{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7315-2AH14-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7315-2AH14-0AB0","canonicalUrl":"https://aoctrl.com/siemens/6ES7315-2AH14-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7315-2AH14-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens S7-300 CPU 315-2 DP, order code 6ES7315-2AH14-0AB0, FM 8, CFC, FBD, LAD, SCL, STL, GRAPH, 244-byte I/O, PROFIBUS RS-485.","salesMarkdown":"## CPU 315-2 DP with FM 8 and full IEC programming The 6ES7315-2AH14-0AB0 is an S7-300 CPU with FM rating of 8. It supports CFC, FBD, LAD, SCL, STL, HiGraph, and GRAPH. The backplane I²t is rated at 1 A²·s. Input and output addressing each reach 244 bytes, with a maximum of 16 modules overall. The CPU communicates via PROFIBUS DP over an isolated RS-485 interface. Physical dimensions are 40 mm wide, 125 mm high, 130 mm deep. It requires STEP 7 V5.2 SP1 or higher with a hardware update. The unit supports forcing, retentive data (must be restarted at each restart), and routing only with an active interface. Up to 4 CPs, 10 CP LAN connections, and 8 PtP CPs can be configured. The closest sibling in the same S7-300 footprint is the 6ES7315-2EH13-0AB0, which adds a PROFINET interface and enables MPI. This CPU (2AH14) lacks MPI and uses only PROFIBUS DP.","metaTitle":"6ES7315-2AH14-0AB0 Siemens CPU315-2 DP, FM 8","metaDescription":"Siemens 6ES7315-2AH14-0AB0 CPU 315-2 DP for S7-300. Supports FM 8, CFC, FBD, LAD. 244-byte I/O, PROFIBUS DP. 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 A²·s","LAD":"Yes","MPI":"No","SCL":"Yes","STL":"Yes","DPV1":"No","Max.":"60 °C","Min.":"0 °C","Type":"SFB","Depth":"130 mm","GRAPH":"Yes","Width":"40 mm","title":"6ES7315-2AH14-0AB0","Height":"125 mm","Inputs":"244 byte","Number":"1","Preset":"10","RS 485":"Yes","STEP 7":"Yes; V5.2 SP1 or higher with HW update","via CP":"4","CP, LAN":"10","CP, PtP":"8","Forcing":"Yes","Outputs":"244 byte","Overall":"16","Present":"Yes","Routing":"Yes; Only with active interface","GSD file":"The latest GSD file is available at: http://www.siemens.com/profibus-gsd","Isolated":"Yes","As Client":"Yes; 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":"1","Size, max.":"2 048 byte","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","Single step":"Yes","Upper Limit":"9 990 s","description":"SIMATIC S7-300, CPU 315-2DP Central processing unit with MPI Integr. power supply 24 V DC Work memory 256 KB 2nd interface DP master/slave Micro Memory Card required","Equidistance":"Yes","Inputs, max.":"244 byte","Number, max.":"see instruction list","Status block":"Yes; Up to 2 simultaneously","in AS, slave":"No","to DP, slave":"Yes","Outputs, max.":"244 byte","Plug-in (MMC)":"Yes","in AS, master":"Yes","to DP, master":"Yes; With DP slave only slave clock","to MPI, slave":"Yes","Interface type":"Integrated RS 485 interface","Nesting levels":"8","to MPI, master":"Yes","Can Be Read Out":"Yes","Inputs, default":"128 byte","Range of values":"0 to 2^31 hours (when using SFC 101)","Weight, approx.":"290 g","Without Battery":"Yes; Program and data","lifecycle_stage":"eol_hot","Block encryption":"Yes; With S7 block Privacy","Firmware version":"V3.3","Isochronous mode":"Yes; OB 61","Of Which Central":"256","Outputs, default":"128 byte","Power loss, typ.":"4.5 W","Rated value (DC)":"24 V","S7 communication":"Yes; Only server, configured on one side","PROFIBUS DP slave":"Yes","Repeat rate, min.":"1 s","Address area, max.":"32","Forcing, variables":"Inputs, outputs","Inputs, adjustable":"2 048 byte","PROFIBUS DP master":"Yes","Per Priority Class":"16","Retentivity preset":"Yes","Data record routing":"Yes","Number/Number range":"0","Outputs, adjustable":"2 048 byte","PG/OP communication":"Yes","Plug-in (MMC), max.":"8 Mbyte","Programming package":"STEP 7 V5.5 + SP1 or higher or STEP 7 V5.2 + SP1 or higher with HSP 218","HW functional status":"01","Inrush current, typ.":"3.5 A","Number of breakpoints":"4","Number of startup OBs":"1; OB 100","Retentivity available":"Yes; MB 0 to MB 2 047","Modules per rack, max.":"8","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; Typ.: 