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GNT0164000R0001驅(qū)動電源板
交換機(jī)設(shè)置兩個撥動開關(guān)位于模塊的左上角，用于確定與外部設(shè)備的通信類型。兩個開關(guān)都是用戶可選擇。
1.紙盒/BCD開關(guān)
此切換開關(guān)確定輸出數(shù)據(jù)是否由目標(biāo)設(shè)備作為BCD或二進(jìn)制值。
2.閃光燈激活高/低開關(guān)
此撥動開關(guān)允許為選通輸出數(shù)據(jù)選擇真高或真低。注：I/O映射選擇、BCD/二進(jìn)制開關(guān)設(shè)置端子編號和輸出功能之間的關(guān)系用戶連接到標(biāo)準(zhǔn)螺釘端子排。剛性接線系統(tǒng)允許在不干擾接線的情況下插入或移除模塊。
下圖顯示了如何現(xiàn)場連接裝置。上拉電阻器連接必須在有源設(shè)備端安裝上拉電阻器才能使用B862輸出單元上拉電阻的值取決于連接到數(shù)據(jù)總線，如下所述。每個輸出滿足0.4 V邏輯低時最大16 mA，邏輯高時最小3.3 V。如果超過電流限制，應(yīng)調(diào)整上拉電阻值在規(guī)范范圍內(nèi)；否則，可能會獲得虛假結(jié)果。
下圖顯示了電阻器在設(shè)備上的連接方式
終止對于由16條數(shù)據(jù)線組成的單個設(shè)備，需要16個1k電阻，或，每個數(shù)據(jù)線一個1k電阻。隨著附加設(shè)備添加到數(shù)據(jù)總線上拉電阻的值必須增加1k。換句話說，如果兩個設(shè)備使用時，上拉電阻必須為2k，三個設(shè)備需要3k上拉，并且以此類推，對于每個數(shù)據(jù)，最多8個設(shè)備需要8k上拉線上拉電阻器連接此診斷測試以1/s的速度執(zhí)行，所需時間少于1ms在診斷過程中，輸入無法檢測到低或高狀態(tài)，導(dǎo)致向控制器報(bào)告故障，活動LED閃爍。數(shù)字濾波對所有輸入執(zhí)行，以減少滋擾性故障的發(fā)生。模塊和控制器之間的通信由四個字組成。二單詞包含每個輸入的狀態(tài)，另外兩個單詞包含故障每個輸入的狀態(tài)。在狀態(tài)字中，高或一表示打開條件。在故障狀態(tài)字中，一個高或一個表示相應(yīng)輸入處存在故障。B863模塊不僅讀取24 Vdc輸入，還允許您監(jiān)控通過使用輸入錯誤標(biāo)志，檢查輸入電路的健康狀況。在以下方面例如，網(wǎng)絡(luò)允許您監(jiān)視錯誤標(biāo)志輸入以進(jìn)行維護(hù)和故障排除。如果B863模塊的I/O映射為30001-30004，則寄存器30001和30002是真實(shí)世界的輸入，30003和3004成為錯誤標(biāo)志輸入。
寄存器30003和30004與寄存器40011和40012的比較。
Switch Settings
Two toggle switches are located at the top left of the module and are used to determine the type of communication with external devices. Both switches are user selectable. 1. Bin/BCD Switch This toggle switch determines whether the output data is to be interpreted by the target devices as a BCD or a binary value. 2. Strobes Active Hi/Lo Switch This toggle switch allows selection of either true-hi or true-lo for strobing output data. NOTE: The relation between the I/O map selection, the BCD/binary switch setting Terminal Numbering and Output Functions User connections are made to a standard screw terminal strip. The rigid wiring system permits module insertion or removal without disturbing the wiring. The following illustration shows how to field connect the unit.The B863 module not only reads 24 Vdc inputs, but it allows you to monitor the health of the input circuits through the use of the input error flags. In the following example, networks allow you to monitor the error flag inputs for maintenance and troubleshooting. If the B863 module is I/O mapped as 30001-30004, then registers 30001 and 30002 are the real world inputs, and 30003 and 30004 become the error flag Inputs. Comparison of registers 30003 and 30004 to registers 40011 and 40012.
Pull-up Resistor Connection
Pull-up resistors must be installed at the active device end to use the B862 output module. The value of the pull-up resistor depends upon the number of devices that are attached to the data bus, as explained below. Each output meets 0.4 V maximum at 16 mA for a logic low and 3.3 V minimum at 16 mA for a logic high. If the current limit has been exceeded, the pull-up resistor values should be adjusted within specification; otherwise, spurious results may be obtained. The following illustration indicates how the resistors are connected at the device end. For a single device consisting of 16 data lines, 16 1 k resistors are required, or, one 1 k resistor per data line. As additional devices are added to the data bus, the value of the pull-up resistor must be increased by 1 k. In other words, if two devices are used, the pull-up resistor must be 2 k, three devices require a 3 k pull-up, and so on, with the maximum number of 8 devices requiring 8 k of pull-up for each data line. Pull-up resistor connection This diagnostic test is performed at a rate of 1/s, and takes less than 1 ms. The inability of an input to detect a low or high state during diagnostics, results in the reporting of a fault to the controller, and the flashing of the active LED. Digital filtering is performed on all inputs to reduce the occurrence of nuisance faults. Communication between the module and the controller consists of four words. Two words contain the state of each input, and the other two words contain the fault status of each input. Within the state words, a high, or one indicates a on condition. Within the fault status words, a high, or one indicates a fault at the respective input.
