Diagnostics Readout; Data Validity Display - Siemens SIMATIC 6ES7158-3MU10-0XA0 Hardware Installation And Operating Manual

Bus couplers pn/mf coupler

Table of Contents

PROFINET IO

5.3 PROFINET IO interrupts, diagnostics, error messages and system events

5.3.2.3

Diagnostics readout

Options for reading out the diagnostic data

You can evaluate vendor-specific diagnostics using the corresponding data records (e.g.

0x800B) or using diagnostics interrupts.

Table 5- 12

Reading out the diagnostic data with STEP 7.

Automation system

with

IO controller

SIMATIC S7

Diagnostics as plain text in STEP 7 in online and

diagnostics view

Instruction "RDREC" (SFB 52)

Reading data records from the IO device

Instruction "RALRM" (SFB 54)

Receiving alarms from the IO device

Data status byte

Based on the data status byte (DS) value in the last byte, the user can recognize the following

scenarios. Below you can find a description of the structure of the DS byte:

• 0x40: There is no valid coupling partner of the module input data in the other subnet.

• 0x60: The IO controller in the other subnet is in STOP state.

• 0x80 Valid user data received from coupling partner

Structure of the diagnostic data records

You can find the structure of the diagnostic data records and programming examples in the

Programming Manual (https://support.industry.siemens.com/cs/ww/en/view/19289930) in

sections Structure of the diagnostic data records and Examples for the diagnostic data

records.

The data records supported by the PN/MF Coupler are based on the PROFINET IO standard -

Application Layer Service Definition V2.0.

You can download the standard from the Internet free of charge (PROFIBUS

(https://www.profibus.com/)).

5.3.2.4

Using the DIA parameter (data validity display), you query information about the validity of

the input data supplied from the other bus side of the PN/MF Coupler directly in the user

program.