2 s","Number of analog inputs":"0","Number of entries, max.":"500","Status/control variable":"Yes","Transmission rate, max.":"12 Mbit/s","User data per job, max.":"180 byte; With PUT/GET","For Bit Operations, Typ.":"0.05 µs","Number of DPV1 alarm OBs":"3; OB 55, 56, 57","Number of GD loops, max.":"8","Number of analog outputs":"0","Number of blocks (total)":"1 024; (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 digital inputs":"0","Number of free cycle OBs":"1; OB 1","Number of time alarm OBs":"1; OB 10","Of Which Powerfail-Proof":"100; Only the last 100 entries are retained","Per Priority Class, Max.":"32 kbyte; Max. 2 KB per block","Size of GD packets, max.":"22 byte","For Word Operations, Typ.":"0.09 µs","Global data communication":"No","Number of DP slaves, max.":"124; Per station","Number of delay alarm OBs":"2; OB 20, 21","Number of digital outputs":"0","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; MPI and PROFIBUS DP","Number of process alarm OBs":"1; OB 40","Process diagnostic messages":"Yes","S7 communication, as client":"No","S7 communication, as server":"Yes","usable for OP communication":"15","usable for PG communication":"15","Retentive And Synchronizable":"Yes","System function blocks (SFB)":"see instruction list","Number of PROFINET interfaces":"0","additional within an error OB":"4","reserved for OP communication":"1","reserved for PG communication":"1","Number of cyclic interrupt OBs":"4; OB 32, 33, 34, 35","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","For Fixed Point Arithmetic, Typ.":"0.12 µs","Number of asynchronous error OBs":"5; OB 80, 82, 85, 86, 87","Of Which Control Variables, Max.":"14","User data per address area, max.":"32 byte","Current consumption (rated value)":"850 mA","Number of subprocess images, max.":"1","usable for S7 basic communication":"12","For Floating Point Arithmetic, Typ.":"0.45 µs","permissible range, lower limit (DC)":"19.2 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","Output current of the interface, max.":"200 mA","adjustable for OP communication, max.":"15","adjustable for OP communication, min.":"1","adjustable for PG communication, max.":"15","adjustable for PG communication, min.":"1","Number of GD packets, transmitter, max.":"8","Behavior of the clock following POWER-ON":"Clock continues running after POWER OFF","Mains/voltage failure stored energy time":"5 ms","Number of industrial Ethernet interfaces":"0","simultaneously active Alarm-S blocks, max.":"300","User program protection/password protection":"Yes","adjustable for S7 basic communication, max.":"12","adjustable for S7 basic communication, min.":"0","Size of GD packet (of which consistent), max.":"22 byte","User data per job (of which consistent), max.":"240 byte; as server","Current consumption (in no-load operation), typ.":"150 mA","Direct data exchange (slave-to-slave communication)":"Yes","Number of login stations for message functions, max.":"16; 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","Retentive data area (incl. timers, counters, flags), max.":"128 kbyte","External Protection For Power Supply Lines (Recommendation)":"2 A min.","Number of DP slaves that can be simultaneously activated/deactivated, max.":"8"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$895.00 – $1,200.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/cf92d7b13e1ea59bdcf2a21cc3c71f6e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=155410&mlfb=6ES7315-2AH14-0AB0"},"ai":{"faq":[{"question":"Will the 6ES7315-2AH14-0AB0 drop into a panel that was specified around the 6ES7315-2EH13-0AB0 without rewiring?","answer":"No. The 2EH13 has PROFINET and MPI; the 2AH14 has only PROFIBUS DP and no MPI. The physical footprint matches, but the network connection requires rewiring and the hardware configuration must be updated. The backplane and power draw are compatible, but the communication driver differs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7315-2AH14-0AB0","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/6ES7315-2AH14-0AB0 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}}