FC 175 - Sequence Executive (CSC01)

The sequence executive (CSC) function code selects the option of outputting the exception report to the CSC RS-232-C port. This function resides in fixed block address zero. It allows the operator to view the easy step configuration.

 

 

Outputs:

Blk

Type

Description

0

B

Logic 0

1

B

Logic 1

2

B

0 or 0.000

3

R

-100.0

4

R

-1.0

5

R

0.0

6

R

1.0

7

R

100.0

8

R

-9.2E18

9

R

9.2E18

10

B

Start-up in progress flag:

0 = no

1 = yes

11

R

Reserved

12

R

System free time (%)

13

R

Revision level

14

R

Reserved

 

 

 

Specifications:

Spec

Tune

Default

Type

Range

Description

S1

Y

0

B

0 or 1

Request to output exception report to RS-232-C port:

0 = no

1 = yes

S2

N

0

I

0, 1 or 3

Easy step status:

0 = no easy step configuration in unit

1 = easy step configured and restore option not selected

3 = easy step configured and restore option selected

S3

Y

0

I

Full

Easy step configuration number of steps

S4

N

0

I

Full

Easy step configuration number of inputs

S5

N

0

I

Full

Easy step configuration number of outputs

S6

Y

0.000

R

Full

Spare specification

S7

Y

0.000

R

Full

Spare specification

S8

Y

0

I

2046

Spare input specification

 

 

175.1   Explanation

 

The sequence executive (CSC) function code provides easy step configuration information (status, inputs, outputs, steps). The easy step status (S2) identifies to the device configuring the sequence command controller when an easy step configuration is present in the unit.

 

175.1.1  Specifications

 

S1

This input signals the CSC to output exception reports to the RS-232-C port. Function codes 30 and 45 generate exception reports. This feature enables when the input equals logic 1.

Specifications S7 and S8 of the segment control block (function code 82) determine the rate of exception report generation. The segment control block resides in fixed block 15.

 

S2

Status of easy step.

0 = no easy step configured

1 = easy step configured and restore option not selected

3 = easy step configured and restore option selected

NOTE: LIM and BIM devices have priority for exception reporting over easy step.

 

S3

This specification stores the maximum number of steps that the sequencer uses. The faceplate refers to this input while manually changing the step number.

 

Invoking easy step automatically sets S3 to the entered number

of steps.

 

NOTE: If easy step is not used to generate the configuration, but the

capability to change the step number from the faceplate is desired,

this specification should be set to the maximum number of steps used.

 

S4

Specification S4 stores the maximum number of digital inputs in the easy step configuration.

 

S5

Invoking easy step automatically sets S4 to the entered number of inputs.

 

S6 - S8

Spare

 

 

175.1.2  Outputs

 

10

Output block ten is the start-up in progress flag. The progress flag is logic 1 during the start-up period specified by S4 of function code 90 when the module is in execute mode.

 

After a successful start-up, this signal reverts to logic 0 and remains zero as long as the module is in execute mode.

0 = start-up compete

1 = start-up incomplete

 

11

Output 11 is reserved.

 

12

Output 12 is the system free time in percent. This is the percentage of free time left in the CSC.

 

(free time = 100 – total module utilization)100%

 

13

Output 13 is the revision level. This output is a four digit number representing the module nomenclature, hardware revision level and firmware revision level.

 

X Y Z Z

 

where:

X = Unit nomenclature (1 = CBC01).

Y = Hardware revision (0 = rev 0).

Z Z = Firmware revision (01 = rev A_1).

 

14

Reserved