# Single Bit 資料讀寫指令(01/05)(人機介面常用)

<mark style="color:blue;">指令目的及使用時機： 部分的人機介面僅支援 05寫入指令 發送 重置累計量訊號。其中更有部分人機介面同時要求支援01讀取指令讓人機介面確認感測器能正常工作。</mark>

## 01 指令範例 <a href="#id-01-zhi-ling-fan-li" id="id-01-zhi-ling-fan-li"></a>

Comment本指令不會重置C02.Del.Total清除累計數據選項，只提供人機介面01/05讀取Single Bit功能。 01 指令格式正確，會收到的控制端主機本體回覆，只能回覆讀取Bit行為。

### 控制端發(01)TX指令讀取格式範例 <a href="#kong-zhi-duan-fa-01tx-zhi-ling-du-qu-ge-shi-fan-li" id="kong-zhi-duan-fa-01tx-zhi-ling-du-qu-ge-shi-fan-li"></a>

| Byte#      | 1             | 2             | 3        | 4        | 5       | 6       | 7   | 8   |
| ---------- | ------------- | ------------- | -------- | -------- | ------- | ------- | --- | --- |
| Node ID    | Slave Address | Function Code | 讀取的記憶體地址 | 讀取的記憶體地址 | 讀取資料Bit | 讀取資料Bit | CRC | CRC |
| 範例內容01\~FF | 01            | 01            | 02       | 01       | 00      | 01      | AD  | B2  |

#### 控制端發送TX格式說明:

Slave address: 01(本流量計地址)

Function code: 01(1bit 讀取指令)

讀取數據的啟始地址: 02 01(C02.Del. Total清除累計的啟始地址)

讀取資料Bit: 00 01 (讀取C02.Del. Total資料)

CRC: AD B2(依 CRC 算法計算出的糾錯碼)

### 流量計(01)RX讀取回覆格式範例

<table data-header-hidden><thead><tr><th>Byte#</th><th>1</th><th>2</th><th>3</th><th>4</th><th>7</th><th>8</th><th data-hidden>5</th><th data-hidden>6</th></tr></thead><tbody><tr><td>Byte#</td><td>1</td><td>2</td><td>3</td><td>4</td><td>5</td><td>6</td><td>5</td><td>6</td></tr><tr><td>Node ID</td><td>Slave Address</td><td>Function Code</td><td>讀取回覆Bit</td><td>讀取回覆Bit</td><td>CRC</td><td>CRC</td><td>寫入資料</td><td>寫入資料</td></tr><tr><td>範例內容01~FF</td><td>01</td><td>01</td><td>01</td><td>00</td><td>51</td><td>88</td><td>00</td><td>00</td></tr></tbody></table>

#### 流量計回覆讀取RX格式說明:

Slave address: 01(本流量計地址)

Function code: 01(讀取指令)

讀取回覆Bit: 01 00(Slave 本體仍正常在線工作，並回應行為給控制端)

CRC:  51 88(依 CRC 算法計算出的糾錯碼)

## 05 指令範例

<mark style="color:blue;">本指範例將會啟用C02.Del. Total清除累計數據選項，total 會歸零</mark>。

### 控制端發(05)TX指令格式範例

| Byte#      | 1             | 2             | 3        | 4        | 5    | 6    | 7   | 8   |
| ---------- | ------------- | ------------- | -------- | -------- | ---- | ---- | --- | --- |
| Node ID    | Slave Address | Function Code | 寫入的記憶體地址 | 寫入的記憶體地址 | 寫入資料 | 寫入資料 | CRC | CRC |
| 範例內容01\~FF | 01            | 05            | 02       | 01       | FF   | 00   | DC  | 42  |

#### 控制端發送TX格式說明

Slave address: 01(本流量計地址)

Function code: 05(Register寫入指令)

寫入數據的啟始地址: 02 01(C02.Del. Total清除累計的啟始地址)

寫入資料:  FF 00(寫入重置C02.Del. Total資料 <mark style="color:blue;">)</mark>

CRC: DC 42(依 CRC 算法計算出的糾錯碼)

### 流量計(05)RX回覆格式範例

| Byte#      | 1             | 2             | 3        | 4        | 5    | 6    | 7   | 8   |
| ---------- | ------------- | ------------- | -------- | -------- | ---- | ---- | --- | --- |
| Node ID    | Slave Address | Function Code | 寫入的記憶體地址 | 寫入的記憶體地址 | 寫入資料 | 寫入資料 | CRC | CRC |
| 範例內容01\~FF | 01            | 05            | 02       | 01       | FF   | 00   | DC  | 42  |

#### 流量計回覆RX格式說明

Slave address: 01(本流量計地址)

Function code: 05(Register寫入指令)

寫入數據的啟始地址: 02 01(寫入C02.Del. Total清除累計記憶體地址)

寫入資料:  FF 00 (主機本體回覆寫入重置行為給控制端)

CRC:  DC 42(依 CRC 算法計算出的糾錯碼)


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