***
### If the change is on PLC S7 - 3xx - Reset Totallizer
***
* Check that on the BlenderCtrl_MFM Command tha command must be using 1 instead of 3 to reset the counters

```pascal
IF #mResetWaterTot THEN
    #mWaterVFMCtrl := 1 ;
ELSE
    #mWaterVFMCtrl := 0 ;
END_IF;

IF #mResetSyrupTot THEN
    #mSyrupMFMCtrl :=  1 ;
ELSE
    #mSyrupMFMCtrl := 0 ;
END_IF;

IF #mResetCO2Tot THEN
    #mCO2MFMCtrl := 1 ;
ELSE
    #mCO2MFMCtrl := 0 ;
END_IF;

IF #mResetProductTot THEN
    #mProductMFMCtrl := 1 ;
ELSE
    #mProductMFMCtrl := 0 ;
END_IF;
```

### Resetting Totalizers via PROFIBUS PA (Promass F 300)

#### 1. PROFIBUS Module Mapping

| Slot | GSD Module     | Associated Totalizer |
| ---- | -------------- | -------------------- |
| 9    | `SETTOT_TOTAL` | Totalizer 1          |
| 10   | `SETTOT_TOTAL` | Totalizer 2          |
| 11   | `SETTOT_TOTAL` | Totalizer 3          |

Each slot represents a 5‑byte output block sent **from the master to the transmitter**.

### Byte Layout (Master → Instrument)

| Byte | Field      | Purpose         | Allowed Values                                            |
| ---- | ---------- | --------------- | --------------------------------------------------------- |
| 1    | **SETTOT** | Control command | ==0 = Run (totalise) <br> **1 = Reset** <br> 2 = Preset== |
| 2    | MODETOT¹   | Counting mode   | 0 = Balance <br> 1 = Only + <br> 2 = Only – <br> 3 = Stop |
| 3‑5  | —          | Reserved        | —                                                         |

¹ The short module (default) omits `MODETOT`; only the long variant includes it.

### Byte Layout (Instrument → Master)

| Byte | Field | Description                              |
| ---- | ----- | ---------------------------------------- |
| 1‑4  | TOTAL | Current totalizer value (IEEE‑754 float) |
| 5    | STAT  | Quality & status bits (0x80 = GOOD)      |

---

## 2. Resetting a **Single** Totalizer

1. Identify the slot of the target totalizer (9, 10 or 11).
2. Write **1** to Byte 1 (`SETTOT`) of that slot.
3. Wait one bus cycle (≈ 10–100 ms).
4. Write **0** back to Byte 1 to resume counting.
5. Read `TOTAL` (bytes 1‑4 in the corresponding input module) and verify it is **0.0**.

> **Example – Reset Totalizer 2**
> Slot 10 / Byte 1 = **1 → 0**


---

## 3. Resetting **All** Totalizers

* Issue the **1** command simultaneously to Byte 1 of Slots 9, 10 and 11 **or**
* Activate the configurable discrete input *“Reset all totalizers”* for at least the debounce time (5–200 ms).