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PRODUCT DESCRIPTION
6ES7518-4AX00-1AC0 combines PLC control with an MFP runtime bundle
Siemens 6ES7518-4AX00-1AC0 is a SIMATIC S7-1500 CPU 1518-4 PN/DP MFP bundle. Siemens identifies the included CPU as 6ES7518-4AX00-1AB0 and includes C/C++ Runtime and OPC UA Runtime licenses. The specified work memory is 6 MB for program and 60 MB for data, with 1 ns typical bit-operation time.
The four interfaces serve different roles: X1 is two-port PROFINET IRT, X2 is PROFINET RT, X3 provides Ethernet basic services and C/C++ Runtime access, and X4 is PROFIBUS DP. A SIMATIC Memory Card of at least 2 GB is required. Confirm the complete bundle scope, application backups and installed software versions before replacement.
The four interfaces serve different roles: X1 is two-port PROFINET IRT, X2 is PROFINET RT, X3 provides Ethernet basic services and C/C++ Runtime access, and X4 is PROFIBUS DP. A SIMATIC Memory Card of at least 2 GB is required. Confirm the complete bundle scope, application backups and installed software versions before replacement.
BEFORE YOU BUY
Verify hardware and software as one bundle
ACTUAL APPLICATIONS
Where 6ES7518-4AX00-1AC0 combines control and custom software
The Siemens MFP equipment manual describes these application approaches for the CPU included in the bundle. Select the development tools and runtime versions for the actual installed system.
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01 · ALGORITHM REUSE
Integrate established C/C++ algorithms into the control program
Use the documented CPU function-library approach to reuse suitable C/C++ code with the STEP 7 application. The MFP manual identifies ODK and Target 1500S workflows for engineered control functions; compile and validate the application for the target runtime. -
02 · PARALLEL DATA HANDLING
Pre-process machine data alongside the PLC task
The manual describes C/C++ Runtime applications operating independently of the STEP 7 user program, including data pre-processing and transmission through Industrial Ethernet. Assess resource use and storage access so that additional software does not compromise the control task. -
03 · MACHINE VARIANTS
Manage different equipment configurations within one project
Use configuration control to represent different real hardware arrangements through a maximum hardware configuration. This supports engineered expansion variants in series-machine construction, with each actual module arrangement and device assignment validated before operation.
Technical specifications for 6ES7518-4AX00-1AC0
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Product Model6ES7518-4AX00-1AC0
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Product ParametersMultifunctional CPU Runtime Bundle
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In stock1 unit
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ManufacturerSiemens
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Program work memory6 MB
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Data work memory60 MB
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Typical bit-operation time1 ns
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CPU function-library memory50 MB
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C/C++ Runtime application memory1024 MB
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SIMATIC Memory Card capacityRequired; minimum 2 GB, maximum 32 GB
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Interface allocationX1 IRT; X2 RT; X3 basic services/runtime; X4 DP
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Permissible DC supply19.2 to 28.8 V DC; rated 24 V DC
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Typical power loss29 W
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Maximum communication connections384 via CPU interfaces and connected CPs/CMs
View all additional
Alternative Names
6ES7518-4AX00-1AC0
CPU 1518-4 PN/DP MFP Bundle
SIMATIC S7-1500 MFP Controller Bundle
SYSTEM & REPLACEMENT CHECK
Information needed before ordering
Three direct checks to secure your system integration and minimize ordering risks.
Information
System integration
Replacement check
Manuals & support
SIMATIC S7-1500 MFP BUNDLE
Coordinate PLC execution and the C/C++ environment
Siemens 6ES7518-4AX00-1AC0 is a SIMATIC S7-1500 CPU 1518-4 PN/DP MFP bundle. Siemens identifies the included CPU as 6ES7518-4AX00-1AB0 and includes C/C++ Runtime and OPC UA Runtime licenses. The specified work memory is 6 MB for program and 60 MB for data, with 1 ns typical bit-operation time.
The four interfaces serve different roles: X1 is two-port PROFINET IRT, X2 is PROFINET RT, X3 provides Ethernet basic services and C/C++ Runtime access, and X4 is PROFIBUS DP. A SIMATIC Memory Card of at least 2 GB is required. Confirm the complete bundle scope, application backups and installed software versions before replacement.
The included 1AB0 CPU is covered by the MFP equipment manual. X3 is internally shared by CPU Runtime and C/C++ Runtime, which have separate IP addresses. Preserve both configurations and review current Siemens cybersecurity guidance for the installed runtime version.
Features:
- PLC work memory plus additional C/C++ resources
- Separate CPU and C/C++ Runtime IP settings
- Verify the complete licensed bundle scope
The Siemens 6ES7518-4AX00-1AC0 requires PLC configuration, runtime applications and license scope to be checked for reliable system integration and commissioning.
INTERCHANGEABILITY
Verify the complete replacement identity before commissioning
Record the 6ES7518-4AX00-1AC0 bundle identity and the included 1AB0 CPU. Secure the approved STEP 7 project, C/C++ application sources or deployment package, runtime configuration and the relevant license documentation before removing the installed unit.
