MPI / PROFIBUS DP
Integrated isolated RS 485 interface. Supports MPI communication and PROFIBUS DP Master or DP Device operation, with transmission rates up to 12 Mbps.
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Siemens 6ES7315-2EH14-0AB0 SIMATIC S7-300 CPU 315-2 PN/DP 384 KB
Siemens 6ES7315-2EH14-0AB0 SIMATIC S7-300 CPU 315-2 PN/DP 384 KB
CPU 315-2 PN/DP
SIMATIC S7-300 Central Processing Unit
6ES7315-2EH14-0AB0 manual
Place of Origin:
Germany
Brand Name:
Siemens
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CPU 315-2 PN/DP
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Delivery Time
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Product Description
SIMATIC S7-300 · Central Processing Unit
Siemens 6ES7315-2EH14-0AB0
CPU 315-2 PN/DP with 384 KB work memory, an MPI/PROFIBUS DP interface and a two-port PROFINET Ethernet interface.
6ES7 315-2EH14-0AB0
KEY PRODUCT INFORMATION
CPU
CPU 315-2 PN/DPSIMATIC S7-300 controller
384
384 KB Work MemoryIntegrated program and data memory
DP
MPI / PROFIBUS DPIntegrated isolated RS 485 interface
PN
PROFINET EthernetTwo RJ45 ports with integrated switch
Controller Core for S7-300 Automation
The 6ES7315-2EH14-0AB0 is a SIMATIC S7-300 CPU 315-2 PN/DP central processing unit. It executes the control program and provides communication paths for programming, operator access, distributed I/O and connected automation equipment.
Its two integrated communication interfaces combine MPI/PROFIBUS DP over RS 485 with PROFINET over two RJ45 ports. The CPU supports PROFINET IO Controller and IO Device functions, allowing it to participate in different network roles according to the configured system architecture.
Communication architecture
Two Integrated Network Interfaces
Separate fieldbus and Ethernet paths support communication across the S7-300 control environment.
PROFINET Ethernet
Two RJ45 ports with an integrated switch. Supports 10/100 Mbps transmission, PROFINET IO Controller and IO Device functions, and open Industrial Ethernet communication.
384 KB Work Memory
Integrated work memory for the user program and process data, with plug-in Micro Memory Card load memory required for operation.
Application context
Where This CPU Is Used
Typical system context and maintenance situations relevant to an S7-300 CPU 315-2 PN/DP.
S7-300 Machine Control
Used as the central controller in an S7-300 automation station, executing the STEP 7 user program and coordinating local control tasks and connected I/O.
Distributed I/O Networks
Used where the control system exchanges process data with PROFIBUS DP devices or PROFINET IO devices. The CPU can operate as a DP Master or DP Device and as a PROFINET IO Controller or IO Device.
Maintenance & Downtime Scenarios
Customers may search for this CPU when an existing S7-300 station reports a CPU fault, fails to enter RUN, loses network communication or requires a matching replacement after hardware failure. A controller outage can interrupt the machine sequence and the I/O data exchange dependent on that station.
Product data
Technical Specifications
Model-specific data for order number 6ES7315-2EH14-0AB0. The key identification, power and memory groups are displayed first; additional engineering data can be expanded below.
