3.1.4 LED display and control elements LED顯示和控制元素 LEDs and switches LED和開關 The LEDs on the front panel show essential status information and diagnostic data.The operating mode can be changed using the switches。 前面板上的LED燈顯示基本狀態資訊和診斷資料。操作模式可以通過開關來更改。

LED	COLOR	STATUS	Meaning
PWR 電源燈	Green 綠色	ON 亮	Power supply correctly connected, 24V DC voltage is applied 電源正確連線24VDC電源
		OFF 滅	No supply voltage Power supply not correctly connected 沒有電源電壓 電源接線不正確
ERR 錯誤燈	RED 紅色	ON 亮	Hardware error during self-test 自檢時發生硬體錯誤
		Flashing 閃爍	Error occurred, LED continues to flash until the system is stopped or started again 有錯誤發生，LED連續閃爍直到系統停止或者重啟
		OFF 滅	No error 沒有錯誤
	Orange 橙色	Flashing 閃爍	Write or read operation on the SD card SD卡上有讀寫操作
RUN 執行燈	Green 綠色	ON 亮	AC 900F is operating RUN AC900F正在執行
	Red 紅色	ON 亮	AC 900F was stopped STOP AC900F停止
P/S 主備燈	Green on Primary “主”控制器燈橙色亮	ON 亮	In redundant configurations, the active AC 900F is referred to as Primary. Synchronous operation as normal state 在冗餘配置下，此執行的AC900F為“主” 同步操作為正常狀態
		Flashing 閃爍	Non synchronous operation as transition state; occurs when the data are not aligned with the Secondary 非同步操作，為正在同步的過渡狀態。 當主備資料不一致的時候發生
	Orangeon Secondary “備”控制器橙色燈亮	ON 亮	Synchronization mode 同步模式
		Flashing 閃爍	Synchronization on 正在同步
	Red onSecondary “備”控制器紅色燈亮	ON 亮	Redundancy synchronization failed 冗餘同步失敗
	OFF 滅		No redundancy configured沒有冗餘配置
BATT 電池燈	GREEN 綠色	ON 亮	Sufficient battery capacity for the indicated buffering time 足夠的電池容量以滿足指定的緩衝時間
	Red 紅色	ON 亮	Battery test during power-up 上電時的電池測試 Empty battery 空電池 Battery not connected 有電池，但電池未接線
	Orange 橙色	ON 亮	The battery must be replaced. 電池必須更換

Three switches are provided for the following functions: 三個面板開關提供下面的功能： – RUN/STOP 執行/停止切換 – TOGGLE (Primary/ Secondary) 主備切換 – RESET 重啟 RUN/STOP switch 執行停止開關 This switch is used to start and stop the program sequence. In redundant mode, theposition of the RUN/STOP switch on the active AC 900F is used. 此開關用於啟動和停止程式序列，也就是決定要不要執行程式序列。主AC900F控制器上RUN/STOP切換開關在使用，也就是說去撥備用控制器上這個開關時不能啟動/停止程式序列的。 Both controllers perform the command (Run or Stop). The LED display on thePrimary shows the current status. In the case of a redundancy change-over, the laststatus is retained irrespective of the RUN/STOP switch position. 兩個控制器執行命令（執行或者停止）。主控制器上的LED指示燈顯示當前狀態，當冗餘切換時，無論執行/停止切換位置如何，都保留最後一個狀態。 Change-over to Run 轉換到執行 Normal operation. The program sequence is started. If the module isreset and a self-test is subsequently started, no configuration menuappears at the diagnostic interface。

正常操作。程式序列已啟動。如果模組重置，隨後開始自檢，則診斷介面中不會顯示配置選單。

Change-over to Stop 轉換到停止 The program sequence is stopped. If the module is reset and a selftest is subsequently started, the configuration menu appears at thediagnostic interface.

程式序列已停止。如果模組重置，隨後開始自檢，則配置選單將顯示在診斷介面。

TOGGLE switch 主備切換開關 With a redundant AC 900 F configuration in synchronized state, a change-over ofthe TOGGLE switch on the Primary produces the following effect: The previousSecondary changes immediately to Primary and the previous Primary to Secondarywithout requiring any system rebooting. Any actuation of the TOGGLE switch onthe Secondary will be ignored. 配置為同步狀態下的冗餘AC 900F，“主”控制器上的切換開關撥動或產生下面的效果：以前為備用的（控制器）立即成為主（控制器），以前為主（控制器）的立即成為備（控制器），這無需任何系統重啟。在備用控制器上撥這個開關將被忽略。 RESET switch 重啟開關 The RESET switch is used to reset the AC 900F. Depending on the system status,either a warm or a cold start is initiated. A “tool“ (e.g. a ball pen or similar) isrequired to actuate the RESET switch。 重啟開關用於AC900F的重啟。根據系統狀態，要麼是熱啟動，要麼是冷啟動。執行 RESET 開關需要"工具"（例如球筆或類似工具，這應該是為了防止誤觸） When the RESET switch is pressed for a specified time, the following functions willbe released: 當重啟開關持續按下以下時間時，下列功能將執行 Single controller 單控制器 < 4 s = Warm start 小於4秒，熱啟動 > 4 s = Cold start 大於等於4秒，冷啟動 Redundant controller 冗餘控制器 < 4 s = no function 小於4秒，啥也不做 > 4 s = redundancy change-over and cold start of the controller with actuatedRESET switch 大於等於4秒，冗餘切換，該控制器冷啟動 SD card reader SD讀卡器 The SD card reader is used for data backup, for restoring the application as well asfor updating the firmware. Additional to this, a backup of the project file can beexported from Freelance Engineering to the SD Card (details see EngineeringManual System Configuration). All high-quality SD cards with 1 GB up to 32 GBare supported. With an appropriate adapter, mini and micro SD cards can be used aswell. SD讀卡器用於資料備份，為恢復應用程式和升級韌體。此外，專案檔案的備份能夠衝工程師站匯出到SD卡。（詳細資訊請參閱工程手冊系統配置）支援從1GB到32GB的高質量SD卡。使用合適的介面卡，迷你和微型 SD 卡也可以使用。

During a write or read operation on the SD card, the error LED flashes orange on the AC 900F. 當SD卡做讀寫操作時，AC900F上的錯誤指示燈橙色閃爍。 To avoid data loss or inconsistent data, the SD card must not be removed during a write or read operation, the power supply must not be interrupted and no redundancy toggle should be performed 為避免資料丟失或者資料不一致，在讀寫操作時，SD卡不能取出，電源不能中斷，不能冗餘切換。