Specifications

Basic Concepts for Programming an S7-200 CPU

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S7-200 Programmable Controller System Manual

C79000-G7076-C233-01

Displaying the Status of the Program in Function Block Diagram

You can monitor the status of the FBD program by using STEP 7-Micro/WIN 32.

STEP 7-Micro/WIN 32 must be displaying FBD. FBD status displays the status of

all instruction operand values. All status is based upon the values of operands that

were read at the end of a PLC scan cycle. STEP 7-Micro/WIN 32 acquires the

values for the status display across multiple PLC scan cycles and then updates the

FBD status screen display. Consequently, the FBD status display does not reflect

the actual status of each FBD element at the time of execution.

To open the FBD status window, select the status icon from the toolbar

(Figure 4-18).

Tools Windows Help

Network 1

SIMATIC FBD

Name Var Type Data Type Comment

OB1

OFF

AND

OFF

Start

Stop

High Level

TEMP

BOOL

FBD Program status (end of scan)

Figure 4-18 Displaying the Status of a Program in Function Block Diagram