{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7318-3EL00-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7318-3EL00-0AB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7318-3EL00-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7318-3EL00-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC S7-300 SFB CPU, FM 8, CFC, FBD, LAD, SCL, STL, GRAPH, HiGraph, 244 byte I/O, 120 x 125 x 130 mm, 6ES7318-3EL00-0AB0.","salesMarkdown":"## CPU Capabilities and Programming The Siemens 6ES7318-3EL00-0AB0 is a SIMATIC S7-300 SFB (Safety Fault-Proof) CPU with FM 8, supporting CFC, FBD, LAD, SCL, STL, GRAPH, and HiGraph programming languages. It provides 244 bytes each of process input and output image, with a total of 32 blocks overall. Integrated PROFINET interface enables UDP and TCP/IP communication via loadable function blocks. RS 485 is also present for serial links. No MPI or DPV1 support on this CPU. The CPU supports routing and can act as both PROFINET client and server. PROFIsafe is not supported, so this is not a safety-rated CPU for fail-safe applications. ## Physical Dimensions and Environment Dimensions are 120 mm wide, 125 mm high, and 130 mm deep. Operating temperature range is 0 °C to 60 °C. The I2t rating is 1.2 A²·s, relevant for short-circuit withstand coordination in the panel.","metaTitle":"Siemens 6ES7318-3EL00-0AB0 SFB CPU, FM 8, PROFINET, 120x125x","metaDescription":"Siemens 6ES7318-3EL00-0AB0 SFB CPU with FM 8, CFC, FBD, LAD, SCL, STL, GRAPH, HiGraph. Integrated PROFINET for UDP/TCP. 244 byte I/O. 120x125x130 mm. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLCs (Programmable Logic Controllers)"],"specifications":{"FM":"8","CFC":"Yes","FBD":"Yes","I2t":"1.2 A²·s","LAD":"Yes","MPI":"No","SCL":"Yes","STL":"Yes","UDP":"Yes; via integrated PROFINET interface and loadable FBs","DPV1":"No","Max.":"60 °C","Min.":"0 °C","Type":"SFB","Depth":"130 mm","GRAPH":"Yes","Width":"120 mm","Height":"125 mm","Inputs":"244 byte","Number":"4","Preset":"10","RS 485":"Yes","STEP 7":"Yes; V5.4 SP4 or higher with HW update","TCP/IP":"Yes; via integrated PROFINET interface and loadable FBs","via CP":"4","CP, LAN":"10","CP, PtP":"8","Forcing":"Yes","Outputs":"244 byte","Overall":"32","Present":"Yes","Routing":"Yes","GSD file":"The latest GSD file is available at: http://www.siemens.com/profibus-gsd","Isolated":"Yes","As Client":"Yes; via integrated PROFINET interface and loadable FB or via CP and loadable FB","As Server":"Yes","HiGraph®":"Yes","PROFIsafe":"No","Retentive":"Yes; Must be restarted at each restart","Supported":"Yes; via CP and loadable FC","Variables":"Inputs, outputs, memory bits, DB, times, counters","Adjustable":"Yes; From 10 to 499","Expandable":"No","Integrated":"2","Size, max.":"8 192 byte","Web server":"Yes; only read function","Backup time":"6 wk; At 40 °C ambient temperature","Command set":"see instruction list","Granularity":"1 h","Lower Limit":"10 ms","Racks, max.":"4","SYNC/FREEZE":"Yes","Send cycles":"250 µs, 500 µs, 1 ms","Single step":"Yes","Upper Limit":"9 990 s","Autocrossing":"Yes","Equidistance":"Yes","Inputs, max.":"8 kbyte","Number, max.":"4 096; Number range: 0 to 7999","PROFINET CBA":"Yes","Status block":"Yes; Up to 2 simultaneously","in AS, slave":"Yes","to DP, slave":"Yes","Outputs, max.":"8 kbyte","Plug-in (MMC)":"Yes","Updating time":"250 µs - 128 ms (with send cycle of 250 µs); 500 µs - 256 ms (with send cycle of 500 µs); 1 ms - 512 ms (with send cycle 1 ms); minimum value of the send cycle is also dependent on the set communication share for PROFINET IO, on the number of I/O devices, and on the volume of configured user data.","in AS, master":"Yes","to DP, master":"Yes; With DP slave only slave clock","to MPI, slave":"Yes","Interface type":"PROFINET","Nesting levels":"8","to MPI, master":"Yes","Autonegotiation":"Yes","Can Be Read Out":"Yes","Inputs, default":"256 byte","Number of