CPUs - CPU 315-2 DP






Overview

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The CPU with medium to large program memory and quantity framework for the use, if required, of SIMATIC Engineering Tools
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High processing performance in binary and floating-point arithmetic
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PROFIBUS DP master/slave interface
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For extensive I/O configurations
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For setting up distributed I/O structures
Micro memory card required for operation of CPU.


Application


The CPU 315-2 DP is a CPU with medium to large program memory and PROFIBUS DP master/slave interface. It is used in installations which have
distributed automation structures in addition to a centralized I/O.
It is often used as the standard PROFIBUS DP master in SIMATIC S7-300. The CPU is also used as distributed intelligence (DP slave).
It has been optimized in terms of its quantitative framework for using SIMATIC Engineering Tools, e.g.,:
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Programming with SCL

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Sequence control programming with S7-GRAPH
In addition, the CPU offers an ideal platform for simple technology tasks implemented in software, e.g.,:
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Easy Motion Control
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The solution of closed-loop control tasks with STEP 7 blocks or the runtime software Standard/Modular PID Control
Extended process diagnostics can be achieved by using SIMATIC S7-PDIAG.


Design


The CPU 315-2 DP is equipped with the following:
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Microprocessor;
the processor achieves an execution time of approximately 100 ns per binary instruction and 3 µs per floating-point operation.
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128 KB RAM (corresponds to approx. 43 K statements);
the extensive RAM for execution-related program sections offers sufficient space for user programs. Micro memory cards (8 MB max.) as load
memory for the program also allow the project to be stored in the CPU (complete with symbols and comments) which can be used for data archiving
and recipe management.
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Flexible expansion;
up to 32 modules (4-tier configuration)
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Interface with multipoint capability (MPI);
the integrated MPI interface can establish up to 16 simultaneous connections to S7-300/400 or to PG, PC, OP. Among these connections, one is

always reserved for PG and another for OP. The MPI makes it possible to set up a simple network with a maximum of 16 CPUs via "global data
communication".
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PROFIBUS DP interface
the CPU 315-2 DP with PROFIBUS DP master/slave interface enables distributed automation configurations with high speed and ease of handling.
From the user's point of view, the distributed I/O is treated as central I/O (same configuring, addressing and programming).
the PROFIBUS DP V1 standard is fully supported. This increases the scope of DP V1 standard slaves in terms of diagnostics and parameterization
capability.


Function

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Password protection;
a password concept protects the user program from unauthorized access.
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Diagnostics buffer;
the last 100 errors and interrupt events are saved in a buffer for diagnostics purposes
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Maintenance-free data backup;
the CPU automatically writes all data to the micro memory card in case of power failure, so that it remains available unchanged when the power is
turned on again.
Configurable attributes

STEP 7 can be used to parameterize both S7 configurations and the properties and responses of the CPUs:
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Interface with multipoint capability (MPI);
definition of node addresses
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Restart/cycle performance characteristics;

determination of the maximum cycle time and load, as well as of the self-testing functions
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Clock bit memory;
address settings
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Protection level;
definition of access authorizations to program and data
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System diagnostics;
definition of the handling and scope of diagnostic messages
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Time interrupts;
periodicity settings
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Time-of-day interrupts;
start date, start time and periodicity settings
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PROFIBUS DP master/slave interface;
free address assignment for distributed I/O
Reporting functions

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Status and fault indicators;
LEDs indicate events such as hardware, programming, timer, I/O, battery or bus errors/faults and operating statuses such as RUN, STOP, startup.
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Testing functions;
you can use the PG to display signal states in program execution, modify process tags irrespective of the user program, and read out the contents of
stack memories.
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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 work and load
memories, current scan times and diagnostic buffer contents in plain language.
Integrated communication functions

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PG/OP communication
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S7 standard communication
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S7 communication (server only)
System functions

The CPU offers a wide range of system functions for diagnosis, parameterization, synchronization, alarm signaling, time measurement, etc.
For further details, see manual.


Technical specifications


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6ES7 315-2AG10-0AB0
Product version



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Associated programming package
STEP 7 as of 5.1 + SP 4


Supply voltages



Rated value



24 V DC Yes

permissible range, lower limit (DC) 20.4 V

permissible range, upper limit (DC) 28.8 V

Voltages and currents



z External fusing for supply lines (recommendation)
Min. 2 A

Current consumption



z Inrush current, typ.
2.5 A

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I²t
0.5 A²s

z Current consumption (idling), type
60 mA

z from supply voltage L+, max.
800 mA

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Power dissipation, typical
2.5 W

Memory/backup



Memory



z Working memory


integral 128 KByte

expandable No

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Load memory



pluggable (MMC) Yes

pluggable (MMC), max. 8 MByte

Backup



available Yes

CPU/blocks



DB



Number, max. 1,024

Size, max. 16 KByte

FB



Number, max. 2,048


Size, max. 16 KByte

FC



Number, max. 2,048

Size, max. 16 KByte

OB



Size, max. 16 KByte

Nesting depth



per priority class 8

additional levels within an error OB 4

CPU/processing times



z for bit instruction, min.
0.1 µs


z for word instruction, min.
0.2 µs

z for integer math, min.
2 µs

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for floating-point math, min.
3 µs

