How to find causes

At a Glance

Cause finding involves searching for an element which has triggered an alarm on a diagnostics EFB or DFB input.

Each input with the Diag property can be used to search for causes.

How to find causes

The following table describes the procedure for finding causes.

Step	Action
1	Select the alarm in question in the Viewer. Result: The alarm line is shown in reverse video.
2	Right-click on the input for which you want to search for the cause. Result: The contextual menu allows you to initialize an animation table and to search for the DFB input variable so as to ascertain whether it is used in the program. This is called cause finding.
3	Click on the Initialize Search to search for cross-references to the selected input. Result: The Cross-References screen is displayed.

Step

Action

1

Select the alarm in question in the Viewer.

Result: The alarm line is shown in reverse video.

2

Right-click on the input for which you want to search for the cause.

Result: The contextual menu allows you to initialize an animation table and to search for the DFB input variable so as to ascertain whether it is used in the program. This is called cause finding.

3

Click on the Initialize Search to search for cross-references to the selected input.

Result: The Cross-References screen is displayed.

Lists of diagnostics inputs of diagnostics EFBs or DFBs

The table below specifies the diagnostics inputs (with Diag property selected) of diagnostics EFBs or DFBs in the diagnostics library.

Block name	Block type	Name of diagnostics inputs
`ALRM_DIA`	DFB	COND1 COND0
`D_ACT`	EFB	UNLOCK REACT
`D_DYN`	EFB	UNLOCK REACT
`D_GRP`	EFB	IN
`D_LOCK`	EFB	UNLOCK
`D_PRE`	EFB	IN
`D_REA`	EFB	REACT
`EV_DIA`	DFB	EVENT COND
`MV_DIA`	DFB	EVENT COND
`NEPO_DIA`	DFB	REQ_I REQ_O SENSOR_I SENSOR_O SECU_I SECU_O SECUPERM
`TEPO_DIA`	DFB	REQ_I REQ_O SENSOR_I SENSOR_O SECU_I SECU_O SECUPERM
`SAFETY_MONITOR`	DFB	-
`USER_DIAG_ST_MODEL`	DFB	COND