Safety Instrumented System SIS Module CPU315F-2PN/DP

Safety Instrumented System SIS Module CPU315F-2PN/DP

SIMATIC S7-300 CPU315F-2 PN/DP， Central processing unit, equipped with 512 KByte main memory, 1 MPI/DP 12MBit/s interface, 2 Ethernet PROFINET interfaces, with dual port switch, requires a miniature memory card, order number: 6ES7315-2FJ14-0AB0.

The safety instrumented system SIS module CP315F-2PN/DP, compared to the CPU 315-2DP, has distributed fault safety I/O modules that can not only be locally connected through the integrated PROFINET interface (PROFIsafe), but also connected through the integrated PROFIBUS DP interface (PROFIsafe).

A CPU with medium program memory and program size is used to establish a fault safety instrumented system (SIS), suitable for factory safety levels up to SIL 3 (IEC 61508) and PL e (ISO 13849.1) for increased safety requirements. The fault safety ET 200M I/O module can also be centrally connected, and for non safety applications, standard modules can be used centrally and distributedly through PROFINET's Component Based Automation (CBA) PROFINET I/O controller for running distributed I/O on PROFINET, PROFINET agent for 2-port switches, and PROFIBUS DP smart devices in Component Based Automation (CBA). The operation of the CPU requires SIMATIC miniature memory cards.

1、 Application of Safety Instrumented System SIS Module CP315F-2PN/DP

The CPU 315F-2 PN/DP allows for the implementation of fail safe automation systems on devices to meet increased safety requirements, particularly in manufacturing automation.

Can be used as a PROFINET IO controller and a standard PROFIBUS DP master in SIMATIC S7-300. CPU 315F-2 PN/DP can also be used as a distributed intelligent slave (DP slave).

Distributed I/O stations containing fail safe I/O modules can be connected through two integrated interfaces. The ET 200M fail safe I/O module can also be installed in safety related central configurations.

Implement secure communication between F-CPU and fault-tolerant I/O modules based on PROFIsafe specifications. The operation of the CPU requires SIMATIC miniature memory cards (MMC cards).

2、 Design of Safety Instrumented System SIS Module CP315F-2PN/DP

The CPU 315F-2 PN/DP is installed with:

microprocessor:
The execution time for each binary instruction by the processor is about 50 ns, and each floating-point operation is about 450 ns.

Memory:
512 KB high-speed RAM, used for secure program segments and standard program segments; If executing a secure program segment, additional memory space requirements (more than 5 times) must be considered. SIMATIC miniature memory cards (up to 8 MB) serve as loading memory for programs and also allow items (including symbols and annotations) to be stored in the CPU.

Flexible scalability:
Up to 32 modules can be used (4-layer configuration)

MPI/DP combination interface
The first built-in MPI/DP interface can establish up to 16 connections simultaneously with S7-300/400 or with PG, PC, and OP. In these connections, always reserve one connection each for the programmer and operator panel. 32 CPUs can be easily networked through MPI interface and "global data communication". This interface can be reset from MPI interface to DP interface. The DP interface can be used as a DP master station or DP slave station for operation.
PROFIBUS DP interface:
Fully supports PROFIBUS DP V1 standard. This will increase the diagnostic and parameter assignment capabilities of the DP V1 standard.

Ethernet interface;
The second built-in interface of CPU 315-2 PN/DP is a PROFINET interface based on Ethernet TCP/IP, with a dual port switch. It supports the following protocols:

S7 communication is used for data communication between SIMATIC controllers;

PG/OP communication for programming, startup, and diagnosis through STEP 7;

PG/OP communication connected to HMI and SCADA;

Open TCP/IP communication based on PROFINET and SIMATIC NET OPC servers, used for communication with other controllers and I/O devices with separate CPUs.

3、 Safety Instrumented System SIS Module CPU 315F-2PN/DP Function

Password protection;
By using a password, the user program can be protected from unauthorized access.

Diagnostic buffer;
The last 500 error and interrupt events are saved in the buffer for diagnostic purposes.

Maintenance free data backup;
When the power supply fails, the CPU will automatically save all data, and when the power supply is restored, these data will remain unchanged.

Parameterized features

You can use STEP 7 to set parameters for the configuration, properties, and CPU response of S7:

Multi point interface (MPI);
Determine the node address.

Restart/cycle performance characteristics;
Set maximum cycle time and load

Clock Memory:
Set Address

Protection level;
Definition of Access Permissions for Programs and Data

System diagnosis;
Determine the scope of processing and diagnosing messages

Monitor interrupt;
Define cycle time

Real time interrupt;
Set the start date, start time, and interval period.

PROFIBUS DP master/slave interface;
User defined address allocation, suitable for distributed I/O

Display function and information function

Status and error indication;
LED displays, such as hardware, programming, timers, etc I/O、 Bus faults and operational status, such as RUN, STOP, startup.

Testing functionality;
Using a programmer to display the signal status during program execution, process variables can be modified and stack contents can be output without the need for user programming.

Information function;
Provide users with storage capacity information, CPU operating mode, current usage of main memory and load memory, current cycle time, and diagnostic buffer content in text form through a programmer.

Integrated communication function

Programmer/OP communication

Global data communication

S7 Basic Communication

S7 Communication

Open communication via TCP/IP

PROFINET CBA (Component based Automation)

Web server

Data record routing

4、 Safety Instrumented System SIS Module CPU 315F-2PN/DP Communication

The secure communication and standard communication between the central controller and distributed stations are carried out on PROFIBUS DP and/or PROFINET. The specially developed PROFIsafe supports the transmission of user data with security features in standard data packets. No other hardware components are required, such as a special safety bus. The required software can be integrated into hardware components as an extension of the operating system, or loaded into the CPU as a software block.

5、 Safety Instrumented System SIS Module CP315F-2PN/DP Operation Mode

The safety function of F-CPU is included in the F program of CPU and the fault safety signal module. The signal module uses differential analysis methods and test signal injection techniques to monitor input and output signals. The CPU checks the correctness of the controller's operation through periodic self checks, command testing, and logic and time-based program execution checks. In addition, I/O can also be detected through "sign of life" requests. When the system diagnoses a fault, it will enter a safe state. Running CPU 315F-2 PN/DP does not require F-run version authorization.

6、 Programming of Safety Instrumented System SIS Module CP315F-2PN/DP

The programming method for CPU 315F-2 PN/DP is the same as that for SIMATIC S7 system. Non secure user programs can be created using programming tools such as STEP 7.

Option package SIMATIC S7 Distributed Safety (Classic) and SIMATIC Safety Advanced V12 (TIA Portal V12)

The STEP 7 option package "SIMATIC S7 Distributed Safety" (Classic) or SIMATIC Safety Advanced V12 (TIA Portal V12) is used for programming safety program segments. The option package includes all the functions and blocks used to create the F program.

F-programs with security features can be connected using either F-FBD or F-LAD, or by utilizing special function data blocks in the F-function library. The use of F FBD or F LAD can provide a unified representation across systems, simplifying system configuration, programming, and acceptance testing. Programmers can configure secure applications without the need for other tools.