{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7516-3AN00-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7516-3AN00-0AB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7516-3AN00-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7516-3AN00-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens S7-1500 CPU 1516-3 PN/DP, 6ES7516-3AN00-0AB0, mid-range controller with integrated I/O, MRP redundancy, and web server.","salesMarkdown":"The Siemens 6ES7516-3AN00-0AB0 is a CPU of the S7-1500 generation designed for mid-range control tasks. It includes one onboard I/O module (integrated, 1) and supports MRP as a redundancy manager for rings of up to 50 devices. MRP redundancy manager capability means this CPU can build failover media rings without a separate switch, handling up to 50 participants. IRT is supported for deterministic motion and high-speed I/O. DCP (Discovery and Configuration Protocol) enables automatic address assignment and topology detection over PROFINET, reducing commissioning wiring checks. The I²t rating of 0.02 A²·s is the internal power supply's short-circuit energy withstand — relevant for power budget and protection coordination calculations. Process image for inputs and outputs is 32 kbyte each, setting the cyclic data volume the CPU exchanges with distributed I/O each bus cycle. The web server supports standard and user-defined HTTP/HTTPS pages. Programming languages include LAD, FBD, STL, SCL, and GRAPH; motion control is via integrated technology objects. Width 70 mm, height 147 mm, depth 129 mm. Up to 8 CM/CP modules can be inserted side-by-side. A dedicated MAINT LED is present for preventive maintenance indication; the ERROR LED signals bus faults or runtime errors. Communication interfaces: PROFINET (IRT, MRP), PROFIBUS via DP port, RS485, MODBUS TCP, and UDP. The CPU itself does not support DHCP; address configuration uses fixed IP or DCP. S7 routing is supported, which allows access to remote CPUs through the PROFINET backbone without extra gateways. Size of the retentive memory is 16 kbyte, suitable for storing recipe or alarm data across power cycles. The built-in PID controller with integrated optimization handles temperature and valve loops without an external module.","metaTitle":"6ES7516-3AN00-0AB0 Siemens S7-1500 CPU, MRP Manager","metaDescription":"S7-1500 CPU with MRP redundancy manager, IRT, MODBUS TCP, and web server. Integrated I/O, 32 kB I/O memory. 70 mm wide. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLCs (Programmable Logic Controllers)"],"specifications":{"DCP":"Yes","FBD":"Yes","I2t":"0.02 A²·s","IRT":"Yes","LAD":"Yes","MRP":"Yes; as MRP redundancy manager and/or MRP client; max. number of devices in the ring: 50","SCL":"Yes","STL":"Yes","UDP":"Yes","DHCP":"No","HTTP":"Yes; Standard and user-defined pages","LLDP":"Yes","SNMP":"Yes","Type":"Hardware clock","Depth":"129 mm","GRAPH":"Yes","HTTPS":"Yes; Standard and user-defined pages","Width":"70 mm","title":"6ES7516-3AN00-0AB0","Height":"147 mm","Inputs":"32 kbyte; All inputs are in the process image","MODBUS":"Yes; MODBUS TCP","Number":"16","RS 485":"Yes","TCP/IP":"Yes","Via CM":"8; A maximum of 8 CMs/CPs (PROFIBUS, PROFINET, Ethernet) can be inserted in total","Outputs":"32 kbyte; All outputs are in the process image","Present":"Yes","100 Mbps":"Yes","PID-Temp":"Yes; PID controller with integrated optimization for temperature","ERROR LED":"Yes","MAINT LED":"Yes","PID_3Step":"Yes; PID controller with integrated optimization for valves","PROFIsafe":"No","Supported":"Yes","Variables":"Inputs/outputs, memory bits, DBs, distributed I/Os, timers, counters","Adjustable":"Yes","Integrated":"1","S7 routing":"Yes","Size, max.":"16 kbyte","Web server":"Yes","Backup time":"6 wk; At 40 °C ambient temperature, typically","Lower Limit":"adjustable minimum cycle time","PID_Compact":"Yes; Universal PID controller with integrated optimization","PROFIenergy":"Yes","Single step":"No","Upper Limit":"adjustable maximum cycle time","Via Dataset":"Yes","description":"***Spare part*** SIMATIC S7-1500, CPU 1516-3 PN/DP, Central processing unit with Work memory 1 MB for program and 5 MB for data, 1st interface, PROFINET IRT with 2-port switch, 2nd interface, Ethernet, 3rd interface, PROFIBUS, 10 ns bit performance, SIMATIC Memory Card required","Autocrossing":"Yes","Equidistance":"Yes","Number range":"0 ... 