While you can program via the buttons on the device, it is tedious for large programs.
Counters can count up (CU) or down (CD).
Application: Count 50 bottles passing a photoeye (I2). When count = 50, energize Q3 (diverting arm). Then reset the counter.
| Feature | Spec | |---------|------| | Power | 100-240V AC | | Displays | 4 lines x 12 chars (LCD backlit) | | I/O | 12 inputs (AC/DC), 6 relay outputs (8A) | | Expandable | Yes (up to 40 I/O via easy800 modules) | | Software | XSoft-CoDeSys or easySoft (v7+) | | Memory | 256 function blocks (max program size) | moeller easy512-ac-rc programming manual
Let’s write a full program for a water tank using the easy512-AC-RC.
Requirements:
Program Steps in easySoft:
| Rung | Logic |
|------|-------|
| 1 | Weekly Timer (ON=07:00, OFF=21:00) → Marker M10 (Time Window) |
| 2 | SR (Set-Reset Latch): S = I1 and M10, R = I2 → M11 (Run Command) |
| 3 | Ton Timer (T01, Time = 5 min): Input = M11, Output = M12 (Overtime) |
| 4 | Q1 = M11 and NOT M12 |
| 5 | Q2 = M12 (Alarm LED) |
Result: Upload this to your easy512 and test in simulation. The pump will only start if the low-level switch is active AND the time is within the window. If it runs too long, the alarm trips.
Scenario: High level sensor (I3 with NC – active when level high). Alarm lamp Q3 flashes until I4 (acknowledge button) pressed. While you can program via the buttons on
Logic:
Manually programming via the keypad is powerful but slow. easySoft (versions 4, 5, 6, or the new easyE4 software) provides drag-and-drop circuit diagram editing.
| Error Code | Meaning | Fix | |------------|---------|-----| | E001 | Battery low | Replace CR2032 battery on CPU board (if fitted) | | E101 | Program corrupted | Reload program via easySoft | | E202 | Watchdog timeout | Remove loops or endless jumps; simplify program | | No display but power LED on | Contrast too high/low | Press ↑/↓ while in menu to adjust | Application: Count 50 bottles passing a photoeye (I2)