Place the machine in a safe state, select STOP and isolate the supply. Follow the S7-1500 rail instructions and the MFP-specific X80 and X1-X4 connection diagrams. Preserve the Memory Card and backups; formatting or resetting the runtime can permanently remove application data.
Restore the approved PLC and runtime configurations, verify both X3 IP assignments and test the complete application. When changing firmware, follow the MFP manual and review whether recompilation is required. The current catalog shows PM300 and a future phase-out date of 1 November 2026; confirm supply scope in the quotation.
Features:
- Preserve both PLC and runtime application backups
- Check the bundle licenses and Memory Card capacity
- Validate the complete software and network restoration
The Siemens 6ES7518-4AX00-1AC0 CPU 1518-4 PN/DP MFP bundle requires replacement verification of the licensed bundle, PLC project and C/C++ applications before return to service.
DOCUMENTATION STATUS
Browse the Manuals, Datasheets, Official Documents, Links
Important Notice: Official documents are provided through manufacturer links. Accessories, manuals, cables, calibration data, software, certificates, and other items are not included with this equipment unless listed in the stock item description.
Features:
- Available Siemens document references are confirmed before order
- Software licensing and project backups remain the customer's responsibility
- Accessories are supplied only when listed in the quotation
Documentation for the Siemens 6ES7518-4AX00-1AC0 The 1AC0 bundle contains the 1AB0 CPU covered by the MFP equipment-manual extracts; confirm manual availability in the written quotation.
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Important notice
Manuals, software, firmware, cables, calibration data and accessories are included only when listed in the quotation. AMIKON is an independent supplier and is not affiliated with or authorised by the manufacturer.
This content has been produced using multiple sources. Takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
BUYER INFORMATION
Commercial terms without hidden steps
Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
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Shipping & delivery
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DispatchEligible stock: same / next day
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CarriersDHL, FedEx or UPS
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Ship fromXiamen, China
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Packed size20.4 × 22.2 × 16.1 cm
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Shipping weightApprox. 2.09 kg
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Payment & customs
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PaymentBank transfer (T/T)
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CurrenciesUSD · EUR · GBP · RMB
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Credit cardsNot accepted
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HS reference8537101190
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OriginGermany
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Warranty & returns
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Warranty12 months from AMIKON
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InspectionLabel, condition and packing checks
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ReturnsPrior RMA authorisation required
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CompatibilityConfirm before order
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OEM warrantyDoes not apply
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Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
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Part checked
Full suffix recorded -
Condition checked
Label and appearance -
Packing checked
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Tracking supplied
Established couriers -
Sandy Lin
Dedicated account manager · 15+ years
FREQUENTLY ASKED QUESTIONS
Questions buyers ask about 6ES7518-4AX00-1AC0
Direct answers about identity, compatibility, stock, warranty, payment and shipping.
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Why does the 1AC0 bundle documentation also identify a 1AB0 CPU?
Siemens defines 6ES7518-4AX00-1AC0 as a bundle containing CPU 6ES7518-4AX00-1AB0 together with C/C++ Runtime and OPC UA Runtime licenses. For purchasing, confirm the complete bundle scope instead of treating the hardware article alone as proof that the licensed bundle is supplied. -
Can a 512 MB SIMATIC Memory Card be used for this MFP bundle?
No. The exact bundle datasheet requires a SIMATIC Memory Card with at least 2 GB capacity and lists a maximum of 32 GB. Check the approved card and application-storage requirement before dispatching a spare. -
Does the 50 MB CPU function-library area replace the separate C/C++ Runtime memory?
No. Siemens lists 50 MB for the CPU function library, 1024 MB for C/C++ Runtime applications and 1 GB available for Linux runtime applications. These are separately described resources and must not be added to the 6 MB PLC program-memory figure as one interchangeable pool. -
Why are two IP addresses associated with the X3 runtime connection?
The MFP manual explains that X3 is split internally between CPU Runtime and C/C++ Runtime. The CPU address is configured in STEP 7, while the C/C++ Runtime address is configured in its own environment. Record and restore both assignments during commissioning. -
What size limit applies to an ODK shared-object file?
The exact bundle datasheet gives a maximum ODK SO file size of 9.8 MB. Check the compiled deployment file against this limit rather than comparing it only with the overall runtime RAM or Memory Card capacity. -
Must a C/C++ application be rebuilt when moving to firmware V3.1.5?
The September 2025 MFP equipment manual states that user applications must be recompiled with the SDK after an update to V3.1.5. Back up the runtime containers and follow the documented migration process; do not assume an existing binary remains compatible. -
Is a flashing STOP LED on the first start with an empty card always a fault?
Not necessarily. The MFP manual states that preparing an empty SIMATIC Memory Card for C/C++ Runtime can take up to three minutes, during which the STOP LED flashes. Do not interrupt power during this preparation; investigate diagnostics if the documented startup does not complete. -
Why can a copied project fail to run after replacing the Memory Card?
Copy-protected blocks can be tied to the serial number of a specified Memory Card or CPU. Check the authorized project and protection settings with the responsible engineer; obtain the correct approved deployment instead of assuming that copying files transfers the required binding.
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