Complete 4.0 feature set: setters, array helpers, block transfer, CPU state#693
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gijzelaerr merged 2 commits intomasterfrom Apr 15, 2026
Merged
Complete 4.0 feature set: setters, array helpers, block transfer, CPU state#693gijzelaerr merged 2 commits intomasterfrom
gijzelaerr merged 2 commits intomasterfrom
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Missing data type setters: - set_lint, set_ulint: 64-bit signed/unsigned integer - set_ltime: nanosecond timedelta (LTIME) - set_ltod: nanosecond time-of-day (LTOD) - set_ldt: nanosecond epoch datetime (LDT) - All exported from snap7.util and registered in SymbolTable dispatch Optimized SymbolTable.read_many(): - Now uses read_multi_vars for batched reads (via optimizer when enabled) instead of reading each tag individually - Falls back to single read for single-tag requests Array read/write helpers: - db_read_array(db, start, count, fmt): read N values using struct format - db_write_array(db, start, values, fmt): pack and write N values - Supports any struct format (REAL, INT, DINT, etc.) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
S7CommPlus operations (experimental): - get_cpu_state(): read CPU state via EXPLORE on CPU exec unit object - upload_block(block_type, block_number): read program block via GET_VAR_SUBSTREAMED, with legacy full_upload fallback - download_block(block_type, block_number, data): write program block via SET_VAR_SUBSTREAMED, with legacy download fallback All exposed through s7.Client with S7CommPlus/legacy fallback. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
Fills the remaining feature gaps for 4.0 completeness.
Missing data type setters:
set_lint,set_ulint,set_ltime,set_ltod,set_ldtsnap7.util, registered in SymbolTable dispatch maps_TYPE_SIZEOptimized
SymbolTable.read_many():read_multi_vars(using the optimizer when enabled) instead of reading one tag at a timeArray read/write helpers:
db_read_array(db, start, count, fmt)— read N values with struct formatdb_write_array(db, start, values, fmt)— pack and write N valuesclient.db_read_array(1, 0, 20, ">f")reads 20 REALsS7CommPlus operations (experimental):
get_cpu_state()— via EXPLORE on CPU exec unitupload_block(block_type, block_number)— via GET_VAR_SUBSTREAMED, legacy fallbackdownload_block(block_type, block_number, data)— via SET_VAR_SUBSTREAMED, legacy fallbackTest plan
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