Keep - Keep(11) - Omron CQM1H - PROGRAM Programming Manual

Programmable controllers; inner boards

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Bit Control Instructions

KEEP – KEEP(11)

The status of operand bits for SET and RSET programmed between IL(02)

and ILC(03), or JMP(04) and JME(05), will not change when the interlock or

jump condition is met (i.e., when IL(02) or JMP(04) is executed with an OFF

execution condition).

There are no flags affected by these instructions.

The following examples demonstrate the difference between OUT and SET/

RSET. In the first example (Diagram A), IR 10000 will be turned ON or OFF

whenever IR 00000 goes ON or OFF.

In the second example (Diagram B), IR 10000 will be turned ON when IR

00001 goes ON and will remain ON (even if IR 00001 goes OFF) until IR

00002 goes ON.

Ladder Symbol

Any output bit can generally be used in only one instruction that controls its

KEEP(11) is used to maintain the status of the designated bit based on two

execution conditions. These execution conditions are labeled S and R. S is

the set input; R, the reset input. KEEP(11) operates like a latching relay that is

set by S and reset by R.

When S turns ON, the designated bit will go ON and stay ON until reset,

regardless of whether S stays ON or goes OFF. When R turns ON, the desig-

nated bit will go OFF and stay OFF until reset, regardless of whether R stays

ON or goes OFF. The relationship between execution conditions and

KEEP(11) bit status is shown below.

S execution condition

R execution condition

There are no flags affected by this instruction.

Address Instruction

Address Instruction

Operand Data Areas

IR, SR, AR, HR, LR

Chapters

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