BK> (greater than) & BK>P (greater than one-shot)

Instruction Parameters

Supported PLC Series

PLC-AES	PL-FB	PLC-ES
✓	✓	✓

Supported Data Registers

	M	X	Y	K	L	F	T	C	S	Z	R	Q	D	@D	Constant
S1	✓	✓	✓	✓	✓	✓	✓	✓	–	✓	✓	✓	✓	✓	✓
S2	✓	✓	✓	✓	✓	✓	✓	✓	–	✓	✓	✓	✓	✓	–
D	✓	–	✓	✓	✓	–	–	–	–	✓	✓	✓	✓	✓	–
B	✓	✓	✓	✓	✓	✓	✓	✓	–	✓	✓	✓	✓	✓	✓
n	✓	✓	✓	✓	✓	✓	✓	✓	–	✓	✓	✓	✓	✓	✓

Supported Flags

Flag	Bit	Support
Error	F11.0	✓
Zero	F11.1	–
Carry	F11.2	–

Number of Steps

Steps
6

Operands

Operand	Description
S1	The first operand. Entries are WORD data registers or constants. This is the starting data register for the first range of n data registers to compare to S2. This requires n data registers. The signed value range is -32,768 ~ 32,767 (216). The Hexadecimal value range is H0000 ~ HFFFF.
S2	The second operand. Entries are only WORD data registers. This is the starting data register for the second range of n data registers to compare to S1. This requires n data registers. The signed value range is -32,768 ~ 32,767 (216). The Hexadecimal value range is H0000 ~ HFFFF.
D	The third operand. Entries are only WORD data registers. This is where the comparison result is saved. This could require more than 1 WORD data register.
B	The fourth operand. Entries are BOOL data registers or constants. This is the starting bit address to save the comparison results to.
n	The fifth operand. Entries are WORD data registers or constants. This is the amount of data registers to compare starting at S1 and S2.

Notice

Ladder Diagram Examples

BK>

The BK> instruction compares n number of WORD data registers starting at S1 to n number of WORD data registers starting at S2. For each data register in the range S1 ~ Sn that is greater than each data register in the range S2 ~ Sn, the corresponding bit in the data register D, starting at bit number B, will turn ON (1).

instruction will compare the following expressions for a true or false value:”/>

• The BK> instruction will compare the following expressions for a true or false value:
  • D75 > D81 → 8,254 > -4,561
  • D76 > D82 → 21,345 > 25,134
  • D77 > D83 → -23,465 > 8,642
  • D78 > D84 → -2,315 > -2,564
  • D79 > D85 → 5,252 > 2,525

• When the open contact, M0.0, is powered ON (1), the values of the data registers are compared.
  • D75 > D81 → 8,254 > -4,561 (TRUE → D87.2 = 1)
  • D76 > D82 → 21,345 > 25,134 (FALSE → D87.3 = 0)
  • D77 > D83 → -23,465 > 8,642 (FALSE → D87.4 = 0)
  • D78 > D84 → -2,315 > -2,564 (TRUE → D87.5 = 1)
  • D79 > D85 → 5,252 > 2,525 (TRUE → D87.6 = 1)

Memory Monitor

P instruction compares n number of WORD data registers starting at S1 to n number of WORD data registers starting at S2.”/>

BK>P

The BK>P instruction compares n number of WORD data registers starting at S1 to n number of WORD data registers starting at S2. For each data register in the range S1 ~ Sn that is greater than each data register in the range S2 ~ Sn, the corresponding bit in the data register D, starting at bit number B, will turn ON (1). Every time this instruction executes, it energizes the output only once.

P instruction will compare the following expressions for a true or false value:”/>

• The BK>P instruction will compare the following expressions for a true or false value:
  • D90 > D95 → 7,786 > -2,346
  • D91 > D96 → -10,000 > -12,000
  • D92 > D97 → 31,450 > 30,120

• When the open contact, M0.1, is powered ON (1), the values of the data registers are compared.
  • D90 > D95 → 7,786 > -2,346 (TRUE → D100.5 = 1)
  • D91 > D96 → -10,000 > -12,000 (TRUE → D100.6 = 1)
  • D92 > D97 → 31,450 > 30,120 (TRUE → D100.7 = 1)

Memory Monitor