384 KBIntegrated Work Memory
24 V DCRated Supply Voltage
2 × RJ45PROFINET Ports
Product Identification & Engineering
ManufacturerSiemens
Product FamilySIMATIC S7-300
Product TypeCPU 315-2 PN/DP
Order Number6ES7315-2EH14-0AB0
Hardware Functional Status01
Firmware VersionV3.2
Programming PackageSTEP 7 V5.5 or higher
Isochronous ModeVia PROFIBUS DP or PROFINET
Power Supply & Electrical Data
Rated Supply Voltage24 V DC
Permissible Voltage Range20.4–28.8 V DC
External Cable Protection Recommendation2 A minimum
Rated Current Consumption750 mA
No-load Current Consumption, Typical150 mA
Inrush Current, Typical4 A
I²t1 A²·s
Typical Power Loss4.65 W
Stored Energy Time During Voltage Failure5 ms
Minimum Repeat Rate1 s
Memory & Processing
Integrated Work Memory384 KB
Work Memory ExpandableNo
Load MemoryPlug-in Micro Memory Card (MMC)
Maximum MMC Capacity8 MB
MMC Data Retention After Last ProgrammingMinimum 10 years
BackupMaintenance-free backup via MMC
Battery-free BackupProgram and data
Maximum Retentive Data Area128 KB
Bit Operation Time, Typical0.05 µs
Word Operation Time, Typical0.09 µs
Fixed-point Operation Time, Typical0.12 µs
Floating-point Operation Time, Typical0.45 µs
Expand CPU Blocks, Counters & Timers
Total DB / FC / FB Blocks1,024
Maximum DB Count1,024
DB Number Range1–16,000
Maximum FB Count1,024
FB Number Range0–7,999
Maximum FC Count1,024
FC Number Range0–7,999
Maximum DB / FB / FC Size64 KB each
Maximum OB Size64 KB
S7 Counters256
S7 Timer Count256
S7 Timer Range10 ms–9,990 s
IEC Counters / TimersSFB-based; limited by RAM capacity
Maximum Local Data per Priority Class32,768 bytes
Maximum Local Data per Block2,048 bytes
Expand Address Areas & I/O Capacity
Input Address Area2,048 bytes
Output Address Area2,048 bytes
Distributed Input Address Area2,048 bytes
Distributed Output Address Area2,048 bytes
Process Image Inputs2,048 bytes maximum
Process Image Outputs2,048 bytes maximum
Default Process Image128 bytes input / 128 bytes output
Digital Inputs16,384; 1,024 central
Digital Outputs16,384; 1,024 central
Analog Inputs1,024; 256 central
Analog Outputs1,024; 256 central
Subprocess Images1 maximum
PROFINET IO Subprocess Image User DataMaximum 1,600 bytes
Expand Hardware Configuration & Rack Data
Expansion Units3 maximum
Integrated DP Masters1
DP Masters via CP4
Recommended FM Modules8
Recommended CP PtP Modules8
Recommended CP LAN Modules10
Maximum Racks4
Maximum Modules per Rack8
MPI & PROFIBUS DP Interface
Interface TypeIntegrated isolated RS 485
Interface Output Current200 mA maximum
MPI Transmission Rate12 Mbps maximum
PROFIBUS DP Transmission Rate12 Mbps maximum
DP Master Device Count124 maximum
DP Master Input Address Area2 KB maximum
DP Master Output Address Area2 KB maximum
DP User Data per Device244 bytes input / 244 bytes output
DP Device Address Area32 maximum
DP Device User Data per Address Area32 bytes maximum
DPV1Supported in DP Master mode
Isochronous ModeSupported; alternatively via DP or PROFINET IO
PROFINET Interface
Interface TypePROFINET Ethernet
Physical ConnectorRJ45
Port Count2
Integrated SwitchYes
Transmission Rate10/100 Mbps, automatic detection
Autonegotiation / AutocrossingSupported
PROFINET IO ControllerSupported
PROFINET IO DeviceSupported
PROFINET CBASupported
Open IE CommunicationTCP/IP, ISO-on-TCP and UDP
Web ServerSupported
Media RedundancySupported
Maximum IO Devices128
Maximum IO Devices with IRT64
Maximum IO Controller Input / Output Address Area2 KB each
Maximum Consistent User Data1,024 bytes
Maximum Open IE Connections8
Maximum HTTP Clients5
PROFINET MRP Typical Switchover200 ms
Maximum Stations in MRP Ring50
Expand Diagnostics, Programming & Protection
Diagnostic Buffer500 entries maximum
Power-fail-proof Entries100; last 100 retained
Entries Readable in RUN10–499; preset 10
Service DataCan be read out
Status / Control Variables30 maximum
Control Variables14 maximum
Forced Variables10 maximum
Programming LanguagesLAD, FBD, STL, SCL, CFC, GRAPH, HiGraph
Password ProtectionSupported
Block EncryptionS7 block Privacy
Expand Time Functions, Environment & Mechanical Data
Real-time Hardware ClockYes
Clock Backup Time6 weeks at 40 °C ambient
Maximum Clock Deviation per Day10 s; typical 2 s
Clock SynchronizationMPI, DP, AS and Ethernet via NTP client
Operating Temperature0–60 °C
Width40 mm
Height125 mm
Depth130 mm
Approximate Weight340 g
The CPU has no integrated digital or analog input/output channels. I/O capacity shown above refers to the CPU address areas and supported distributed I/O resources, not onboard physical I/O points.
