Files in IEC 61131-3 editor

The following files can be created with IEC 61131-3 editor:

File Extension	Example	Description	Format	Path (Default)
*.pro	project01.pro	IEC 61131-3 editor project file	binary	project directory
*.ci	project01<number>.ci	Information on the last build (compilation) of the project -> incremental compile possible; only created when project gets saved number: coded Target-ID	binary	project directory
*.eci	project01<number>.eci	external Compile-Information; Subset of the ci-file in eci-format; can be read via an access-dll number: coded Target-ID	PE	project directory
*.cic	project01<number>.cic	target-dependant information on the last  build (compilation) of the project -> incremental compile possible; only created when project gets saved number: coded Target-ID	binary	project directory
*.cit	project01<number>.cit	temporary *.ci-file; created at target change, transformed to a ci-file at next save of the project number: coded Target-ID	binary	project directory
*.ri	project01<number>.ri	information on the last download, important for Online Change; created at each download number: coded Target-ID	binary	project directory
*.exp	project01.exp, PLC_PRG.exp	export file (‘Project’ ‘Export’)	Export format (Text)	project directory
*.tlt *.txt	project01.tlt project01.txt	translation file (defined in ‘Project’ ‘Translate in another language’)	Text
*.sym	project01.sym	symbol file	Text	project directory
*.sdb	project01.sdb	symbol file	binary	project directory
*.sym_xml	project01.sym_xml	symbol file	XML	project directory
*.asd	project01.asd	save file (temporary, ‘Auto save’, ‘Auto save before compile’)	binary	project directory
*.asl	lib01.asl	save file for a library opened as project in IEC 61131-3 editor (temporary, ‘Auto save’, ‘Auto save before compile’)	binary	library resp. project directory
*.bak	project01.bak	backup file for project (permanent, ‘Create backup’)	binary	project directory
*.prg *.bin	default.prg project01.prg	boot project, file name depending on target	binary	target system (created online) project directory (created offline)
*.chk	default.chk project01.chk	checksum for boot projekt code	binary	target system (created online) project directory (created offline)
*.ini	codesys.ini	ini-file for various IEC 61131-3 editor settings	Text	with codesys.exe
*.dfr	default.dfr project01.dfr	frame file (Printer setup)	binary	with codesys.exe
*.asm	code386.asm	assembler-Listing of the created project code	Text	compile directory
*.lst	project01.lst	assembler-Listing of the created project code	Text	compile directory
*.bpl	project01.bpl	debug-files (breakpoint-information)	Text	compile directory
*.st	PLC_PRG.st	debug-files, implicit ST-code	Text	compile directory
*.map	project01.map	map-file; information on memory organization and variable locations	Text	compile directory
*.hex *.h86	project01.hex (Output) resp. standard.hex (Lib)	.hex for Intel or Motorola, .h86 for Intel; compiler output or input for external library	Intel or Motorola hex-files	compile directory resp. library directory
*.trd	projectxy0.trd	trend logging (number befor the dot is counted up, if file is full and another must be created)	Text	project directory
*.log	projectxy.log	log file (Log)	binary	project directory
*.wtc	projx_watch1.wtc	watch list (Watch- and Recipe-Manager)	Text	user defined directory
*.alm	alarmlog0.alm	alarm log-file		user defined directory resp. download-directory of the controller
*.zip	projectxy.zip	project archive file; zip-file with files belonging to the project , ‘File’ ‘Save/Mail Archive’		user defined directory
*.trc	project01_tr1.trc	trace recording	binary	with codesys.exe
*.mon	project01_tr1.mon	trace recording	XML	with codesys.exe
*.tcf	project01_tr1.tcf	trace configuration	binary	with codesys.exe