3BSE028588R1使用流程，ABB處理器模塊
當(dāng)使用CommReq打開到遠(yuǎn)程服務(wù)器的Modbus/TCP通道時，如果初始CommReq返回AA90狀態(tài)，未來可能返回Open命令A(yù)890狀態(tài)。這表明本地網(wǎng)絡(luò)資源已經(jīng)已使用，無法用于進(jìn)一步的連接嘗試。如果發(fā)生這種情況，則在進(jìn)行下一次連接之前，應(yīng)用程序必須等待至少60秒企圖這將允許釋放并提供網(wǎng)絡(luò)資源對于下一個Modbus Open命令。
3BSE028588R1使用流程Modbus/TCP請求數(shù)據(jù)包Modbus/TCP服務(wù)器希望以分離TCP數(shù)據(jù)包。如果在單個數(shù)據(jù)包中發(fā)送多個請求，則服務(wù)器可能會也可能不會對每個請求發(fā)送響應(yīng)。如果將響應(yīng)發(fā)送到客戶端，它們將在單獨的TCP數(shù)據(jù)包中發(fā)送。RMS后EGD生產(chǎn)延遲EGD的當(dāng)運(yùn)行模式存儲添加或修改生成的EGD交換時只有經(jīng)過一個生產(chǎn)周期后，才能生產(chǎn)exchange運(yùn)行模式存儲完成后。
當(dāng)通過車站管理器的PING從PLC啟動ICMP回顯請求時，車站管理器PING命令命令時，操作偶爾會失敗，并記錄異常（事件eH，條目2=6H）。
車站管理器“referr”計數(shù)EGD車站管理器“referr”計數(shù)可在以下情況下增加兩次：發(fā)生交換超時。Exchange狀態(tài)字報告工作正常，并且未受影響?！皐kal_idle”AUP參數(shù)應(yīng)不允許零“wkal_idle”（TCP保持活動計時器）允許為零，但它是無效值。如果出現(xiàn)以下情況，TCP連接可能會提前超時：超時設(shè)置為10分鐘以上如果TCP連接超時設(shè)置高于10分鐘，則連接可能會中斷配置值之前超時。連接超時來自三個AUP參數(shù)：wkal\u空閑+（wkal\u cnt+1）*wkal\u intvl。符合FCC 47 CFR 15和EN55011 A類輻射發(fā)射的安裝要求限制，以太網(wǎng)電纜應(yīng)屏蔽。
When using a CommReq to open a Modbus/TCP Channel to a remote server, if
the initial CommReq returned an AA90 status, future Open Commands may return
an A890 status. This indicates that local networking resources have been
consumed and are not available for further connection attempts. If this occurs, the
application must wait at least 60 seconds before making the next connection
attempt. This will allow networking resources to be released and made available
for the next Modbus Open Command.
Modbus/TCP request packets The Modbus/TCP server expects to receive each Modbus/TCP request in a
separate TCP packet. If multiple requests are sent in a single packet, the server
may or may not send a response to each request. If responses are sent to the
client, they will be sent in separate TCP packets.
EGD production delayed after RMS
of EGD
When a produced EGD exchange is added or modified by a Run-mode Store, the
exchange will not be produced until one production period of time has elapsed
after the completion of the run-mode store.
Station Manager PING commands When initiating ICMP echo requests from the PLC via Station Manager’s PING
command, the operation occasionally fails and an exception is logged (Event eH,
Entry 2 = 6H).
Station Manager “referr” tally The EGD Station Manager “referr” tally may be incremented twice when an
exchange timeout occurs. Exchange status word reporting works correctly and is
not impacted.
“wkal_idle” AUP parameter should
not allow zero
Zero is allowed for the “wkal_idle” (TCP keep alive timer) but it is an invalid value.
TCP connection may time out early if
the timeout is set above 10 minutes
If the TCP connection timeout is set higher than 10 minutes, the connection may
timeout before the configured value. The connection timeout is derived from three
AUP parameters:
wkal_idle + (wkal_cnt + 1) * wkal_intvl.Installation Requirements For compliance with FCC 47 CFR 15 and EN55011 Class A Radiated Emissions
limits, Ethernet cables should be shielded.
