Display of Analog Module Faults

At a Glance

Analog modules have LEDs which show the module’s status and the status of the channels. There are:

Illustration

The following diagram shows the analog modules display screen:

Description

Three LEDs situated on each module indicate, according to their status (indicator on, flashing or off), the operating status of the module:

The green RUN indicator: indicates the operating status of the module
The red ERR indicator: indicates an internal fault in the module or a fault between the module and the remainder of the configuration.
The red I/O indicator: indicates an external fault.

NOTE: The CH• status LEDs are not used on analog modules.

The various possible faults are listed together in the following table:

Indicator	On	Flashing	Off
RUN (green)	Operating normally	-	Module is faulty or off
ERR (red)	Internal fault, module unserviceable	Communication fault	No internal fault
I/O (red)	External faults: Overload or underload fault during calibration Range under/overflow fault.	Terminal block fault	No external fault
CH•	No channel status LED