mA Inputs and Outputs
All channels on the YUAA are HART capable when assigned to mA input or output. Therefore, there can be up to 16
individual HART channels, with the data delivery to the controller over IONet split into two groups of 8 points (data for
IOPoints 1-8 is grouped together, and data for IOPoints 9-16 is grouped together).
From the ToolboxST Component Editor, there is no separate configuration tab for HART. Assigning channels to HART uses
the same mA input or mA output configuration, where within the mA input or output tab there are additional settings for
HART_Enable, HART_CtrlVars, HART_ExStatus, HART_MfgID, HART_DevType, and HART_DEVID.
In order to conserve the dataflow for the YUAA, there are three stages of deployment based on HART assignments:
• No channels are assigned to HART with no HART transfers used on IONET for maximum available number of channels
per controller
• 1 up to 8 channels assigned to HART within a single group of 8 channels (1 to 8) or (9 to 16), requiring a pack reboot
when first assigned to allocate data transfers for a single HART group of channels
• Channels assigned across both HART groups, requiring a second pack reboot upon the first channel assigned to the
second group to allocate a second set of data transfers for both HART groups of channels.
The reboots for HART traffic are only required when first assigning a channel within a group as part of a download to the
YUAA. Once the first channel is assigned in a group, additional channels may be assigned on following downloads without a
reboot of the pack. If channels being assigned in a download are within both groups of HART channels, then only a single
reboot is required.
190 GEH-6855_Vol_II GEH-6855_Vol_II Mark VIeS Functional Safety Systems Volume II
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