65 535","RUN/STOP LED":"Yes","Status block":"Yes; Up to 8 simultaneously (in total across all ES clients)","in AS, slave":"Yes","Shared device":"Yes","in AS, master":"Yes","to DP, master":"Yes","Motion Control":"Yes","Number of keys":"6","Program alarms":"Yes","Updating times":"The minimum value of the update time also depends on communication share set for PROFINET IO, on the number of IO devices, and on the quantity of configured user data","Autonegotiation":"Yes","Copy protection":"Yes","Inputs (volume)":"8 kbyte","Number of ports":"1","Weight, approx.":"845 g","lifecycle_stage":"current","Block protection":"Yes","Firmware version":"V1.8","Isochronous mode":"Yes","Maintenance-Free":"Yes","Media redundancy":"Yes","Outputs (volume)":"8 kbyte","Power loss, typ.":"7 W","RJ 45 (Ethernet)":"Yes; X2","Rated value (DC)":"24 V","Data length, max.":"1 472 byte","Integrated Switch":"No","Number of PtP CMs":"the number of connectable PtP CMs is only limited by the number of available slots","PROFIBUS DP slave":"No","Forcing, variables":"Peripheral inputs/outputs","High-speed counter":"Yes","PROFIBUS DP master":"Yes","PROFINET IO Device":"No","Per Priority Class":"24","Retentivity preset":"No","Data record routing":"Yes","PG/OP communication":"Yes","Prioritized startup":"Yes; Max. 32 PROFINET devices","on Ethernet via NTP":"Yes","HW functional status":"FS05","ISO-on-TCP (RFC1006)":"Yes","Inrush current, max.":"2.4 A; Rated value","Mode selector switch":"1","Number of IO modules":"8 192; max. number of modules / submodules","Number of axes, max.":"15; Requirement: There must be no other motion technology objects created; note: The number of axes affects the cycle time of the PLC program; selection guide via the TIA Selection Tool","Password for display":"Yes","Screen diagonal [cm]":"6.1 cm","Integrated (For Data)":"5 Mbyte","Number of lines, max.":"1","Number of startup OBs":"100","Open IE communication":"Yes","SIMATIC communication":"Yes","For Send Cycle Of 1 Ms":"1 ms to 512 ms","For Send Cycle Of 2 Ms":"2 ms to 512 ms","For Send Cycle Of 4 Ms":"4 ms to 512 ms","Modules per rack, max.":"32; CPU + 31 modules","Of Which In Line, Max.":"256","PROFINET IO Controller":"No","Retentivity adjustable":"Yes","Deviation per day, max.":"10 s; Typ.: 2 s","Number of entries, max.":"3 200","Status/control variable":"Yes","Transmission rate, max.":"12 Mbit/s","User data per job, max.":"See online help (S7 communication, user data size)","For Bit Operations, Typ.":"10 ns","Integrated (For Program)":"1 Mbyte","Number of DPV1 alarm OBs":"3","Number of clock memories":"8; 8 clock memory bit, grouped into one clock memory byte","Number of free cycle OBs":"100","Number of program alarms":"600","Number of time alarm OBs":"20","Of Which Powerfail-Proof":"500","Per Priority Class, Max.":"64 kbyte; max. 16 KB per block","For Send Cycle Of 250 μS":"250 µs to 128 ms","For Send Cycle Of 500 μS":"500 µs to 256 ms","For Word Operations, Typ.":"12 ns","Number of DP slaves, max.":"125; In total, up to 768 distributed I/O devices can be connected via PROFIBUS or PROFINET","Number of delay alarm OBs":"20","Number of variables, max.":"200","Number of S7 routing paths":"16","Number of elements (total)":"6 000; Blocks (OB, FB, FC, DB) and UDTs","Number of connections, max.":"256; via integrated interfaces of the CPU and connected CPs / CMs","Number of process alarm OBs":"50","Reverse polarity protection":"Yes","S7 communication, as client":"Yes","S7 communication, as server":"Yes","Vertical Installation, Max.":"40 °C; Display: 40 °C, at an operating temperature of typically 40 °C, the display is switched off","Vertical Installation, Min.":"0 °C","SIMATIC memory card required":"Yes","Connection display LINK TX/RX":"Yes","Horizontal Installation, Max.":"60 °C; Display: 50 °C, at an operating temperature of typically 50 °C, the display is switched off","Horizontal Installation, Min.":"0 °C","Number of PROFIBUS interfaces":"1","Number of PROFINET interfaces":"2","Number of configurable Traces":"4; Up to 512 KB of data per trace are