SIEMENS SIMATIC S7-300 CPU 315F-2DP Fail-safe CPUs

CPU 315-2 DPCPU 315F-2DP

  • Based on the SIMATIC CPU 315-2 DP
  • For setting up a fail-safe automation system in plants with increased safety requirements
  • Complies with safety requirements to SIL 3 acc. to IEC 61508 and PL e acc. to ISO 13849.1
  • Distributed fail-safe I/O modules can be connected locally via the integrated PROFIBUS DP interface (PROFIsafe)
  • Fail-safe I/O modules of the ET 200M range can also be centrally connected
  • Central and distributed use of standard modules for non safety-oriented applications

SIMATIC Micro Memory Card required for operation of CPU.

Product No. / Product Description S7-300 CPU 315F-2DP Ordering data
6ES7315-6FF04-0AB0
SIMATIC S7-300, CPU 315F-2DP FAILSAFE CPU WITH MPI INTERFACE INTEGRATED 24V DC POWER SUPPLY, 384 KB WORKING MEMORY, 40MM WIDE, 2. INTERFACE DP-MASTER/SLAVE MICRO MEMORY CARD REQUIRED

Application

The CPU 315F-2 DP permits the design of a fail-safe automation system for plants with increased safety requirements, especially for production engineering.

Distributed I/O stations containing fail-safe I/O modules can be connected through the integrated PROFIBUS DP interface. The fail-safe I/O modules of ET 200M can also be centrally implemented safety-related.

Safety-related communication between the F CPU and the fail-safe I/O modules is performed on the basis of the PROFIsafe profile.


Design

The CPU 315F-2 DP features the following:

  • Microprocessor;
    the processor achieves a processing time of approximately 50 ns per binary instruction and 0.45 µs per floating-point operation.
  • Memory:
    384 KB high-speed RAM for safety-relevant and standard program sections; increased memory space requirements must be expected (5 times larger) if safety-relevant program sections are implemented. Of the 384 KB RAM, 128 KB data memory can be used for standard applications. SIMATIC Micro Memory Cards (max. 8 MB) as load memories for programs additionally permit storage of the project (including symbols and comments) in the CPU.
  • Flexible expansion capability;
    max. 32 modules, (4-tier configuration)
  • MPI multi-point interface;
    the integrated MPI interface can establish as many as 16 connections simultaneously to S7-300/400 or to the PG, PC, OP. Among these connections, one is always reserved for programming devices and another for OPs. The MPI makes it possible to set up a simple network with a maximum of 16 CPUs via “global data communication”.
  • PROFIBUS DP interface:
    The CPU 315F-2 DP with PROFIBUS DP master/slave interface allows a distributed automation configuration offering high speed and ease of use. From the user’s point of view, the distributed I/O is handled in the same manner as central I/O (identical configuration, addressing and programming).
    Distributed I/O stations with fail-safe I/O modules can be connected via the integral PROFIBUS DP interface. The fail-safe I/O modules of ET 200M can also be installed in central, safety-related configurations.
    The safety-oriented communication between the F-CPU and the fail-safe I/O modules is performed on the basis of the PROFIsafe profile.

Function

  • Password protection;
    a password concept protects the user program from unauthorized access.
  • Diagnostics buffer;
    the last 500 errors and interrupt events are saved in a buffer for diagnostics purposes.
  • Maintenance-free data back-up;
    all standard data is automatically written onto the SIMATIC Micro Memory Card by the CPU if there is a voltage interruption, and is available unchanged following voltage recovery.

