FC 128 - Slave Default Definition

The slave default definition function code provides the default values for function blocks that interface with two digital I/O modules (e.g., BCD output, function code 115).

 

There are four types of digital I/O modules. The IMDSO15 module has eight outputs, and the IMDSO14 module has 16 outputs. The slave default definition function code provides the default values for up to 16 outputs per I/O module. The outputs are in two groups (group A and B) of eight per module. When defining the default values for IMDSO15 modules, place them in group A. Group B remains unused since these modules have eight outputs.

 

Outputs:

Blk

Type

Description

N

R

0.0  (no useful output)

 

 

Specifications:

Spec

Tune

Default

Type

Range

Description

S1

N

0

I

Note 1

Block number of first digital I/O

module function block

 

Used with:

 

function code 83

 

or

 

function code 115

S2

N

0

B

Full

Default state for output 1

S3

N

0

B

Full

Default state for output 2

S4

N

0

B

Full

Default state for output 3

S5

N

0

B

Full

Default state for output 4

S6

N

0

B

Full

Default state for output 5

S7

N

0

B

Full

Default state for output 6

S8

N

0

B

Full

Default state for output 7

S9

N

0

B

Full

Default state for output 8

S10

N

0

B

Full

Default state for output 9

 

 

Used with :

 

function code 115 only

S11

N

0

B

Full

Default state for output 10

S12

N

0

B

Full

Default state for output 11

S13

N

0

B

Full

Default state for output 12

S14

N

0

B

Full

Default state for output 13

S15

N

0

B

Full

Default state for output 14

S16

N

0

B

Full

Default state for output 15

S17

N

0

B

Full

Default state for output 16

S18

N

0

I

Note 1

Block number of second digital

I/O module function block

 

Used with:

 

function code 83

 

or

 

function code 115

S19

N

0

B

Full

Default state for output 1

S20

N

0

B

Full

Default state for output 2

S21

N

0

B

Full

Default state for output 3

S22

N

0

B

Full

Default state for output 4

S23

N

0

B

Full

Default state for output 5

S24

N

0

B

Full

Default state for output 6

S25

N

0

B

Full

Default state for output 7

S26

N

0

B

Full

Default state for output 8

S27

N

0

B

Full

Default state for output 9

 

 

Used with :

 

function code 115 only

S28

N

0

B

Full

Default state for output 10

S29

N

0

B

Full

Default state for output 11

S30

N

0

B

Full

Default state for output 12

S31

N

0

B

Full

Default state for output 13

S32

N

0

B

Full

Default state for output 14

S33

N

0

B

Full

Default state for output 15

S34

N

0

B

Full

Default state for output 16

 

NOTE:

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

 

128.1  Explanation

 

Function code 128 selects the default values for all outputs associated with any type of DSO module. If the control module goes bad, then the outputs can be forced to the default values until the module can be replaced or repaired.

 

The BCD output (function code 115) selects the failover to default settings for each group of eight outputs. Specification S2 of function code 115 defines the I/O module. If the hundreds digit of S2 equals logic 0, then the outputs go to the default values as configured by function code 128 on loss of the control module. Setting the hundreds digit to logic 1 holds the current output. Function code 128 provides default values for a maximum of two DSO modules. If one or both of the modules have eight outputs, then outputs one through eight are the default values, and outputs nine through 16 remain unused.