possible","Industrial Ethernet status LED":"Yes","Number of cyclic interrupt OBs":"20","Number of diagnostic alarm OBs":"1","Number of isochronous mode OBs":"2","Number of synchronous error OBs":"2","Of Which Status Variables, Max.":"200; per job","For Fixed Point Arithmetic, Typ.":"16 ns","Number of asynchronous error OBs":"4","Number of distributed IO systems":"20","Number of positioning axes, max.":"30; Requirement: There must be no other motion technology objects created; note: The number of axes affects the cycle time of the PLC program; selection guide via the TIA Selection Tool","Of Which Control Variables, Max.":"200; per job","Current consumption (rated value)":"0.85 A","Infeed power to the backplane bus":"12 W","Number of external encoders, max.":"30; Requirement: There must be no other motion technology objects created; note: The number of axes affects the cycle time of the PLC program; selection guide via the TIA Selection Tool","Number of subprocess images, max.":"32","Of which IO devices with IRT, max.":"64","Protection level: Write protection":"Yes","For Floating Point Arithmetic, Typ.":"64 ns","Joint commission (Team Engineering)":"Yes; Parallel online access possible for up to 8 engineering systems","Number of IO Devices per tool, max.":"8","Plug-in (SIMATIC Memory Card), max.":"32 Gbyte","Switchover time on line break, typ.":"200 ms","permissible range, lower limit (DC)":"19.2 V","permissible range, upper limit (DC)":"28.8 V","Activation/deactivation of DP slaves":"Yes","Number of stations in the ring, max.":"50","Number of speed-controlled axes, max.":"30; Requirement: There must be no other motion technology objects created; note: The number of axes affects the cycle time of the PLC program; selection guide via the TIA Selection Tool","Protection level: Complete protection":"Yes","Number of connectable IO Devices, max.":"256; In total, up to 768 distributed I/O devices can be connected via PROFIBUS or PROFINET","Number of alarms for system diagnostics":"200","Protection level: Read/write protection":"Yes","Mains/voltage failure stored energy time":"5 ms","Number of technology synchronous alarm OBs":"2","User program protection/password protection":"Yes","Number of configurable program messages, max.":"10 000","Number of connectable IO Devices for RT, max.":"256","Number of connections reserved for ES/HMI/web":"10","Number of alarms for motion technology objects":"160","Number of connections via integrated interfaces":"128","Several Passive Connections Per Port, Supported":"Yes","Number of IO Controllers with shared device, max.":"4","With IRT and parameterization of \"odd\" send cycles":"Update time = set \"odd\" send clock (any multiple of 125 µs: 375 µs, 625 µs ... 3 875 µs)","Power consumption from the backplane bus (balanced)":"6.7 W","Number of login stations for message functions, max.":"32","STEP 7 TIA Portal configurable/integrated from version":"V13 SP1 Update 4","Retentive data area (incl. timers, counters, flags), max.":"512 kbyte; In total; available retentive memory for bit memories, timers, counters, DBs, and technology data (axes): 472 KB","Number of IO Devices that can be simultaneously activated/deactivated, max.":"8"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ce9ac6d45726561f85da09d9c983a054.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=97138&mlfb=6ES7516-3AN00-0AB0"},"ai":{"faq":[{"question":"Does the 6ES7516-3AN00-0AB0 support DCP?","answer":"Yes, it supports Discovery and Configuration Protocol (DCP) for PROFINET address assignment and network discovery."},{"question":"Does this CPU support FBD programming?","answer":"Yes, Function Block Diagram (FBD) is listed as a supported programming language."},{"question":"What is the MRP capability of this CPU?","answer":"It can serve as an MRP redundancy manager and/or client, supporting rings of up to 50 devices."},{"question":"How much memory is available for the process image?","answer":"Inputs and outputs each have 32 kbyte in the process image."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7516-3AN00-0AB0","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/6ES7516-3AN00-0AB0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}