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Read and Write (DWORD)

Instruction Parameters​

Supported PLC Series​

XPnA/1RXPnBXPnEXPnFCP3A/B/P/U
CP4A~D/U		CPnECPnFBPPLC-S
✓✓✓✓✓✓✓✓✓

Supported Data Registers​

MXYKLFTCSZRQD@DConstant
S1✓✓✓✓✓✓✓✓-✓✓✓✓✓-
S2✓✓✓✓✓✓✓✓-✓✓✓✓✓✓
D✓-✓✓✓-✓✓---✓✓--

Supported Flags​

FlagBitSupport
ErrorF11.0✓
ZeroF11.1-
CarryF11.2-

Number of Steps​

Steps
4

Operands​

OperandDescription
S1The first operand.
Entries are only DWORD data registers.
This is the location of the data register to read a BOOL value from.
S2The second operand.
Entries are only WORD data registers.
This is the bit number to read of the data register, S1.

The value range is 0 ~ 31.
DThe third operand.
Entries are only BOOL data registers.
This is the bit address of the data register to write the value read from the data register, S1.

Notice​

Error Flag (F11.0) Notice

The error flag, F11.0, will be ON for one scan when the address of the data register assigned by @D exceeds the range of the data register, D. The range of the data register, D, is dependent on the CPU type.

Instruction Behavior

The DTEST and DTESTP instructions behave as follows:

  • The value, S2, is value from 0 ~ 31.
    • If the value, S2, is greater than 15, the remainder of S2 ÷ 32 is the equivalent.
      • Example: if S2 = 34, the remainder is 2. This is the same as S2 = 2.
  • If the BOOL data register, D, is 0, the status of the BOOL data register, D, is OFF.
  • If the BOOL data register, D, is 1, the status of the BOOL data register, D, is ON.

Examples​