ABB觸摸屏PP875 3BSE092977R1操作使用過程

除主功能外，PROFIBUS網關還執行多種附加功能，包括在以下章節中介紹。

5.1固件下載包含裝置整個應用軟件代碼的固件存儲在非易失性FlashEPROM中。可以通過服務端口加載新固件版本。通過串行鏈路下載使用終端。exe PC程序，可以通過串行鏈路從連接的PC加載新固件通過服務接口。

5.2故障保護

現場總線監督

現場總線上的通信由MCU使用超時機制進行監控。網關循環向MCU發送消息（nvoFailsafe）。故障情況已定義，因為MCU尚未在一定時間內從網關接收到消息（GW參數：Failsafe Heartbeat，MCU參數：故障保護超時）。在故障情況下，MCU進入配置狀態。如果參數“Failsafe超時PLC”未激活，現場總線立即啟動監控。

請注意：PR 112和ITS不提供故障保護機制。

PROFIBUS和現場總線的監控PROFIBUS上的通信由網關使用超時機制進行監控，即故障

當PCS未將PROFIBUS寫入輸出表的字節0、位0循環設置為1時，可識別這種情況。

可以配置此超時值（故障保護超時PLC）。網關通過以下方式響應故障情況通過LON網絡向每個現場設備發送消息（nvoFailsafe=激活）。

之后現場設備進入配置狀態。

在此PCS或PROFIBUS故障總線監控啟動后再次設置位0。

5.3開關設備壽命清單為了監督LON網絡上其他單元的網關和MMI的可用性電臺在網絡上周期性地發送心跳消息。每個開關設備單元都會收到此消息生成生命列表，生命列表會周期性更新。一個開關設備單元將此列傳播到所有現場設備（ITS除外）。生命列表也出現在PROFIBUS讀取輸入表中。

壽命清單中每個開關設備單元站的位置可通過CA優先級進行配置。循環時間（SU生命信號心跳）、超時（SU生命信號超時）和心跳（SU壽命列表心跳）是可配置。智能層交換機是ABB SlimLine交換機保險絲集成傳感器和基于微處理器測量和監視用電子設備LON是LonWorks網絡的縮寫。A.LON的變化被用作INSUM系統

In addition to the main function, PROFIBUS Gateway performs a variety of additional functions, which are described in the following chapters. 5.1 Firmware-Download The Firmware containing the whole application software code of the units is stored in a non-volatile FlashEPROM. A new firmware version can be loaded via service port. Download via the Serial Link Using terminal.exe PC program, the new firmware can be loaded from a connected PC via the serial link through the service interface. 5.2 Failsafe Supervision of field bus The communication on the field bus is supervised by the MCU using a timeout-mechanism. The gateway sends cyclically a message (nvoFailsafe) to the MCU. The fault situation is defined, as a MCU has not received a message from gateway for a certain time (GW Parameter: Failsafe Heartbeat, MCU parameter: Failsafe Timeout). In a fault situation the MCU goes into configured state. In case parameter "Failsafe timeout PLC" is not activated supervision of field bus starts immediately. Please note: Failsafe mechanism is not available for PR 112 and ITS. Supervision of the PROFIBUS and fieldbus The communication on the PROFIBUS is supervised by gateway using a timeout-mechanism , i.e. a fault situation is recognised when byte 0, bit 0 of PROFIBUS Write Output Table is not set cyclic by PCS to 1. This timeout value (Failsafe timeout PLC) can be configured. The Gateway responds the fault situation by sending of a message (nvoFailsafe= activated) via the LON-network to each field device. Afterwards the field device goes into configured state. After this PCS or PROFIBUS failure bus supervision starts by setting of bit 0 again. 5.3 Life List for Switchgear Units To supervise the availability of the Gateways and the MMIs for other units on the LON network these stations cyclically send a heartbeat message on the net. Every switchgear unit receives this message and generates a Life List, which is cyclically updated. One switchgear unit propagates this list to all field devices (except ITS). Life List appears in PROFIBUS Read Input Table too. Position of every switchgear unit station in Life List is configurable by CA Priority. The cycle time (SU Lifesign Heartbeat), the timeout (SU Lifesign Timeout) and heartbeat (SU Lifelist Heartbeat) are configurable.