Parameterizable properties

The S7 configuration as well as the properties and response of the CPUs can be parameterized using STEP 7:

  • MPI multipoint interface;
    determining station addresses
  • Restart/cycle time behavior;
    stipulation of maximum cycle time and loading as well as self-test functions
  • Clock bit memory;
    setting of addresses
  • Protection level;
    specifying the access rights to program and data
  • System diagnostics;
    determining handling and scope of the diagnostic alarms
  • Watchdog interrupts;
    setting of periodicity
  • Clock interrupts;
    setting of start date, start time and periodicity
  • PROFIBUS DP master/slave interface;
    user-defined address assignment for distributed I/O

Information and display functions

  • Status and error indications;
    LEDs indicate hardware, programming, time or I/O errors, and operating statuses such as RUN, STOP and start-up.
  • Test functions;
    the PG is used to indicate signal status during program execution, to modify process variables independently of the user program and to output the contents of stack memories.
  • Information functions;
    you can use the PG to obtain information about the storage capacity and operating mode of the CPU as well as the current loading of the main and load memories as well as current cycle times and diagnostic buffer contents in plain text.

Integrated communication functions

  • PG/OP communication
  • Global data communication
  • S7 basic communication
  • S7 communication (server only)
  • Routing
  • Data record routing

Communication

The safety-related and standard communication between the central controller and the distributed stations is performed via PROFIBUS DP. The specially developed PROFIBUS profile PROFIsafe supports the transfer of user data for the safety functions within the standard data message frame. Additional hardware components, e.g. special safety buses are not required. The necessary software is either integrated in the hardware components as an expansion of the operating system or loaded into the CPU later as a certified software block.

System functions

The CPU provides many extensive system functions for diagnostics, parameterization, synchronization, alerting, time measurement, etc.
For further details, see the manual.

Mode of operation

The safety functions of the F-CPU are included in the F program of the CPU and in the fail-safe signal modules.

The signal modules monitor the output and input signals by means of discrepancy analysis and the injection of test signals.

The CPU checks the proper operation of the controller by means of periodic self-tests, command tests and logic-based and time-based program execution checks. Furthermore, the I/O is checked using requests for signs of life.

If an error is diagnosed in the system, the system will be placed in a safe state.

An F runtime license is not required for operating the S7-300F-2 DP.

Programming

The CPU 315F-2 DP is programmed in the same manner as other SIMATIC S7 systems. The user program for non-fail-safe plant sections is created using familiar programming tools, e.g. STEP 7.

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

The STEP 7 option packages “SIMATIC S7 Distributed Safety” (Classic) or SIMATIC Safety Advanced V12 (TIA Portal V12) are required for programming the safety-related program sections. The package contains all the functions and blocks required to create an F program.

The F program with the safety functions is created in F-FBD or F-LAD or using special function blocks from the F library. Use of F FBD or F LAD simplifies configuration and programming of the plant and also acceptance testing thanks to the non-plant-specific uniform presentation form. The programmer can concentrate on configuration of the safety-related application without the need to use additional tools.


Technical specifications

Article number

6ES7315-6FF04-0AB0

CPU315F, 384KB

General information

HW functional status

01

Firmware version

V3.3

Engineering with

  • ● Programming package

STEP 7 V5.5 + SP1 or higher or STEP 7 V5.2 + SP1 or higher with HSP 218 + Distributed Safety

Supply voltage

Rated value (DC)

  • ● 24 V DC

Yes

permissible range, lower limit (DC)

19.2 V

permissible range, upper limit (DC)

28.8 V

external protection for power supply lines (recommendation)

2 A min.

Mains buffering

  • ● Mains/voltage failure stored energy time

5 ms

  • ● Repeat rate, min.

1 s

Input current

Current consumption (rated value)

850 mA

Current consumption (in no-load operation), typ.

150 mA

Inrush current, typ.

3.5 A

I²t

1 A²·s

Power loss

Power loss, typ.

4.5 W

Memory

Work memory

  • ● integrated

384 kbyte

  • ● expandable

No

  • ● Size of retentive memory for retentive data blocks

128 kbyte

Load memory

  • ● Plug-in (MMC)

Yes

  • ● Plug-in (MMC), max.

8 Mbyte

  • ● Data management on MMC (after last programming), min.

