ABB觸摸屏PP875 3BSE092977R1操作使用過程

除主功能外，PROFIBUS網(wǎng)關(guān)還執(zhí)行多種附加功能，包括在以下章節(jié)中介紹。

5.1固件下載包含裝置整個應(yīng)用軟件代碼的固件存儲在非易失性FlashEPROM中?？梢酝ㄟ^服務(wù)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(wù)接口。

5.2故障保護(hù)

現(xiàn)場總線監(jiān)督

現(xiàn)場總線上的通信由MCU使用超時機制進(jìn)行監(jiān)控。網(wǎng)關(guān)循環(huán)向MCU發(fā)送消息（nvoFailsafe）。故障情況已定義，因為MCU尚未在一定時間內(nèi)從網(wǎng)關(guān)接收到消息（GW參數(shù)：Failsafe Heartbeat，MCU參數(shù)：故障保護(hù)超時）。在故障情況下，MCU進(jìn)入配置狀態(tài)。如果參數(shù)“Failsafe超時PLC”未激活，現(xiàn)場總線立即啟動監(jiān)控。

請注意：PR 112和ITS不提供故障保護(hù)機制。

PROFIBUS和現(xiàn)場總線的監(jiān)控PROFIBUS上的通信由網(wǎng)關(guān)使用超時機制進(jìn)行監(jiān)控，即故障

當(dāng)PCS未將PROFIBUS寫入輸出表的字節(jié)0、位0循環(huán)設(shè)置為1時，可識別這種情況。

可以配置此超時值（故障保護(hù)超時PLC）。網(wǎng)關(guān)通過以下方式響應(yīng)故障情況通過LON網(wǎng)絡(luò)向每個現(xiàn)場設(shè)備發(fā)送消息（nvoFailsafe=激活）。

之后現(xiàn)場設(shè)備進(jìn)入配置狀態(tài)。

在此PCS或PROFIBUS故障總線監(jiān)控啟動后再次設(shè)置位0。

5.3開關(guān)設(shè)備壽命清單為了監(jiān)督LON網(wǎng)絡(luò)上其他單元的網(wǎng)關(guān)和MMI的可用性電臺在網(wǎng)絡(luò)上周期性地發(fā)送心跳消息。每個開關(guān)設(shè)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(guān)設(shè)備單元將此列傳播到所有現(xiàn)場設(shè)備（ITS除外）。生命列表也出現(xiàn)在PROFIBUS讀取輸入表中。

壽命清單中每個開關(guān)設(shè)備單元站的位置可通過CA優(yōu)先級進(jìn)行配置。循環(huán)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(jiān)視用電子設(shè)備LON是LonWorks網(wǎng)絡(luò)的縮寫。A.LON的變化被用作INSUM系統(tǒng)

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.