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Maximum Value (WORD)

Instruction Parameters​

Supported PLC Series​

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

Supported Data Registers​

MXYKLFTCSZRQD@DConstant
S✓✓✓✓✓-✓✓-✓-✓✓✓-
D✓-✓✓✓-✓✓-✓-✓✓✓-
n✓✓✓✓✓✓✓✓-✓✓✓✓✓✓

Supported Flags​

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

Number of Steps​

Steps
4

Operands​

OperandDescription
SThe first operand.
Entries are only WORD data registers.
This is the starting register to find the largest possible number.

The signed value range is -32,768 ~ 32,767 (216).
The unsigned value range is 0 ~ 65,535 (216-1).
The Hexadecimal value range is H0000 ~ HFFFF.
DThe second operand.
Entries are only WORD data registers.
This is where the maximum value found and its data register are saved.
This requires 3 WORD data registers.
nThe third operand.
Entries are WORD data registers or constants.
This is the amount of data registers to search through starting at D.

The value range is 1 ~ 32,767 (215-1).

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.

F11.0 turns ON when the value of the data for n exceeds the value range 1 ~ 32,767 (215-1).

Instruction Behavior

The MAX and MAXP instructions behave as follows:

  • Both instructions require 3 data registers starting at the data register, D.
    • D saves the maximum number found in the search range.
    • D+1 saves the first occurrence index of the maximum number found in the search range.
    • D+2 saves the amount of times the maximum number was found in the search range.
  • If n is less than 1 or greater than 32,767, neither instruction will execute.

Examples​