1. Sensor Variables (A–D)

These are directly mapped to values extracted from the incoming sensor string.
They represent your live sensor measurements and will be updated whenever F8 (Read Sensors) is executed.

2. Parameter Variables (G–M)

These are user-defined numeric parameters that can be edited in the GUI under:

Basics → Home

You currently support:

• Parameter 1 → G
• Parameter 2 → H
• Parameter 3 → J
• Parameter 4 → K
• Parameter 5 → L
• Parameter 6 → M

Range

0 to 65535

Purpose

These parameters allow the user to:

• Store custom numbers
• Tune program behavior
• Reuse the same value across multiple program steps
• Adjust thresholds or timings without modifying the program code

Examples

• G = pump runtime in milliseconds
• H = equilibration duration
• J = number of samples to take
• K = valve channel number

We will show these examples in the documentation section 5.1.4 Examples.

3. System Variables (R, X, Y, Z)

These are internal helper variables used in formulas and program logic.

Notes:

• R is overwritten each time a formula function is executed.
• X, Y, Z are typically manipulated using special User Program functions (e.g., increment, reset, compare).
• They allow users to build loops or count events.

Summary Table

For the documentation, we’ll present this clean table: