產(chǎn)品內(nèi)容介紹
A-B 8520-FOP控制操作界面
關(guān)于顯式消息傳遞顯式消息傳送用于傳輸不需要連續(xù)的數(shù)據(jù)更新。使用顯式消息傳遞，您可以配置和監(jiān)視從設(shè)備的網(wǎng)絡(luò)上的參數(shù)。執(zhí)行顯式消息時，默認(rèn)情況下不會建立連接，因為是一條“未連接”消息。當(dāng)消息事務(wù)的計時為重要的是，您可以在控制器和驅(qū)動器，方法是選中“通信”選項卡上的“已連接”框消息設(shè)置期間的消息配置對話框。這些消息連接是I/O連接之外的連接。然而，為了獲得更多消息連接降低了網(wǎng)絡(luò)性能。如果您的申請不能容忍這種情況，請不要選中建議的“已連接”框。要向其他驅(qū)動器端口中的其他設(shè)備發(fā)送消息，請參閱中的實例表附錄C：
?第163頁DPI參數(shù)對象部分，了解設(shè)備參數(shù)。
?第177頁主機(jī)DPI參數(shù)對象部分，了解主機(jī)參數(shù)。
在“消息配置”對話框中，將“實例”字段設(shè)置為適當(dāng)?shù)闹翟谠O(shè)備所在端口的范圍內(nèi)。PowerFlex 750系列驅(qū)動器具有明確的消息傳遞限制。表5顯示這些驅(qū)動器的EtherNet/IP對象類代碼兼容性。執(zhí)行顯式信息顯式消息傳遞過程中有五個基本事件。每個的詳細(xì)信息步驟將根據(jù)所使用的控制器類型而有所不同。請參閱控制器的文檔。要在RSLogix 5000軟件中顯示消息配置對話框，請?zhí)砑酉⒅噶睿∕SG），為消息創(chuàng)建新標(biāo)記（屬性：基本標(biāo)記類型、MESSAGE數(shù)據(jù)類型、控制器范圍），然后單擊按鈕在消息指令中。
本節(jié)中的讀寫消息示例適用于設(shè)備使用類代碼0x93的參數(shù)。
對于主機(jī)參數(shù)，請使用類代碼0x9F，并以與這些示例相同的方式格式化消息的其余部分。
消息配置的服務(wù)類型為“參數(shù)讀取”，即類代碼0x0F，參數(shù)對象。中不支持參數(shù)對象PowerFlex 750系列驅(qū)動器?！矮@取單個屬性”消息用于讀取單個參數(shù)。這段文字是消息示例讀取32位REAL（浮點(diǎn)）參數(shù)的值007-PowerFlex 750系列驅(qū)動器中的[Output Current]。（1） 服務(wù)類型的默認(rèn)設(shè)置為“自定義”，允許輸入服務(wù)類型下拉菜單中不可用的服務(wù)代碼。什么時候從下拉菜單中選擇“自定義”以外的服務(wù)類型，一個合適的十六進(jìn)制。值自動分配給服務(wù)代碼暗顯（不可用）的框。（2） 實例是驅(qū)動器（端口0）中的參數(shù)編號。例如，要讀取PowerFlex 755驅(qū)動器端口5中外圍設(shè)備的參數(shù)4實例將為21504+4=21508。請參閱第163頁的DPI參數(shù)對象（類代碼0x93）或第177頁的主機(jī)DPI參數(shù)目標(biāo)（類代碼0x9F）以確定實例號。
（3） 單擊瀏覽以查找路徑，或鍵入I/O配置文件夾中列出的設(shè)備名稱（在本例中，My_PowerFlex_755_驅(qū)動器）。
（4） 有關(guān)使用DPI參數(shù)對象類代碼0x93或主機(jī)DPI參數(shù)時PowerFlex 750系列驅(qū)動器的限制，請參閱第100頁的表5用于顯式消息傳遞的對象類代碼0x9F。
（5） 在此示例中，輸出電流是一個32位REAL（浮點(diǎn)）參數(shù)，要求在創(chuàng)建控制器標(biāo)簽。要讀取32位整數(shù)參數(shù)，請將標(biāo)記數(shù)據(jù)類型字段設(shè)置為“DINT”。對于16位參數(shù)，請設(shè)置數(shù)據(jù)類型字段為“INT”。請參閱驅(qū)動器文檔，以確定參數(shù)的大小及其數(shù)據(jù)類型。
About Explicit Messaging
Explicit Messaging is used to transfer data that does not require continuous updates. With Explicit Messaging, you can configure and monitor a slave device’s parameters on the network.When an explicit message is performed, by default no connection is made since it is an “unconnected” message. When timing of the message transaction is important, you can create a dedicated message connection between the controller and drive by checking the “Connected” box on the Communications tab message configuration dialog box during message setup. These message connections are in addition to the I/O connection. However, the trade off for more message connections is decreased network performance. If your application cannot tolerate this, do not check the “Connected” box, which is recommended.To message to another device in a different drive port, see the Instance table in Appendix C: ? DPI Parameter Object section on page 163 for Device parameters. ? Host DPI Parameter Object section on page 177 for Host parameters. In the Message Configuration dialog box, set the Instance field to an appropriate value within the range listed for the port in which the device resides.PowerFlex 750-Series drives have explicit messaging limitations. Table 5 shows the EtherNet/IP Object Class code compatibilities for these drives.
