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Siemens Building Technologies CM2N8887en / 26.02.01

Landis & Staefa Division 1/4

VISONIK

COLBAS

Function sheet

COLBAS is the Landis & Staefa programming language for the VISONIK BPS. The

abbreviation COLBAS stands for:

Control Oriented Language for Building Automation Systems.

COLBAS is based on the programming language BASIC, but contains additional,

special functions for solving measuring and control tasks.

COLBAS is implemented in the Building Process Station (BPS) and in the Data and

Communication Server (DCS). However, in the DCS, COLBAS is only used for special

requirements and interfaces to other systems and is thus not covered in the following.

DCS

BPS

Start Stop

T T

8887Z01en

Programming

Operation

The BPS is designed to control and monitor a wide variety of building services systems

both simultaneously and in real time. Its functionality is often expanded through

requirements such as: Optimized plant operation, reporting, fault handling and alarm

reporting, data acquisition, etc.

All the tasks given above are defined and implemented using COLBAS programs.

COLBAS has the following additional functions compared to BASIC:

– Access to process values either manually or from the program (immediate mode or

deferred mode).

– Parallel processing of programs (multitasking) either independently or synchronized

mutually.

– Real-time behavior, i.e. programs react immediately to external events and can run

synchronously to real time.

COLBAS programs are written with the support of PC software containing program

libraries for the most common applications. Special requirements can be solved with

individual COLBAS programs.

Use

Implementation

Tasks

Implementation

Summary of content (4 pages)

PAGE 1
8 887 VISONIK® COLBAS Function sheet COLBAS is the Landis & Staefa programming language for the VISONIK BPS. The abbreviation COLBAS stands for: Control Oriented Language for Building Automation Systems. COLBAS is based on the programming language BASIC, but contains additional, special functions for solving measuring and control tasks. Use COLBAS is implemented in the Building Process Station (BPS) and in the Data and Communication Server (DCS).
PAGE 2
Program structure Process and instrumentation diagram The following diagram shows a simplified program structure in the BPS. TSK 255 TSK 203 TSK n (200 .. 255) TSK n (1 .. 199) Header ....................................... PROC X 10 ......................................... 20 ......................................... .. ......................................... .. ......................................... ... ......................................... 10 ...................... 20 ...................
PAGE 3
Instructions Instruction structure A COLBAS instruction usually begins with a keyword followed by a supplementary element. The keyword tells which actions should be carried out; the supplementary element gives additional information. Example: RUN 3 (Start task 3). RUN = Keyword. Available instructions 3 = Supplementary element, here the task number.
PAGE 4
Process access I/O point addresses and parameters An important requirement to control building services systems is that the process variables and/or I/O points can be accessed either by the operator or via the program. In COLBAS this data is accessed via addresses and parameters. 8887Z03en BPS $d011 ML $031 Example SB $052 SB $053 Parameters Addresses This example illustrates how the I/O points shown above are accessed by the program: .... 3000 4000 Mz:=$031.