Timers/counters and their retentive characteristics



S7 counter



Number 256

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of which retentive without battery


adjustable Yes

z Retentivity



adjustable Yes

z Counting range


adjustable Yes

lower limit 0

upper limit 999

IEC counter



available Yes

Type SFB

S7 times



Number 256

z Retentivity


adjustable Yes


preset No retention

z Timing range


lower limit 10 ms

upper limit 9,990 s

IEC timer



available Yes

Type SFB

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Data areas and their retentive characteristics



Flags



Number 2,048 Byte

adjustable retentivity Yes


Number of clock memories 8

Data blocks



Number, max. 1,023

Size, max. 16 KByte

Local data



per priority class, max. 128 Byte

Address area



I/O address area



Inputs 2 KByte

Outputs 2 KByte

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of which distributed


Inputs 2 KByte

Outputs 2 KByte

Process image



Inputs 128 Byte

Outputs 128 Byte

Digital channels



Inputs 16,384

Outputs 16,384

Inputs, of which central 1,024

Outputs, of which central 1,024

Analog channels




Inputs 1,024

Outputs 1,024

Inputs, of which central 256

Outputs, of which central 256

Configuration



z Racks, max.
4

z Modules per rack, max.
8

Number of DP masters



integral 1

via CP 4

Number of FMs and CPs that can be operated (recommendation)




FM 8

CP, point-to-point 8

CP, LAN 10

Time



Clock



Hardware clock (realtime clock) Yes

buffered Yes

Deviation per day, max 10 s

Run-time meter



Quantity 1

Number 0

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


Granularity 1 hour

retentive Yes

Time synchronization



supported Yes

on MPI, master Yes

on MPI, slave Yes

in AS, master Yes

S7 message functions



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Number of stations that can log on for message functions, max.
16

z Process diagnostic messages
Yes

z simultaneously active Alarm-S blocks, max.
40


Test and startup functions



Status/modify



Variable Yes

Variables Inputs, outputs, flags, DB, timers, counters

Number of variables, max. 30

of which status variables, max. 30

of which modify variables, max. 14

Forcing



Forcing Yes

Forcing, variables Inputs, outputs

Forcing, number of variables, max. 10

z Status block

Yes

z Single step
Yes

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Number of breakpoints
2

Diagnostic buffer



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available Yes

Number of inputs, max. 100

adjustable No

Communication functions



z PG/OP communication
Yes

z Routing
Yes


Global data communication



supported Yes

Size of GD packets, max. 22 Byte

S7 basic communication



supported Yes

S7 communication



supported Yes

S5 compatible communication



supported Yes

Number of connections




overall 16

usable for PG communication 15

usable for OP communication 15

usable for S7 basic communication 12

usable for routing 4

1st interface



z Type of interface
integrated RS 485 interface

z Physical
RS 485

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Isolated
No

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

Functionality




MPI Yes

DP master No

DP slave No

Point-to-point connection No

MPI



Number of connections 16

z Services


PG/OP communication Yes

Routing Yes

Global data communication Yes

S7 basic communication Yes

S7 communication Yes

S7 communication, as client No; via CP and loadable FB


S7 communication, as server Yes

Transmission rates, max. 187.5 kBit/s

2nd interface



z Type of interface
integrated RS 485 interface

z Physical
RS 485

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Isolated
Yes

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

Functionality



MPI No

DP master Yes


DP slave Yes

Point-to-point connection No

DP master



Number of connections, max. 16

z Services


PG/OP communication Yes

Routing Yes

Global data communication No

S7 basic communication No

S7 communication No

S7 communication, as client No

S7 communication, as server No

Equidistance support Yes

SYNC/FREEZE Yes


DPV1 Yes

Transmission rates, max. 12 Mbit/s

Number of DP slaves, max. 124; per station

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Address area


Inputs, max. 244 KByte

Outputs, max. 244 KByte

DP slave



Number of connections 16

z Services


PG/OP communication Yes

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Routing Yes; with active interface

Global data communication No

S7 basic communication No

S7 communication, as client No

S7 communication, as server No

Direct data exchange (lateral communication) Yes

DPV1 No

GSD file under Product Support

Transmission rates, max. 12 Mbit/s

Automatic baud rates search Yes

z Intermediate memory


Inputs 244 Byte

Outputs 244 Byte

Address areas, max. 32

User data per address area, max. 32 Byte


CPU/ programming



Programming language



STEP 7 Yes; as of V 5.1 SP4

KOP Yes

FUP Yes

AWL Yes

SCL Yes

CFC Yes

GRAPH Yes

HiGraph® Yes

Software library



z Instruction set

See instruction list

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Bracket levels
8

z User program protection/password protection
Yes

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System functions (SFC)
See instruction list

z System function blocks (SFB)
see instruction list

Dimensions and weight



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Width
40 mm

z Height
125 mm

z Depth
130 mm


z Weight, approx.
290 g

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