Performing Explicit Messaging
There are five basic events in the Explicit Messaging process. The details of each step will vary depending on the type of controller being used. See the documentation for your controller.To display the Message Configuration dialog box in RSLogix 5000 software, add a message instruction (MSG), create a new tag for the message (Properties: Base tag type, MESSAGE data type, controller scope), and click the button in the message instruction.The read and write messaging examples in this section are for Device parameters which use Class Code 0x93. For Host parameters, use Class Code 0x9F and format the rest of the message in the same way as these examples. The Message Configuration has a Service Type of “Parameter Read” which is Class code 0x0F, Parameter Object. Parameter Object is not supported in PowerFlex 750-series drives.A Get Attribute Single message is used to read a single parameter. This read message example reads the value of the 32-bit REAL (floating point) parameter 007 - [Output Current] in a PowerFlex 750-Series drive.
(1) The default setting for Service
Type is “Custom,” enabling entry of a Service Code not available from the Service Type pull-down menu. When choosing a Service Type other than “Custom” from the pull-down menu, an appropriate Hex. value is automatically assigned to the Service Code box which is dimmed (unavailable). (2) The instance is the parameter number in the drive (Port 0). For example, to read parameter 4 of a peripheral in Port 5 of a PowerFlex 755 drive, the instance would be 21504 + 4 = 21508. See DPI Parameter Object on page 163 (Class code 0x93) or Host DPI Parameter Object on page 177 (Class code 0x9F) to determine the instance number. (3) Click Browse to find the path, or type in the name of the device listed in the I/O Configuration folder (for this example, My_PowerFlex_755_Drive). (4) See Table 5 on page 100 for limitations of PowerFlex 750-Series drives when using DPI Parameter Object Class code 0x93 or Host DPI Parameter Object Class code 0x9F for explicit messaging. (5) In this example, Output Current is a 32-bit REAL (floating point) parameter requiring the Data Type field to be set to “REAL” when creating the controller tag. To read a 32-bit integer parameter, set the tag Data Type field to “DINT.” For a 16-bit parameter, set the Data Type field to “INT.” See the drive documentation to determine the size of the parameter and its data type.
公司主營產(chǎn)品圖展示
產(chǎn)品優(yōu)勢
1：國外專業(yè)的供貨渠道，具有價格優(yōu)勢
2：產(chǎn)品質(zhì)量保證，讓您售后無憂
3：全國快遞包郵
4：一對一服務(wù)
公司主營范圍簡介
PLC可編程控制器模塊，DCS卡件，ESD系統(tǒng)卡件，振動監(jiān)測系統(tǒng)卡件，汽輪機(jī)控制系統(tǒng)模塊，燃?xì)獍l(fā)電機(jī)備件等，優(yōu)勢品牌：Allen Bradley、BentlyNevada、ABB、Emerson Ovation、Honeywell DCS、Rockwell ICS Triplex、FOXBORO、Schneider PLC、GE Fanuc、Motorola、HIMA、TRICONEX、Prosoft等各種進(jìn)口工業(yè)零部件、歐美進(jìn)口模塊。
產(chǎn)品廣泛應(yīng)用于冶金、石油天然氣、玻璃制造業(yè)、鋁業(yè)、石油化工、煤礦、造紙印刷、紡織印染、機(jī)械、電子制造、汽車制造、塑膠機(jī)械、電力、水利、水處理/環(huán)保、鍋爐供暖、能源、輸配電等等
