GEQ — Greater Than or Equal

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Description

GEQ (Greater Than or Equal) is true when Source A is greater than or equal to Source B. It is GRT with the boundary included, and like every compare instruction it writes nothing. Use GEQ when reaching the value should count: “at least N parts”, “at or above setpoint”, “the timer has run this long”. A timer or counter’s own DN bit is a GEQ on its accumulator against its preset; GEQ lets you test the accumulator against any other number. When the boundary must not count, use GRT. GEQ does not accept STRING operands.

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Operands

Operand	Type	Format	Valid Range	Required	Description
Source A	Any numeric tag, member, element or bit, or a literal	Tag, Tag.Member, Tag[n], Tag.bit, or a literal	Any resolvable numeric reference	Yes	The value under test.
Source B	Same as Source A	Same	Any resolvable numeric reference; defaults to 0	Yes	The threshold, inclusive.

Literals may be whole numbers (25, -3, 0x1F) or decimals (72.5). Mixed INT and REAL operands compare as numbers. A BOOL reads as 0 or 1.

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Scan Behavior

Prescan

No state. Evaluates from the current values on the first scan.

Rung-condition-in is false

The instruction does not pass continuity. The block still colours by its own result on the canvas.

Rung-condition-in is true

Both operands are read. If A is greater than or equal to B the instruction conducts; if A is less than B the rung is false from this point.

Postscan

Nothing.

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Example

Scenario: A ten-second TON runs while the motor is on. Halfway through the delay, at five seconds, a “warming up” lamp changes to “almost ready”. The timer’s accumulator is the operand, so no second timer is needed.

Tags:

• MotorRun — Motor run, BOOL
• TMR[0] — TIMER array element, Preset 10000, driven by XIC MotorRun → TON TMR[0] on another rung
• Halfway — Almost-ready lamp, BOOL

Rung 1:

—[GEQ TMR[0].ACC  5000]———(OTE Halfway)———

Scan 1 — the timer reads 2334. 2334 is less than 5000: the block is dark, Halfway = 0. The value line under TMR[0].ACC is the member’s own value, not the timer’s; a member operand reads exactly like a tag.

Scan 2 — the timer has timed out. The block lit the moment the accumulator reached 5000 and Halfway = 1. The frame was taken later, with the accumulator parked at 10000 (a done TON holds ACC at PRE); it stays lit until the motor stops and the timer resets to 0.

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See Also

• GRT — Greater Than (boundary excluded)
• LEQ — Less Than or Equal (the mirror test)
• LIM — Limit Test
• TON — Timer On Delay (the accumulator used in the example)
• Compare Instructions — Category index

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Notes

GEQ A B is LEQ B A. Pick whichever reads naturally on the rung.

Reading an accumulator. TMR[0].ACC and Batch.ACC are ordinary operands. Read them freely; a compare never changes them.

Several thresholds on one timer. Put a GEQ per threshold on its own rung, each against the same accumulator, for a staged sequence from a single delay.