Palavras-chaves reservadas
    Você não pode usar palavras-chaves reservadas, como nomes de programas ou variáveis. Todas as palavras-chaves começando com um sublinhado (_) são palavras-chaves internas e não podem ser usadas em instruções textuais.
| Começa com | Descrição | 
|---|---|
| A | ABS, ABLACB, ACL, ACOS, ADD, AHLII, ANA, AND, AND_MASK, ANDN, ARDARL, ARRAY, ASCIILOCADDR, ASIN, AT, ATAN, AT_Param, AWAAWT | 
| B | BCD_TO_BOOL, BCD_TO_INT, BCD_TO_REAL, BCD_TO_STRING, BCD_TO_TIME, BLINK, BOO, BOOL, BOOL_TO_BCD, BOOL_TO_INT, BOOL_TO_REAL, BOOL_TO_STRING, BOOL_TO_TIME, BY, BYTE | 
| C | CAL, CALC, CALCN, CALN, CALNC, CASE, CONCAT, CONSTANT, COS | 
| D | DATE, DATE_AND_TIME, DELETE, DINT, DIV, DO, DOYDATA, DT, DWORD | 
| E | ELSE, ELSIF, EN, END_CASE, END_FOR, END_FUNCTION, END_IF, END_PROGRAM, END_REPEAT, END_RESSOURCE, END_STRUCT, END_TYPE, END_VAR, END_WHILE, ENO, EQ, EXIT, EXP, EXPT | 
| F | FALSE, FIND, FOR, FUNCTION | 
| G | GAIN_PID, GE, GFREEZE, GKILL, GRST, GSTART, GSTATUS, GT | 
| H | HSC0, HSC1, HSC2, HSC3, HSCAPP, HSCSTS | 
| I | IF, INSERT, INT, INT_TO_BCD, INT_TO_BOOL, INT_TO_REAL, INT_TO_STRING, INT_TO_TIME | 
| J | JMP, JMPC, JMPCN, JMPN, JMPNC | 
| L | LD, LDN, LE, LEFT, LEN, LIMIT, LINT, LN, LOG, LREAL, LT, LWORD | 
| M | MAX, MID, MIN, MMINFO, MMCATNUM, MOD, MODBUSLOCPARA, MODBUSTARPARA, MODBUSLOCADDR, MOVE, MSG, MUL, MUX | 
| N | NE, NOT | 
| O | OF, ON, OR, OR_MASK, ORN | 
| P | PROGRAM | 
| R | R, READ_ONLY, READ_WRITE, REAL, REAL_TO_BCD, REAL_TO_BOOL, REAL_TO_INT, REAL_TO_STRING, REAL_TO_TIME, REPEAT, REPLACE, RESSOURCE, RET, RETAIN, RETC, RETCN, RETN, RETNC, RETURN, RIGHT, ROL, ROR, RTC | 
| S | S, SHL, SHR, SIN, SINT, SQRT, ST, STN, STRING, STRING_TO_BCD, STRING_TO_BOOL, STRING_TO_INT, STRING_TO_REAL, STRING_TO_TIME, STRUCT, SUB, SUB_DATE_DATE, SYS_ERR_READ, SYS_ERR_TEST, SYS_INITALL, SYS_INITANA, SYS_INITBOO, SYS_INITTMR, SYS_RESTALL, SYS_RESTANA, SYS_RESTBOO, SYS_RESTTMR, SYS_SAVALL, SYS_SAVANA, SYS_SAVBOO, SYS_SAVTMR, SYS_TALLOWED, SYS_TCURRENT, SYS_TMAXIMUM, SYS_TOVERFLOW, SYS_TRESET, SYS_TWRITE, SYSINFO, SYSTEM | 
| T | TAN, TASK, THEN, TIME, TIME_OF_DAY, TIME_TO_BCD, TIME_TO_BOOL, TIME_TO_INT, TIME_TO_REAL, TIME_TO_STRING, TMR, TO, TOD, TOWDATA, TRUE, TYPE | 
| U | UDINT, UIC, UID, UIE, UIF, UINT, ULINT, UNTIL, USINT | 
| V | VAR, VAR_ACCESS, VAR_EXTERNAL, VAR_GLOBAL, VAR_IN_OUT, VAR_INPUT, VAR_OUTPUT | 
| W | WHILE, WITH, WORD | 
| X | XOR, XOR_MASK, XORN | 
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