HIEE410409P104控制卡件,處理器卡件
RX3i模擬HART模塊不支持多點(diǎn)通信（即信道上的多個(gè)現(xiàn)場(chǎng)設(shè)備），也不支持突發(fā)模式傳輸。RX3i HART模塊自動(dòng)向配置中存在并啟用的任何HART設(shè)備發(fā)出HART命令。這些命令的響應(yīng)數(shù)據(jù)保存在RX3i HART模塊的內(nèi)部存儲(chǔ)器中，并通過(guò)HART數(shù)據(jù)的輸入掃描或通過(guò)獲取設(shè)備信息COMMREQ（命令1）提供給RX3i控制器。RX3i HART模塊可配置為通過(guò)使用HART數(shù)據(jù)掃描控制通過(guò)輸入掃描使HART設(shè)備數(shù)據(jù)可用于RX3i控制器。使用此選項(xiàng)，來(lái)自每個(gè)設(shè)備的自動(dòng)HART命令響應(yīng)數(shù)據(jù)被格式化并寫入HART數(shù)據(jù)參考地址處的RX3i參考存儲(chǔ)器。這發(fā)生在正常RX3i輸入掃描期間。此選項(xiàng)可能已禁用?？膳渲脙煞N自動(dòng)數(shù)據(jù)顯示模式：“所有數(shù)據(jù)”和“動(dòng)態(tài)數(shù)據(jù)”。·Dynamic Only定期執(zhí)行HART命令#3，并將生成的PV、SV、TV和FV變量提供給RX3i輸入?yún)⒖即鎯?chǔ)器。如果啟用HART槽變量，HART命令#33槽變量值也會(huì)自動(dòng)更新。僅動(dòng)態(tài)數(shù)據(jù)還包括最新的通信和設(shè)備狀態(tài)?！に袛?shù)據(jù)選項(xiàng)提供與僅動(dòng)態(tài)選項(xiàng)相同的信息，以及來(lái)自HART命令0、12、13、15、16、48和50的附加數(shù)據(jù)。在啟動(dòng)期間或設(shè)備配置發(fā)生變化后（如設(shè)置的HART設(shè)備上的“配置變化”位所示），RX3i HART模塊執(zhí)行HART命令0、3、12、13、15、16、33、48和50（所有數(shù)據(jù)模式）。此外，如果啟用HART槽變量（動(dòng)態(tài)數(shù)據(jù)模式），模塊會(huì)定期重新發(fā)出命令#3和#33。發(fā)出動(dòng)態(tài)數(shù)據(jù)命令的重復(fù)周期取決于HART直通服務(wù)選項(xiàng)的配置以及調(diào)制解調(diào)器組中啟用的HART設(shè)備的數(shù)量。每次HART設(shè)備初始化時(shí)，都會(huì)發(fā)出第59號(hào)HART命令：它將前導(dǎo)碼的數(shù)量設(shè)置為5。在許多應(yīng)用中，僅動(dòng)態(tài)選項(xiàng)應(yīng)提供所有所需的HART變量。變量數(shù)據(jù)在HART模塊的輸入掃描數(shù)據(jù)中自動(dòng)更新（無(wú)需COMMREQ觸發(fā)器）。如果僅動(dòng)態(tài)數(shù)據(jù)不足，可使用所有數(shù)據(jù)選項(xiàng)自動(dòng)訪問(wèn)其他HART數(shù)據(jù)。啟用“僅動(dòng)態(tài)”或“所有數(shù)據(jù)”選項(xiàng)會(huì)影響PLC I/O掃描時(shí)間，因?yàn)閬?lái)自模塊的輸入掃描數(shù)據(jù)增加。PACSystems*RX3i系統(tǒng)手冊(cè)第12節(jié)GFK-2314T 2019年9月帶HART通信的模擬模塊493如果兩個(gè)掃描選項(xiàng)都沒(méi)有提供所有必要的輸入，或者如果需要對(duì)HART設(shè)備進(jìn)行額外控制，則可以使用COMMREQ來(lái)提供額外功能或替代自動(dòng)輸入掃描。有三個(gè)COMMREQ可用?！か@取設(shè)備信息COMMREQ（命令1）為HART設(shè)備返回與所有數(shù)據(jù)掃描選項(xiàng)相同的數(shù)據(jù)；然而，此COMMREQ必須在邏輯中重新發(fā)出，以獲得變量數(shù)據(jù)的更新。·HART直通COMMREQ能夠執(zhí)行任何HART命令，包括制造商特定命令；但是，必須小心地正確格式化HART命令請(qǐng)求和響應(yīng)數(shù)據(jù)，這些數(shù)據(jù)必須是字節(jié)壓縮的，并且“大端”格式。本章給出了說(shuō)明?！みh(yuǎn)程獲取設(shè)備信息COMMREQ為HART設(shè)備返回與所有數(shù)據(jù)掃描選項(xiàng)相同的數(shù)據(jù)；然而，此COMMREQ必須在邏輯中重新發(fā)出，以獲得變量數(shù)據(jù)的更新。11.1.2將DO I/O與HART模塊一起使用HART模塊完全支持DOIO功能塊，前提是僅掃描模擬信道值和模擬診斷。然而，當(dāng)HART設(shè)備處于
The RX3i Analog HART module does not support multi-drop communications (i.e. multiple field devices on a channel), nor does it support Burst Mode transmissions. The RX3i HART module automatically issues HART commands to any HART device that is present and enabled in configuration. The response data from these commands is maintained within the internal memory of the RX3i HART module and is made available to the RX3i Controller via input scanning of HART Data, or via the Get Device Information COMMREQ (command 1). An RX3i HART module can be configured to make HART device data available to the RX3i controller via input scanning by using the HART Data Scan Control. With this option, the automatic HART command response data from each device is formatted and written to RX3i reference memory at the HART Data Reference