Siemens SIMATIC S7-300 CPU Data: CPU 315-T-2 DP, Manual

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Table of contents
Monitoring of 24 V load circuits
Entry-ID: 61450284, V1.1, 05/2014
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Table of contents
Warranty and liability ................................................................................................... 2
1 Task ..................................................................................................................... 5
2 Solution............................................................................................................... 7
2.1 Overview of the general solution .......................................................... 7
2.2 Description of the core functionality ................................................... 10
2.3 Hardware and software components used......................................... 13
3 Basics on Control Messages (PLC Alarms) .................................................. 15
4 Functional Mechanisms of the Application .................................................. 16
4.1 User program of the S7-CPU ............................................................. 16
4.2 Signal evaluation with the PSE_DIAG (FB50) block .......................... 18
4.3 HMI interface ...................................................................................... 22
4.4 Visualization ....................................................................................... 23
4.4.1 Displaying the states .......................................................................... 23
4.4.2 Controls the remote reset input (RST) of the PSE200U module ....... 24
4.4.3 Displaying the control messages (PLC alarms) ................................. 25
4.5 Message generation with the Messages block (FB10) ...................... 26
5 Configuration and Settings............................................................................. 31
5.1 Creating the alarm class..................................................................... 31
5.2 Configuring control messages (PLC alarms) ..................................... 33
5.2.1 Filling the block interface of the Messages (FB10) block and
calling the ALARM_D message blocks. ............................................. 33
5.2.2 ALARM_D message block ................................................................. 34
5.2.3 Inputs and outputs of the ALARM_D message block ........................ 35
5.2.4 Editing the PLC alarms in the Alarm class editor ............................... 38
5.2.5 Display PLC alarm at the SIMATIC Panel .......................................... 39
5.3 Changing the I/O addresses .............................................................. 40
6 Installation ........................................................................................................ 41
6.1 Hardware configuration ...................................................................... 41
6.1.1 Structure ............................................................................................. 41
6.1.2 Overview of the I/O addresses ........................................................... 42
6.1.3 Overview of IP addresses .................................................................. 42
6.2 Software installation ........................................................................... 42
6.3 Installing the application software ...................................................... 43
7 Starting up the Application ............................................................................. 44
7.1 Preparation ......................................................................................... 44
7.1.1 Changing the IP address of the PG/PC ............................................. 44
7.1.2 Changing the IP address of the SIMATIC Panel ................................ 45
7.1.3 Changing the IP address of SIMATIC S7-300 CPU ........................... 46
7.2 Commissioning ................................................................................... 49
7.2.1 Transferring the project to the SIMATIC Panel .................................. 49
7.2.2 Loading the project into the S7-CPU .................................................. 52
7.3 Using the application with STEP 7 / WinCC V13 ............................... 54
8 Operation of the Application .......................................................................... 58
8.1 Overview............................................................................................. 58
8.2 Start screen ........................................................................................ 59
8.3 Sample project ................................................................................... 59
8.3.1 “Overview” screen .............................................................................. 60
8.3.2 “State of the outputs of the SITOP PSE200U” screen ....................... 61
8.4 Examples for the operation ................................................................ 64