10 y

Backup

  • ● present

Yes; Guaranteed by MMC (maintenance-free)

  • ● without battery

Yes; Program and data

CPU processing times

for bit operations, typ.

0.05 µs

for word operations, typ.

0.09 µs

for fixed point arithmetic, typ.

0.12 µs

for floating point arithmetic, typ.

0.45 µs

CPU-blocks

Number of blocks (total)

1 024; (DBs, FCs, FBs); the maximum number of loadable blocks can be reduced by the MMC used.

DB

  • ● Number, max.

1 024; Number range: 1 to 16000

  • ● Size, max.

64 kbyte

FB

  • ● Number, max.

1 024; Number range: 0 to 7999

  • ● Size, max.

64 kbyte

FC

  • ● Number, max.

1 024; Number range: 0 to 7999

  • ● Size, max.

64 kbyte

OB

  • ● Description

see instruction list

  • ● Size, max.

64 kbyte

  • ● Number of free cycle OBs

1; OB 1

  • ● Number of time alarm OBs

1; OB 10

  • ● Number of delay alarm OBs

2; OB 20, 21

  • ● Number of cyclic interrupt OBs

4; OB 32, 33, 34, 35

  • ● Number of process alarm OBs

1; OB 40

  • ● Number of DPV1 alarm OBs

3; OB 55, 56, 57

  • ● Number of isochronous mode OBs

1; OB 61

  • ● Number of startup OBs

1; OB 100

  • ● Number of asynchronous error OBs

5; OB 80, 82, 85, 86, 87

  • ● Number of synchronous error OBs

2; OB 121, 122

Nesting depth

  • ● per priority class

16

  • ● additional within an error OB

4

Counters, timers and their retentivity

S7 counter

  • ● Number

256

Retentivity

  • — adjustable

Yes

  • — lower limit

0

  • — upper limit

255

  • — preset

Z 0 to Z 7

Counting range

  • — lower limit

0

  • — upper limit

999

IEC counter

  • ● Number

Unlimited (limited only by RAM capacity)

S7 times

  • ● Number

256

Retentivity

  • — adjustable

Yes

  • — lower limit

0

  • — upper limit

255

  • — preset

No retentivity

Time range

  • — lower limit

10 ms

  • — upper limit

9 990 s

IEC timer

  • ● present

Yes

  • ● Type

SFB

  • ● Number

Unlimited (limited only by RAM capacity)

Data areas and their retentivity

retentive data area in total

All, 128 KB max.

Flag

  • ● Number, max.

2 048 byte

  • ● Retentivity available

Yes; MB 0 to MB 2047

  • ● Retentivity preset

MB 0 to MB 15

  • ● Number of clock memories

8; 1 memory byte

Data blocks

  • ● Number, max.

1 024; Number range: 1 to 16000

  • ● Size, max.

64 kbyte

  • ● Retentivity adjustable

Yes; via non-retain property on DB

  • ● Retentivity preset

Yes

Local data

  • ● per priority class, max.

32 kbyte; Max. 2 KB per block

Address area

I/O address area

  • ● Inputs

2 048 byte

  • ● Outputs

2 048 byte

of which distributed

  • — Inputs

2 048 byte

  • — Outputs

2 048 byte

Process image

  • ● Inputs

2 048 byte

  • ● Outputs

2 048 byte

  • ● Inputs, adjustable

2 048 byte

  • ● Outputs, adjustable

2 048 byte

  • ● Inputs, default

384 byte

  • ● Outputs, default

384 byte

Subprocess images

  • ● Number of subprocess images, max.

1

Digital channels

  • ● Inputs

16 384

  • — of which central

1 024

  • ● Outputs

16 384

  • — of which central

1 024

Analog channels

  • ● Inputs

1 024

  • — of which central

256

  • ● Outputs

1 024

  • — of which central

256

Hardware configuration

Number of expansion units, max.

