HIEE410385P201脈沖輸入卡件,工業(yè)卡件
啟用，HART數(shù)據(jù)掃描控制設置為“所有數(shù)據(jù)”或“僅動態(tài)”。由于RX3i CPU的限制，只有輸入掃描大小小于等于256字節(jié)的模塊才能使用DOIO功能塊。HART模塊將在DOIO下正常工作，除非輸入掃描大小超過256字節(jié)（此輸入大小限制可能會在未來版本中增加或消除）。當超過該輸入掃描大小時，任何嘗試將DOIO用于HART模塊輸入或輸出的嘗試都將失敗，并且DOIO功能不會通過功率流。DOIO繼續(xù)正常運行時可啟用的設備的確切數(shù)量取決于所采用的RX3i HART模塊?！τ贏LG628和ALG728，選擇“所有數(shù)據(jù)”時可啟用的HART設備數(shù)量為1，選擇“僅動態(tài)”的設備數(shù)量為5或更少?！τ贏LG626，啟用“僅動態(tài)”的設備數(shù)量為三個。此外，只要啟用任何HART設備并選擇了所有數(shù)據(jù)，DOIO就不會對ALG626起作用。11.1.3使用帶有RX3i模擬HART模塊的手持式校準器通常需要使用手持式HART校準器對現(xiàn)場設備進行維護。RX3i HART模塊充當HART主機，現(xiàn)場設備被視為從設備。當將手持式通信器與HART I/O結合使用時，校準器被視為二級主控器。PACSystems*RX3i系統(tǒng)手冊第12節(jié)GFK-2314T 2019年9月帶有HART通信的模擬模塊494 RX3i HART模塊從屬設備主設備主設備4-20mA回路圖311：使用手持式HART校準器主設備必須啟動與現(xiàn)場設備的通信。設備只需回復適當?shù)捻憫纯?。任何給定信道都可以同時連接一個主信道、一個輔助主信道（手持式校準器）和一個從信道。11.1.4 HART傳遞功能HART傳遞是指通過PLC系統(tǒng)雙向傳輸HART命令和響應的術語。所討論的HART通信是連接到具有HART功能的模擬I/O模塊的HART設備和監(jiān)測站之間的通信。I/O和監(jiān)控站必須連接到同一PLC。有關更多信息，請參閱PACSystems HART直通用戶手冊GFK-2929。兼容的PACSystems*PLC CPU支持兩種獨立且獨特的HART直通技術：·PACSystems現(xiàn)場設備工具（FDT）HART設備類型管理器（DTM）和·PACSystems HART多路復用器。這兩種技術都支持連接到具有HART支持的模擬IO模塊的HART設備。模擬I/O模塊可位于以下位置之一：1）RX3i CPU機架，2）RX3iPROFINET掃描儀機架（即，在PNS001或PNS101模塊控制下的I/O機架），或3）RX3i-PROFINET CEP遠程分接，始終由CEP001模塊控制。PACSystems*RX3i系統(tǒng)手冊第12節(jié)GFK-2314T 2019年9月帶有HART通信495的模擬模塊支持PROFINET機架要求監(jiān)控RX3i PROFINET IO控制器（PNC001）位于RX3i CPU機架中。使用冗余IP連接支持熱備用CPU冗余和PROFINET I/O的操作。以下RX3i模擬模塊支持
enabled and the HART Data Scan Control is set to either All Data or Dynamic Only. Due to RX3i CPU limitations, only modules with input scan sizes of 256 bytes or less can use the DOIO function block. HART modules will function normally with DOIO except when the input scan size exceeds 256 bytes (this input size limitation may be increased or eliminated in future releases). When this input scan size is exceeded, any attempt to use DOIO for HART module inputs or outputs will fail, and the DOIO function will not pass power flow. The exact number of devices that can be enabled while DOIO continues to operate normally depends on the RX3i HART module employed. · For ALG628 and ALG728, the number of HART devices that can be enabled with All Data selected is one, and the number of devices with Dynamic Only selected is five or fewer. · For ALG626, the number devices enabled with Dynamic Only selected is three. Furthermore, DOIO will not function at all for ALG626 whenever any HART devices are enabled with All Data selected. 11.1.3 Using a Hand-held Calibrator with RX3i Analog HART Modules It is often necessary to perform maintenance on field devices using a hand-held HART calibrator. The RX3i HART module behaves as a HART master and the field device is considered the slave. When using a hand-held communicator in conjunction with the HART I/O, the calibrator is considered a secondary master. PACSystems* RX3i System Manual Section 12 GFK-2314T Sept. 2019 Analog Modules with HART Communications 494 RX3i HART Module Slave Device Secondary Master Primary Master 4-20mA Loop Figure 311: Use of Hand-Held HART Calibrator The master must initiate the communication with the field device. The device simply replies with an appropriate response. Any given channel may have a master, a secondary master (hand-held calibrator), and a slave connected simultaneously. 11.1.4 HART Pass-Through Functionality HART Pass Through is the term given to the bidirectional tunneling of HART commands and responses through a PLC system. The HART communications in question are between those HART devices connected to HART-capable analog I/O modules and a monitoring station. Both the I/O and the monitoring station must be connected to the same PLC. For further information, refer to the PACSystems HART Pass Through User Manual, GFK-2929. Compatible PACSystems* PLC CPUs support two independent and distinct HART Pass Through technologies: · PACSystems Field Device Tool (FDT) HART Device Type Managers (DTMs) and · the PACSystems HART Multiplexer. Both technologies support HART devices connected to analog IO modules with HART support. The analog I/O modules may be located in one of the following: 1) an RX3i CPU rack, 2) an RX3i PROFINET Scanner rack (i.e. an I/O rack under the control of a PNS001 or PNS101 module), or 3) an RX3i PROFINET CEP remote drop, which is always controlled by a CEP001 module. PACSystems* RX3i System Manual Section 12 GFK-2314T Sept. 2019 Analog Modules with HART Communications 495 Support for the PROFINET racks requires that the supervising RX3i PROFINET IO Controller (PNC001) be located in the RX3i CPU rack. Operation with Hot Standby CPU Redundancy and PROFINET I/O is supported using a redundant IP connection. The following RX3i analog modules support
