NiLAB uPLC - ST to IL Converter

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Instruction List destination in orange

ST Syntax Reference

VAR Block (typed)

VAR
  name : BOOL;
  name : INT := 0;
  name : TON;
  name : R_TRIG;
END_VAR

BOOL -> R8681/R8682 (max 32)

INT -> R8683..R8688 (max 6)

TON -> R8028/R8029 (max 2)

Constants R8675-R8680: read-only!

Function Blocks

T1(IN:=bit, PT:=100);
C1(CU:=bit, PV:=5);
E1(CLK:=bit); R_TRIG
F1(CLK:=bit); F_TRIG
Use E1.Q in IF conditions

VAR_ALIAS

VAR_ALIAS
Name := R####.N; (bit)
Name := R####; (register)
END_VAR_ALIAS

Place before any program statements.

IF / ELSE / END_IF

IF cond THEN
statements;
ELSE (optional)
statements;
END_IF;

Operators: AND OR NOT

OK: A AND B AND C

OK: A OR B OR C

NO: A AND B OR C (mixed)

Bit Statements

SET(R####.N);
RESET(R####.N);
R####.N := 1; (SET)
R####.N := 0; (RESET)

Bit index must be 0..15

Rc := Ra + Rb;
Rc := Ra - Rb;
Rc := Ra * Rb;
Rc := Ra / Rb;
Rb := Ra; (MOV)
CMP(Ra, Rb);

Destination shown in orange in IL.

Top-level: always executes.

Inside IF: conditional.

Constants (read-only)

R8675 = 0
R8676 = 1
R8678 = 10
R8679 = 100
R8680 = 1000

Cannot be write destination!

Literals 0,1,10,100,1000 auto-map.

Flags R8671

.0 Timer1 expired
.1 Timer2 expired
.2 LT (Pa < Pb after CMP)
.3 EQ (Pa = Pb)
.4 GT (Pa > Pb)

Key Registers

R4620 Digital inputs
R4621 Digital outputs
R4622 User output
R4625 Position low
R4096 Drive control
R8028 Timer1
R8029 Timer2
R8683..R8685 User registers

Gutter markers

! Error on this line
W Warning on this line
i Hint
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Limits

Max 128 instructions
Stack depth = 1
No FOR / WHILE / nested IF
No arithmetic in conditions