3

Number of DP masters

  • ● integrated

1

  • ● via CP

4

Number of operable FMs and CPs (recommended)

  • ● FM

8

  • ● CP, PtP

8

  • ● CP, LAN

10

Rack

  • ● Racks, max.

4

  • ● Modules per rack, max.

8

Time of day

Clock

  • ● Hardware clock (real-time)

Yes

  • ● retentive and synchronizable

Yes

  • ● Backup time

6 wk; At 40 °C ambient temperature

  • ● Deviation per day, max.

10 s; Typ.: 2 s

  • ● Behavior of the clock following POWER-ON

Clock continues running after POWER OFF

  • ● Behavior of the clock following expiry of backup period

Clock continues to run with the time at which the power failure occurred

Operating hours counter

  • ● Number

1

  • ● Number/Number range

0

  • ● Range of values

0 to 2^31 hours (when using SFC 101)

  • ● Granularity

1 hour

  • ● retentive

Yes; Must be restarted at each restart

Clock synchronization

  • ● supported

Yes

  • ● to MPI, master

Yes

  • ● to MPI, slave

Yes

  • ● to DP, master

Yes; With DP slave only slave clock

  • ● to DP, slave

Yes

  • ● in AS, master

Yes

  • ● in AS, slave

No

Digital inputs

Number of digital inputs

0

Digital outputs

Number of digital outputs

0

Analog inputs

Number of analog inputs

0

Analog outputs

Number of analog outputs

0

Interfaces

Number of industrial Ethernet interfaces

0

Number of RS 485 interfaces

2

Number of RS 422 interfaces

0

1. Interface

Interface type

Integrated RS 485 interface

Physics

RS 485

Isolated

No

Power supply to interface (15 to 30 V DC), max.

200 mA

Functionality

  • ● MPI

Yes

  • ● PROFIBUS DP master

No

  • ● PROFIBUS DP slave

No

  • ● Point-to-point connection

No

MPI

  • ● Transmission rate, max.

187.5 kbit/s

Services

  • — PG/OP communication

Yes

  • — Routing

Yes

  • — Global data communication

Yes

  • — S7 basic communication

Yes

  • — S7 communication

Yes; Only server, configured on one side

  • — S7 communication, as client

No

  • — S7 communication, as server

Yes

2. Interface

Interface type

Integrated RS 485 interface

Physics

RS 485

Isolated

Yes

Power supply to interface (15 to 30 V DC), max.

200 mA

Functionality

  • ● MPI

No

  • ● PROFIBUS DP master

Yes

  • ● PROFIBUS DP slave

Yes

  • ● Point-to-point connection

No

DP master

  • ● Transmission rate, max.

12 Mbit/s

  • ● Number of DP slaves, max.

124; Per station

Services

  • — PG/OP communication

Yes

  • — Routing

Yes

  • — Global data communication

No

  • — S7 basic communication

Yes; I blocks only

  • — S7 communication

Yes; Only server, configured on one side

  • — S7 communication, as client

No

  • — S7 communication, as server

Yes

  • — Equidistance

Yes

  • — Isochronous mode

Yes; OB 61

  • — SYNC/FREEZE

Yes

  • — Activation/deactivation of DP slaves

Yes

  • — Number of DP slaves that can be simultaneously activated/deactivated, max.

8

  • — DPV1

Yes

Address area

  • — Inputs, max.

2 048 byte

  • — Outputs, max.

2 048 byte

User data per DP slave

  • — Inputs, max.

244 byte

  • — Outputs, max.

244 byte

DP slave

  • ● GSD file

The latest GSD file is available at: http://www.siemens.com/profibus-gsd

  • ● Transmission rate, max.

12 Mbit/s

  • ● automatic baud rate search

Yes; only with passive interface

  • ● Address area, max.

32

  • ● User data per address area, max.

