FC 64 - Digital Input List (Periodic Sample)

The digital input list (periodic sample) function code acquires data describing eight digital points in a single message. The source module and destination module must be located in the same process control unit. Input data consists of digital signals and qualities. Data transfer between the source and destination module is via the Controlway/module bus. The address and block number of the source module, and the update time are configurable parameters.

 

The HAC controller uses function code 64 to acquire the data values of eight digital points in a single peer-to-peer network message. Input data consists of analog signals and quantities. Data transfer between the source module and destination module is via the peer-to-peer network. The address block number of the source node and the sample time are configurable parameters.

 

Output data consists of boolean numbers corresponding to the digital data received and input point quality indicators. To insure that the signal is successfully transferred, the digital signal generates a point quality flag. To test the quality of the signal, include a function code 31 in the configuration. The quality of the point cannot be used as an input to any other type of block. The digital output value can be used as an input to any digital processing block.   Refer to Appendix H, for a definition of point quality.  

 

NOTE: A block defined as an analog input reads a value for any existing analog output from a function block configured

in the source node/module. No additional configuration in the source node/module is required.

 

 

 

Outputs

 

Blk

Type

Description

N

B

<S3>

N+1

B

<S4>

N+2

B

<S5>

N+3

B

<S6>

N+4

B

<S7>

N+5

B

<S8>

N+6

B

<S9>

N+7

B

<S10>

 

 

 

Specifications:

Spec

Tune

Default

Type

Range

Description

S1

N

1.0

R

Full

Sample period (in seconds)

S2

N

0

I

Note 1

Source node/module address

S3

N

Note 2

I

Note 3

Source block address (N)

S4

N

Note 2

I

Note 3

Source block address (N+1)

S5

N

Note 2

I

Note 3

Source block address (N+2)

S6

N

Note 2

I

Note 3

Source block address (N+3)

S7

N

Note 2

I

Note 3

Source block address (N+4)

S8

N

Note 2

I

Note 3

Source block address (N+5)

S9

N

Note 2

I

Note 3

Source block address (N+6)

S10

N

Note 2

I

Note 3

Source block address (N+7)

 

NOTES:

1. Range values are: 0-31 for the BRC-100, IMMFP11/12 and 1-250 for the HAC

2. Default values are:9,999 for the BRC-100, IMMFP11/12 and 2 for the HAC

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

 

64.1  Explanation

 

64.1.1  Specifications

 

S1 – MBUPD

(Sample period) Defines the update rate for the Controlway/module bus or peer-to-peer network message inputs. Sample period is specified in seconds. Specification S1 is tunable. The system allows tuning the value shown for the sample period, however, the original sample period will be retained. To change it the module must be placed in configure mode.

 

S2 – SMAD

(Source node/module address) In the BRC-100 controller, the address of the node/module containing the eight values desired. The address of the source module must be between zero and 31 inclusive.

In the HAC controller, S2 is the Cnet address of the HAC controller node that this function code is sampling data from via the peer-to-peer network. This node address must be between 1-250.

 

S3

Block address for output block N.

 

S4

Block address for output block N+1.

 

S5

Block address for output block N+2.

 

S6

Block address for output block N+3.

 

S7

Block address for output block N+4.

 

S8

Block address for output block N+5.

 

S9

Block address for output block N+6.

 

S10

Block address for output block N+7.