User guide

• When a return of submodule alarm occurs, a counter in DB 10 is incremented in the associated alarm

(OB83). This counter indicates the number of return of submodule alarms that have occurred. Because

no additional data are provided by the IO device for this alarm, SFC54 is not called in this case.

• Cyclic OB1 is empty. Access to the I/O data of the devices takes place directly by the download or

transfer commands to the process image and is not discussed further here.

The example program contains the following blocks:

Block Function Comment

OB11 Cyclic OB A counter in DB10 is incremented cyclically, according to a

clock memory

OB40 Process alarm For each process alarm, increments a counter in

10.Cnt_ProcAlarm and stores the alarm data of the device in

DB140.

OB82 Diagnostic alarm For each diagnostic alarm, increments a counter in

10.Cnt_DiagAlarm and stores the alarm data of the device in

DB182.

OB83 Return of submodule alarm For each return of submodule alarm, increments a counter in

continuous counter in DB 10.RetOfSubAlarm.

OB86 Loss of rack fault

DB10 Counter for alarms Contains alarm counters for various alarms that are

incremented in the relevant alarm OBs.

DB140 Additional alarm information for

process alarm

Contains the alarm data of the IO device for a process alarm

DB40 Data block for OB40

DB82 Data block for OB82

DB182 Additional alarm information for

diagnostic alarm

Contains the alarm data of the IO device for a diagnostic

alarm

VAT_1 Variable table Displays the IO data areas used (inputs and outputs in the

process image) and the alarm counters in DB10

Table 1: Overview of PNIO Controller Blocks for Example Project

2.5.4 Downloading the STEP 7 Program and the PROFINET IO Bus Configuration

In Simatic Manager, the bus configuration can be downloaded to the CPU along with the STEP 7 program. To do

so, select the block in Simatic Manager and activate the following:

o Via the "PLC Æ Download" menu command, activate the data download to the RAM area or CPU or