ABB AI845 Configuration Module Parameters Tab

ABB AI845 Configuration Module Parameters Tab

Mark the External power supervision check box if supervision of the power

supply to the transducer shall be enabled. If an error occurs the status of the unit is

updated and the channel status bits will be set.

In the Shunt mode drop-down menu you can choose between ‘Internal shunt’ or

‘External shunt’. External shunt shall always be set together with MTU TU844 or

TU845. and at voltage signal together with other MTUs.

Channel parameters tab

The Channel parameters tab shows the user parameters of the module. It shows

Filter time, Linearization function and Signal range.

Channel area

Mark the Deactivate check box if the channel shall not be used.

Make the required choices in the Filter time, Signal range and Linearization

drop-down menus.

The service control is used for reading acyclic data and is only visible if the module

is configured via a CI840. The service control is only applicable for AI845.

Redundancy Tab

The Redundancy Tab is only shown in Commissioning mode.

Module status area

In the Module status area you can see which I/O module that is treated as primary

by CI840. By clicking the Update button you update the status for which of the I/O

module that are the primary.

The HART Primary unit does not have to be identical with the Primary unit

described in this control. The HART Primary unit is set in the Service Control in

Engineering mode.

Figure 32. AI845 - Service - HART Primary Tab

The HART Primary Tab is only shown in Engineering mode. Here you select

through which unit HART communication should happen.

The HART Primary unit can be, but does not have to be, identical with the unit

treated as primary by CI840 seen in Service Control in Commissioning mode. If the

HART Primary module fails, HART communication does not switch over

automatically to the other unit. The user must manually do the switchover.