FC 28 - Analog Output (Same PCU Node)

The analog output function code transfers signals to an IMAOM01 Analog Output Module. The source module must be located in the same PCU node as the analog output module.  The module transmits the specified analog signal at the Controlway/module bus update rate that is specified in the executive block or in the segment control block of the source module.

 

To insure that the signal is successfully acquired from the module bus, the analog signal generates a point quality flag.  To test the quality of the signal, include a function code 31 (test quality) block in the configuration. The quality of the signal cannot be determined by any other type of block. However, the output of the test quality block can be used as an input to other digital processing blocks to provide signal quality information.

 

The input value becomes a percentage using the following equation:

 

Outputs:

Blk

Type

Description

N

R

Value to be transmitted over the module bus with quality

 

 

Specifications:

Spec

Tune

Default

Type

Range

Description

S1

N

0

I

0 - 31

Destination module address

S2

N

0

I

1 - 8

Destination block address or channel number

S3

N

5

I

Note 1

Block address of input

S4

N

0.000

R

Full

Input Zero in engineering units

S5

N

100.000

R

Full

Input Span in engineering units

 

NOTE:

1. Maximum values are:   254 for COM modules and CLC01/02/03/04

1023 for SLC01/21

2046 for NMFC01/02, IMMFC05, CBC01 and CSC01

9998 for IMMFC03/04 and IMMFP01/02/03

 

28.1  Explanation

 

Figure 28-1 illustrates the use of a function code 31 block to test point quality.