Address. This occurs during the normal RX3i input scan. This option may be disabled. Two modes of automatic data presentation are configurable: “All Data” and “Dynamic Data”. · Dynamic Only periodically executes HART command #3 and provides the resulting PV, SV, TV, and FV variables to the RX3i input reference memory. If HART Slot Variables are enabled, HART command #33 slot variable values are also updated automatically. Dynamic Only data also includes the most current Communication and Device Status. · All Data option provides the same information as the Dynamic Only option, plus additional data from HART commands 0, 12, 13, 15, 16, 48, and 50. During start-up, or after a device configuration changes (as indicated by the "configuration changed" bit on the HART device being set), the RX3i HART module executes HART commands 0, 3, 12, 13, 15, 16, 33, 48, and 50 (All Data mode). In addition, if HART Slot Variables are enabled (Dynamic Data mode), the module periodically re-issues commands #3 and #33. The repetition period at which the Dynamic Data commands are issued depends on the configuration for HART Pass-Through Service Options and on the number of HART devices enabled in a modem group. HART command #59 is issued each time a HART device initializes: it sets the number of preambles to 5. In many applications, the Dynamic Only option should provide all of the needed HART variables. The variable data updates automatically in the input scan data of the HART module (no COMMREQ trigger is needed). If the Dynamic Only data is not sufficient, additional HART data may be accessed automatically using the All Data option. Enabling either the Dynamic Only or All Data option affects the PLC I/O sweep time because of increased input scan data from the module. PACSystems* RX3i System Manual Section 12 GFK-2314T Sept. 2019 Analog Modules with HART Communications 493 If neither scan option provides all the necessary inputs, or if additional control of HART devices is needed, COMMREQs are available that provide additional functionality or replace the automatic input scanning. Three COMMREQs are available. · The Get Device Information COMMREQ (Command 1) returns the same data for a HART device as the All Data scan option; however, this COMMREQ must be reissued in logic to get updates of the variable data. · The HART Pass-Through COMMREQ is capable of executing any HART command including manufacturer-specific commands; however, care must be used to correctly format HART command request and response data, which must be byte-packed and “big-endian” formatted. Instructions are given in this chapter. · The Remote Get Device Information COMMREQ returns the same data for a HART device as the All Data scan option; however, this COMMREQ must be reissued in logic to get updates of the variable data. 11.1.2 Using DO I/O with HART Modules The HART modules fully support the DOIO function block provided only analog channel values and analog diagnostics are to be scanned. However, DOIO will not function under certain conditions when HART devices are