Commissioning & maintenance
Configuration and Diagnostics
Key checks when commissioning or troubleshooting this CPU in an existing S7-300 installation.
STEP 7 EngineeringUse STEP 7 V5.5 or higher for configuration and programming, as specified in the Siemens product data.
Micro Memory CardThe CPU requires a plug-in MMC for load memory. The specified maximum MMC capacity is 8 MB.
Network ConfigurationCheck the configured MPI/DP address and PROFINET IP settings against the project and connected network devices.
Diagnostic BufferUse the CPU diagnostic buffer to review stored diagnostic events. Up to 500 entries are supported.
MPI / PROFIBUS DP · RS 485 PROFINET · Dual RJ45 Ports STEP 7 V5.5 or Higher
Product lifecycle
Ordering & Replacement Considerations
i
Spare Part / Product Cancellation
Siemens identifies 6ES7315-2EH14-0AB0 as a spare part and lists its lifecycle status as Product Cancellation. For an existing installation, confirm the complete order number, hardware status, firmware/project requirements, MMC contents and communication configuration before selecting a replacement. No direct successor is stated here.
Technical questions
Frequently Asked Questions
Which communication interfaces are integrated into the CPU 315-2 PN/DP?
The CPU has an integrated isolated RS 485 interface for MPI and PROFIBUS DP, plus a PROFINET Ethernet interface with two RJ45 ports and an integrated switch.
Can the 6ES7315-2EH14-0AB0 operate as a PROFINET IO Controller?
Yes. The integrated PROFINET interface supports both PROFINET IO Controller and IO Device functions. The actual role depends on the configured automation architecture.
Is a Micro Memory Card needed for operation?
Yes. This CPU uses a plug-in Micro Memory Card as load memory. The listed maximum MMC capacity is 8 MB.
Which STEP 7 version is specified for engineering?
The Siemens product data specifies STEP 7 V5.5 or higher for engineering with this CPU.
What should be verified before installing a replacement unit?
Verify the full order number, hardware and firmware status, STEP 7 project, MMC, rack arrangement, network settings and connected I/O configuration. Confirm the replacement against the installed system before commissioning.
AMIKON Industrial Supply
Industrial Parts Sourcing & Support
Miya Zheng
Industrial Parts Sourcing, Kept Practical. AMIKON supports industrial buyers with part-number sourcing, order coordination and practical communication for automation components.
sales@amikon.cn +86 180 2077 6792Part Number Review Testing & Inspection Protective Packaging
Delivery, Warranty & RFQ
Items are checked before dispatch and packed for transport protection. DOA or return requests are reviewed against order details and reported condition; contact AMIKON promptly with photos and test information. Warranty coverage is 12 months, subject to the terms stated in the quotation. For an RFQ, please provide Part Number, Quantity, Destination, Required Date and Machine/System Model.
Looking for Siemens 6ES7315-2EH14-0AB0 PDF, manual or datasheet information? Contact AMIKON for industrial sourcing assistance.
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