ports":"1","Range of values":"0 to 2^31 hours (when using SFC 101)","Weight, approx.":"1 250 g","Without Battery":"Yes; Program and data","lifecycle_stage":"eol_hot","Firmware version":"V2.8","Isochronous mode":"No","Of Which Central":"256","Outputs, default":"256 byte","Power loss, typ.":"14 W","RJ 45 (Ethernet)":"Yes","Rated value (DC)":"24 V","S7 communication":"Yes; with loadable FBs, max. configurable connections: 16, max. number of instances: 32","Data length, max.":"1 472 byte","Integrated Switch":"No","PROFIBUS DP slave":"No","Address area, max.":"32","Forcing, variables":"Inputs, outputs","Inputs, adjustable":"8 192 byte","PROFIBUS DP master":"No","PROFINET IO Device":"No","Per Priority Class":"16","Retentivity preset":"Yes","Cyclic Transmission":"Yes","Data record routing":"Yes","Number/Number range":"0 to 3","Outputs, adjustable":"8 192 byte","PG/OP communication":"Yes","Plug-in (MMC), max.":"8 Mbyte","Prioritized startup":"Yes","Programming package":"STEP 7 V5.4 + SP5 or higher or STEP 7 V5.4 + SP4 or higher with HSP 186","on Ethernet via NTP":"Yes; As client","Acyclic Transmission":"Yes","HW functional status":"09","ISO-on-TCP (RFC1006)":"Yes; via integrated PROFINET interface and loadable FBs","Inrush current, typ.":"4 A","Number of breakpoints":"4","Number of connections":"32","Number of startup OBs":"1; OB 100","Open IE communication":"Yes; Via TCP/IP, ISO on TCP, and UDP","Retentivity available":"Yes; From MB 0 to MB 8 191","Modules per rack, max.":"8","Number of HTTP clients":"5","Of Which In Line, Max.":"256","PROFINET IO Controller":"Yes","Retentivity adjustable":"Yes; via non-retain property on DB","S7 basic communication":"No","System functions (SFC)":"see instruction list","Deviation per day, max.":"10 s","Number of entries, max.":"500","Status/control variable":"Yes","Transmission rate, max.":"100 Mbit/s","User data per job, max.":"See online help of STEP 7 (shared parameters of the SFBs/FBs and of the SFCs/FCs of S7 Communication)","For Bit Operations, Typ.":"0.01 µs","Number of DPV1 alarm OBs":"3; OB 55, 56, 57","Number of GD loops, max.":"8","Number of blocks (total)":"4 096; (DBs, FCs, FBs); the maximum number of loadable blocks can be reduced by the MMC used.","Number of clock memories":"8; 1 memory byte","Number of free cycle OBs":"1; OB 1","Number of time alarm OBs":"1; OB 10","Of Which Powerfail-Proof":"100","Per Priority Class, Max.":"32 768 byte; Max. 2048 bytes per block","Size of GD packets, max.":"22 byte","integrated channels (AI)":"0","integrated channels (AO)":"0","integrated channels (DI)":"0","integrated channels (DO)":"0","For Word Operations, Typ.":"0.02 µs","Global data communication":"No","Number of DP slaves, max.":"124","Number of delay alarm OBs":"2; OB 20, 21","Number of variables, max.":"10","Point-to-point connection":"No","Automatic Baud Rate Search":"Yes; only with passive interface","Hardware clock (real-time)":"Yes","Number of GD packets, max.":"8","Number of RS 422 interfaces":"0","Number of RS 485 interfaces":"2","Number of connections, max.":"32","Number of process alarm OBs":"1; OB 40","Process diagnostic messages":"Yes","S7 communication, as client":"No","S7 communication, as server":"Yes; Connection configured on one side only","User data consistency, max.":"254 byte","usable for OP communication":"31","usable for PG communication":"31","usable for S7 communication":"16","Retentive And Synchronizable":"Yes","System function blocks (SFB)":"see instruction list","Number of PROFINET interfaces":"1","additional within an error OB":"4","reserved for OP communication":"1","reserved for PG communication":"1","reserved for S7 communication":"0","Number of cyclic interrupt OBs":"4; OB 32, 33, 34, 35 (OB 35: smallest settable clock pulse = 500 µs)","Number of isochronous mode OBs":"1; OB 61","Number of expansion units, max.":"3","Number of synchronous error OBs":"2; OB 121, 122","Of Which