產(chǎn)品內(nèi)容介紹
1756-L63/B數(shù)控模塊
輸入范圍和輸出數(shù)據(jù)限制如下表所示，數(shù)據(jù)可以是原始二進(jìn)制或轉(zhuǎn)換后的二進(jìn)制總體安排在允許的2%最大超范圍裕度內(nèi)，沒有錯誤代碼向PLC報(bào)告。
輸入范圍和輸出數(shù)據(jù)限制診斷的通信診斷程序在五秒鐘的初始化期間執(zhí)行隨后通電。診斷例程也在并發(fā)等待狀態(tài)期間運(yùn)行執(zhí)行A/D轉(zhuǎn)換。系統(tǒng)診斷包括：RAM檢查、ROM檢查、UART檢查以及檢查配置開關(guān)的合法性設(shè)置和監(jiān)控自動校準(zhǔn)的能力。如果模塊未能通過內(nèi)部診斷，將重試兩次。如果其中之一成功，臨時(shí)故障被視為軟故障，不會報(bào)告給PC，但模塊系統(tǒng)繼續(xù)不間斷處理。
如果模塊出現(xiàn)故障診斷三次后，系統(tǒng)進(jìn)入加電復(fù)位狀態(tài)。轉(zhuǎn)換設(shè)置和監(jiān)視器超出范圍需要仔細(xì)檢查。
由于模塊接收來自現(xiàn)場的瞬時(shí)數(shù)據(jù)，但將平均數(shù)據(jù)發(fā)送到PC，瞬時(shí)RB格式中小于0或大于4200的數(shù)據(jù)被視為超出范圍。
這樣的數(shù)據(jù)將被強(qiáng)制（鉗制）為0000（小于范圍），4200（大于范圍）價(jià)值觀但是，如果條件存在的時(shí)間少于總平均時(shí)間。在這種情況下，該格式表示平均值超出范圍。其平均值為固定值；
平均值可能超出范圍，也可能不超出范圍
紅色OUT-OF-RANGE（超出范圍）燈將只要平均值中包含超出范圍的數(shù)據(jù)樣本，則保持ON。
雙列直插式組件開關(guān)銀行A高速模擬輸入模塊可以設(shè)置為五個輸入電壓中的任何一個或DIP開關(guān)的電流范圍。您還可以從七個時(shí)段中進(jìn)行選擇數(shù)字濾波；允許瞬時(shí)電壓樣本成為移動平均線的一部分。DIP開關(guān)還將模塊設(shè)置為4或8電路模式和二進(jìn)制或十進(jìn)制輸出。
為了便于討論，我們將指定上列DIP開關(guān)組A（DIP SwA）和下列B（DIP Sw-B）。
這些交換機(jī)通過位于模塊后部。
下圖顯示了從模塊后部看到的下傾開關(guān)-A。蘸Sw-A用于選擇輸入范圍。
Dip Switch Bank A-Normal Operation SW-A（雙列直插式開關(guān)組A-正常操作SW-A）設(shè)置分別適用于8和4輸入配置的所有輸入范圍，如下表所示。除輸入范圍外，SW-A還有兩個功能
背景開關(guān)A7對于8路配置為ON，對于4路配置為OFF開關(guān)A8必須接通才能正常工作
Input Ranges and Output Data Limits
As shown in the following table, data can be in either raw binary or converted binary format. Within the 2% maximum over-range margin allowed, no error code is reported to the PLC. Input Ranges and Output Data limits Diagnostic Communications Diagnostic procedures are executed during the five second initialization period following power--up. Diagnostic routines are also run during wait states concurrent with executing A/D conversions. System diagnostics are: RAM checks, ROM checks, UART checks, as well as checking the legality of configuration switch settings and monitoring the ability to autocalibrate. If the module fails to pass an internal diagnostic, two retries are made. If either one succeeds, the temporary failure is considered a soft failure and is not reported to the PC but the module system continues processing uninterrupted. If the module fails the diagnostic three times, the system goes into a power--up reset condition. switch settings and monitor Out--of--Range requires careful examination. Since the module receives instantaneous data from the field but sends averaged data to the PC, instantaneous data less than 0 or greater than 4200 in RB format is considered out-of-range. Such data will be forced (clamped) to 0000 for under--range and 4200 for over-range values. However, the averaged data will not necessarily be out-of-range if the condition existed for less time than the total averaging period. In this case, the format indicates at least one of the instantaneous data samples in the average is out of range. Its value for averaging purposes is the clamped value; the average may or may not be out of range. The red OUT-OF-RANGE light will remain ON as long as an out-of-range data sample is included in the average.
Dip Switch Bank A
The high speed analog input module can be set for any of the five input voltage or current ranges by means of DIP switches. You can also select from seven periods of digital filtering; a feature which allows an instantaneous voltage sample to become part of a moving average. The DIP switches also set the module for 4 or 8 circuit mode and binary or decimal output. For discussion purposes, we will designate the upper DIP switch bank, A (DIP SwA) and lower bank, B (DIP Sw-B). These switches are accessed through ports at the rear of the module. The following illustration shows DIP Sw-A as seen from the rear of the module. Dip Sw-A is used for selecting an input range. Dip Switch Bank A-Normal Operation SW-A settings for all input ranges for both 8 and 4 input configurations, respectively, are shown in the following tables. SW-A has two functions in addition to input range setting Switch A7 is ON for an 8-circuit configuration and OFF for a 4-circuit configuration Switch A8 must be ON for normal operation
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