32 byte

Services

  • — PG/OP communication

Yes

  • — Routing

Yes; Only with active interface

  • — Global data communication

No

  • — S7 basic communication

No

  • — S7 communication

Yes; Only server, configured on one side

  • — S7 communication, as client

No

  • — S7 communication, as server

Yes

  • — Direct data exchange (slave-to-slave communication)

Yes

  • — DPV1

No

Transfer memory

  • — Inputs

244 byte

  • — Outputs

244 byte

Isochronous mode

Isochronous operation (application synchronized up to terminal)

Yes

Communication functions

PG/OP communication

Yes

Data record routing

Yes

Global data communication

  • ● supported

Yes

  • ● Number of GD loops, max.

8

  • ● Number of GD packets, max.

8

  • ● Number of GD packets, transmitter, max.

8

  • ● Number of GD packets, receiver, max.

8

  • ● Size of GD packets, max.

22 byte

  • ● Size of GD packet (of which consistent), max.

22 byte

S7 basic communication

  • ● supported

Yes

  • ● User data per job, max.

76 byte

  • ● User data per job (of which consistent), max.

76 byte; 76 bytes (with X_SEND or X_RCV); 64 bytes (with X_PUT or X_GET as server)

S7 communication

  • ● supported

Yes

  • ● as server

Yes

  • ● as client

Yes; Via CP and loadable FB

  • ● User data per job, max.

180 byte; With PUT/GET

  • ● User data per job (of which consistent), max.

240 byte; as server

S5 compatible communication

  • ● supported

Yes; via CP and loadable FC

Number of connections

  • ● overall

16

  • ● usable for PG communication

15

  • — reserved for PG communication

1

  • — adjustable for PG communication, min.

1

  • — adjustable for PG communication, max.

15

  • ● usable for OP communication

15

  • — reserved for OP communication

1

  • — adjustable for OP communication, min.

1

  • — adjustable for OP communication, max.

15

  • ● usable for S7 basic communication

12

  • — reserved for S7 basic communication

0

  • — adjustable for S7 basic communication, min.

0

  • — adjustable for S7 basic communication, max.

12

S7 message functions

Number of login stations for message functions, max.

16; Depending on the configured connections for PG/OP and S7 basic communication

Process diagnostic messages

Yes

simultaneously active Alarm-S blocks, max.

300

Test commissioning functions

Status block

Yes; Up to 2 simultaneously

Single step

Yes

Number of breakpoints

4

Status/control

  • ● Status/control variable

Yes

  • ● Variables

Inputs, outputs, memory bits, DB, times, counters

  • ● Number of variables, max.

30

  • — of which status variables, max.

30

  • — of which control variables, max.

14

Forcing

  • ● Forcing

Yes

  • ● Forcing, variables

Inputs, outputs

  • ● Number of variables, max.

10

Diagnostic buffer

  • ● present

Yes

  • ● Number of entries, max.

500

  • — adjustable

No

  • — of which powerfail-proof

100; Only the last 100 entries are retained

  • ● Number of entries readable in RUN, max.

  • — can be set

Yes; From 10 to 499

  • — preset

10

Service data

  • ● can be read out

Yes

Ambient conditions

Ambient temperature during operation

  • ● min.

0 °C

  • ● max.

60 °C

Configuration

Configuration software

  • ● STEP 7

Yes; V5.2 SP1 or higher with HW update

Programming

  • ● Command set

see instruction list

  • ● Nesting levels

8

  • ● System functions (SFC)

see instruction list

  • ● System function blocks (SFB)

see instruction list

Programming language

  • — LAD

Yes

  • — FBD

Yes

  • — STL

Yes

  • — SCL

Yes

  • — CFC

Yes

  • — GRAPH

Yes

  • — HiGraph®

Yes

Know-how protection

  • ● User program protection/password protection

Yes

  • ● Block encryption

Yes; With S7 block Privacy

Dimensions

Width

40 mm

Height

125 mm

Depth

130 mm

Weights

Weight, approx.

290 g