Status Variables, Max.":"30","Total Number Of Instances, Max.":"32","For Fixed Point Arithmetic, Typ.":"0.02 µs","Number of asynchronous error OBs":"6; OB 80, 82, 83, 85, 86, 87 (OB83 only for PROFINET IO)","Of Which Control Variables, Max.":"14","User data per address area, max.":"32 byte","Current consumption (rated value)":"1 050 mA","Number of subprocess images, max.":"1","usable for S7 basic communication":"30","For Floating Point Arithmetic, Typ.":"0.04 µs","Number of IO Devices per tool, max.":"8","permissible range, lower limit (DC)":"20.4 V","permissible range, upper limit (DC)":"28.8 V","reserved for S7 basic communication":"0","Activation/deactivation of DP slaves":"Yes","Number of GD packets, receiver, max.":"8","Activation/deactivation of IO Devices":"Yes","Output current of the interface, max.":"200 mA","adjustable for OP communication, max.":"31","adjustable for OP communication, min.":"1","adjustable for PG communication, max.":"31","adjustable for PG communication, min.":"1","adjustable for S7 communication, max.":"16","adjustable for S7 communication, min.":"0","Device replacement without swap medium":"Yes","Number of connectable IO Devices, max.":"256","Number of GD packets, transmitter, max.":"8","Setpoint for the CPU communication load":"20 %","Automatic Detection Of Transmission Rate":"Yes; 10/100 Mbit/s","Number of industrial Ethernet interfaces":"1","Data length for connection type 01H, max.":"1 460 byte","Data length for connection type 11H, max.":"8 192 byte","Local port numbers used at the system end":"0, 20, 21, 23, 25, 80, 102, 135, 161, 8080, 34962, 34963, 34964, 65532, 65533, 65534, 65535","simultaneously active Alarm-S blocks, max.":"300","User program protection/password protection":"Yes","adjustable for S7 basic communication, max.":"30","adjustable for S7 basic communication, min.":"0","Number of connectable IO Devices for RT, max.":"256","Size of GD packet (of which consistent), max.":"22 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)","Current consumption (in no-load operation), typ.":"400 mA","Direct data exchange (slave-to-slave communication)":"Yes","Number of IO devices with prioritized startup, max.":"32","Number of login stations for message functions, max.":"32; Depending on the configured connections for PG/OP and S7 basic communication","Data management on MMC (after last programming), min.":"10 a","Behavior of the clock following expiry of backup period":"the clock continues at the time of day it had when power was switched off","number of remote connection partners / with PROFINET CBA":"32","Retentive data area (incl. timers, counters, flags), max.":"700 kbyte","External Protection For Power Supply Lines (Recommendation)":"2 A min.","IO Devices changing during operation (partner ports), supported":"Yes","Number of IO Devices with IRT and the option \"high flexibility\"":"256","number of coupled PROFIBUS devices / with PROFIBUS functionality":"32","Number of DP slaves that can be simultaneously activated/deactivated, max.":"8","Number of IO Devices that can be simultaneously activated/deactivated, max.":"8"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3,317.88 – $5,134.00","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=317569&mlfb=6ES7318-3EL00-0AB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/6ES7318-3EL00-0AB0/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source — 6ES7317-2EK14-0AB0?","answer":"The 6ES7317-2EK14-0AB0 is a different CPU variant with different firmware and feature set. The 6ES7318-3EL00-0AB0 is an SFB CPU with FM 8, while the 6ES7317-2EK14-0AB0 is a standard CPU. They are not drop-in replacements; verify compatibility with your application before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7318-3EL00-0AB0","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/6ES7318-3EL00-0AB0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}