I face a strange problem with DI801 (CI801->CI854).
The Communication of CI854, CI801 & DI801 is healthy.
But When i go inside DI801 all channels are showing RedTriangle & there is no communication. But if 24V is Provided to 16th Channel of DI, all other channels become healthy and starts working as expected.
Has any one faced this issue? What can be the reasons? Can this be a Problem with module itself?
See this manual on page 599:
Each hardware unit DI810 has a UnitStatus channel that describes the current error status of the unit. Both dynamic and static warnings and errors are collected in this
channel. The data type, for the variable connected to the UnitStatus channel of the hardware unit, can be either of dint data type or of HwStatus data type. If a variable of dint data type is connected to the UnitStatus channel, the possible unit status values are: 0 (OK), 1 (Error), or 2 (Warning).
The HwStatus data type contains the same information as shown under the
Unit Status tab of the hardware configuration editor, that is, unit status information
and status message acknowledgement functions. These components will be
available by using the HwStatus data type as a variable connection to the UnitStatus
If you upgrade your controller to new firmware version make sure to also you upgrade CI854.