5 simatic step7 blocks, Hex parameterizing, Simatic step7 blocks – EUCHNER AS-i 3.0 PROFIBUS Gateway with integrated Safety Monitor for 2 AS-i circuits User Manual

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162

Subject to reasonable modifications due to technical advances

Id.-No.: 103329

Issue date - 24.10.2008

EUCHNER GmbH + Co. KG

Kohlhammerstraße 16 • D-70771 Leinfelden-Echterdingen

Tel. +49/711/75 97-0 • Fax. +49/711/753316

AS-i 3.0 PROFIBUS Gateway with integrated Safety Monitor

Appendix: Example for startup on a Siemens S7

17.2.4.3

Hex parameterizing

DPV1_Status

Hexadecimal representation of the data resulting from the settings for parameter
bytes 0 to 2.

User_Prm_Data

Hexadecimal representation of the data resulting from the settings for parameter
bytes 3 to 37.

17.2.5

SIMATIC Step7 blocks

After the hardware has been configured, these can be sent to the CPU. Since
data transmission of the AS-i data is done in this example directly to the process
image, no additional Step7 program is needed for data refreshing. Therefore
there is no program code in OB1.

OB1:

Cyclical program block. Access to the AS-i data is via the parameterized

address space in the in-/outputs process image.

OB82:

PROFIBUS diagnostic alarm. This OB is invoked as soon as a PROFI-

BUS slave has set the ExtDiag flag in the telegram reply. This ExtDiag flag allows
a PROFIBUS slave to report an error condition to a PROFIBUS master. If OB82 is
not present, the CPU is stopped when a PROFIBUS slave sets the ExtDiag flag.

OB86:

PROFIBUS peripheral error. This OB is invoked when the PROFIBUS

master detects a PROFIBUS slave failure.

OB100:

Startup OB. This OB is run once when the CPU starts up.

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