FC 45 - Digital Exception Report

The digital exception report function code exception reports <S1>. Specification S2 defines the alarm state.  Exception reports are activated by a report enable signal from the module bus. The maximum number of exception reports allowed depends on the controller configuration. The number of exception reports is defined in the executive block of the controller.

 

Use function code 69 to test the alarm associated with the analog input/loop function block.

 

 

 

Outputs:

Blk

Type

Description

N

B

Value of exception report

 

 

Specifications:

Spec

Tune

Default

Type

Range

Description

S1

N

0

I

Note 1

Block address of input

S2

N

2

I

0 - 2

Alarm state:

0 = logic 0 alarm state

1 = logic 1 alarm state

2 = no alarm state defined

 

NOTES:

1. Maximum values are: 9,998 for the BRC-100, IMMFP11/12 and 31,998 for the HAC

 

 

45.1  Explanation

 

Exception Reports

 

An exception report returns to the module bus following a report poll message if a report enable message has been received for the block number. To import this data to another PCU, this  requires programming a digital input/loop block (function code 42) or digital input/Cnet (function code 122) in another node referencing the output of the function code 45 block. To import this data to a console the point must be added to the tag list.

 

An exception report occurs when:

 

 

 

45.2  Examples

 

Figure 45-1 illustrates an example configuration for a digital exception report function code.