siemens-awl-stl-programmer

name siemens-awl-stl-programmer description Generate Siemens S7-300/S7-400/S7-1500 Statement List (STL/AWL) programs compatible with Step7 Classic and TIA Portal. Use this skill whenever the user asks to write, generate, create, or modify any PLC logic, function blocks, organization blocks, data blocks, or control programs in STL/AWL format. Also trigger for any questions about Siemens S7 memory addressing, timers, counters, accumulators, block structure, or Step7/TIA Portal imports. Always use this skill even if the user just mentions "STL", "AWL", "Step7", "TIA Portal", "S7-300", "S7-400", "S7-1500", "PLC block", "OB", "FB", "FC", or "DB". metadata {"version":"1.0"} Siemens S7 STL (AWL) Programming Skill Overview Generate Siemens S7-300 / S7-400 / S7-1500 Statement List (STL / AWL) programs compatible with Step7 Classic and TIA Portal . Core model knowledge: Accumulator-based execution (ACCU1 / ACCU2) RLO (Result of Logic Operation) for boolean logic S5 timers, IEC timers (TON/TOF/TP), counters, INT and REAL arithmetic OB / FB / FC / DB block hierarchy Standard scan cycle model (Read → Execute → Write) For full instruction syntax, see references/STL_Core_Instructions.md . Critical Rule: Omit Block Number ( NAME ) Line Always omit the NAME : '<number>' line unless the user specifically requests a fixed block number. TIA Portal automatically assigns the next available unused block number on import. Block Structure Organization Block (OB) ORGANIZATION_BLOCK "OB1" TITLE = Main Program Cycle { S7_Optimized_Access := 'TRUE' } VERSION : 0.1 VAR_TEMP TempVar : Int; END_VAR BEGIN NETWORK TITLE = Example Network L PIW256; T #TempVar; END_ORGANIZATION_BLOCK Function (FC) — Stateless FUNCTION "FC_Name" : Void { S7_Optimized_Access := 'TRUE' } VERSION : 0.1 VAR_INPUT IN : Int; END_VAR VAR_OUTPUT OUT : Real; END_VAR BEGIN NETWORK TITLE = Convert and Scale L #IN; ITD; DTR; T #OUT; END_FUNCTION Function Block (FB) — Stateful FUNCTION_BLOCK "FB_Name" { S7_Optimized_Access := 'TRUE' } VERSION : 0.1 VAR_INPUT StartPB : BOOL; StopPB : BOOL; END_VAR VAR_OUTPUT MotorOut : BOOL; END_VAR VAR RunLatch : BOOL; Delay : TON; END_VAR BEGIN NETWORK TITLE = Start Latch A #StartPB; AN #StopPB; S #RunLatch; NETWORK TITLE = Output A #RunLatch; = #MotorOut; END_FUNCTION_BLOCK Data Block (DB) DATA_BLOCK "DB_Name" { S7_Optimized_Access := 'TRUE' } VERSION : 0.1 NON_RETAIN VAR Value : Int; END_VAR BEGIN END_DATA_BLOCK Key Formatting Rules Always include { S7_Optimized_Access := 'TRUE' } after block keyword Use symbolic quoted names ( "BlockName" ) — never numeric references Prefix local variables with # (e.g., #StartPB ) Each instruction ends with ; Use NETWORK + TITLE = ... + // comment for each logical group Timer Selection: Inside FC: Use S5 timers ( SE , SP , SD , SA , SS ) Inside FB: Use IEC timers ( TON , TOF , TP ) Code Generation Constraints MUST: Use symbolic quoted names for all block references Generate complete, compilable blocks Separate logical groups into individual NETWORKs Use uppercase STL mnemonics (A, AN, O, =, S, R, L, T, FP, ITD, DTR, etc.) Generate matching instance DB when generating an FB MUST NOT: Mix LAD, SCL, or non-STL syntax Use numeric-only block references unless user explicitly requests Include NAME : '<number>' in generated blocks When to Consult Documentation If the user's request involves instructions or patterns not covered here , consult: TIA Portal STL Reference: https://docs.tia.siemens.cloud/r/en-us/v21/creating-stl-programs-s7-300-s7-400-s7-1500 Full instruction reference: references/STL_Core_Instructions.md Block templates: references/REFERENCE.md Formatting rules: references/FORMATTING.md Typical cases requiring documentation lookup: Interrupt OBs (OB35, OB40, OB80) and their startup VAR_TEMP System function calls (SFC, SFB) such as CALL SFC14 String handling, DATE_AND_TIME types BLKMOV , FILL , UBLKMOV block move instructions Less common accumulator operations ( CAD , CAW , TAK , PUSH , POP )