MVME172-353 PLC工控備件
必須記錄危險(xiǎn)區(qū)域的尺寸和位置以及使用的假設(shè)，以便檢查防護(hù)措施的充分性。如果其他防護(hù)措施與墊子系統(tǒng)一起使用，可能會(huì)影響確保蓋子和格柵與地板表面齊平。無松散碎屑或突起。傳感器墊不得下垂或起伏。沒有鋒利的邊緣。傳感器墊傳感器墊16對(duì)墊的尺寸和位置的要求，如圖11所示。圖11。注意：固定防護(hù)裝置應(yīng)符合EN 953、EN 294和EN 811的要求。首先，確定需要穿過墊系統(tǒng)無障礙進(jìn)入危險(xiǎn)區(qū)域的路線?？紤]所有日常訪問需求，如產(chǎn)品檢查、機(jī)器檢查和調(diào)整、刀具更換和清除堵塞。還應(yīng)考慮過程的視覺觀察。在干預(yù)過程中，考慮機(jī)器附近人員和輔助設(shè)備的空間要求。安全距離計(jì)算對(duì)于使用墊子系統(tǒng)作為組合跳閘和存在感測(cè)系統(tǒng)的應(yīng)用，應(yīng)根據(jù)EN999進(jìn)行計(jì)算。圖12的流程圖顯示了基本步驟。注：如果機(jī)器的設(shè)計(jì)符合該機(jī)器的現(xiàn)有協(xié)調(diào)歐洲“C”型標(biāo)準(zhǔn)，該標(biāo)準(zhǔn)給出了具體公式或最小距離，則應(yīng)優(yōu)先使用EN 999中給出的公式。傳感器墊危險(xiǎn)危險(xiǎn)傳感器墊傳感器墊固定防護(hù)延伸固定防護(hù)箭頭顯示通道17圖12流程圖顯示方法計(jì)算的最小距離是傳感器墊檢測(cè)區(qū)外緣到危險(xiǎn)最近部分的最小水平距離。地面安裝式安全墊的EN 999公式為S=（1600 x T）+1200mm S是最小安全距離，單位為毫米。系數(shù)1600是基于進(jìn)場(chǎng)速度1600mm/S的標(biāo)準(zhǔn)假設(shè)。T是以秒為單位的總停止時(shí)間。
增加的1200mm是EN 999中給出的參數(shù)C，并考慮了步幅長度和手臂伸展。否是否是否否否是C類標(biāo)準(zhǔn)中是否給出了具體公式或最小距離？根據(jù)C類標(biāo)準(zhǔn)確定最小距離使用此最小距離根據(jù)prEN 999中的公式計(jì)算最小距離是否可以達(dá)到此最小距離？最小距離是否允許人員在危險(xiǎn)區(qū)域內(nèi)而不被發(fā)現(xiàn)？使用此最小距離以及根據(jù)風(fēng)險(xiǎn)采取的補(bǔ)充措施使用該最小距離是否可以縮短總體響應(yīng)時(shí)間，或者是否可以縮短參數(shù)C？減少總響應(yīng)時(shí)間和/或減少參數(shù)C使用附加或替代保護(hù)設(shè)備18總停止時(shí)間T由兩部分組成：T=t1+t2 t1是啟動(dòng)傳感功能和輸出信號(hào)開關(guān)設(shè)備處于關(guān)閉狀態(tài)之間的最長時(shí)間。對(duì)于墊子系統(tǒng)，t1=35mS。t2是機(jī)器的響應(yīng)時(shí)間，即在接收到來自墊系統(tǒng)的輸出之后停止機(jī)器或消除風(fēng)險(xiǎn)所需的時(shí)間。計(jì)算中使用的機(jī)器的響應(yīng)時(shí)間需要是最壞情況下的時(shí)間。有些機(jī)器的響應(yīng)時(shí)間不一致，這取決于操作模式、工件的性質(zhì)以及啟動(dòng)停止的操作周期點(diǎn)。如果制動(dòng)器等的磨損會(huì)影響響應(yīng)時(shí)間，則應(yīng)考慮磨損。在某些情況下，可能需要考慮機(jī)器控制系統(tǒng)的進(jìn)一步延遲。計(jì)算示例在本示例中，墊子系統(tǒng)與最壞情況下響應(yīng)時(shí)間測(cè)量為0.485秒的機(jī)器一起使用。使用公式，T=t1+t2=35mS+485mS=520mS=0.520S S=（1600 x 0.520）+1200mm=832+1200mm=2032mm從2032mm到機(jī)器底板邊緣，需要傳感器墊。5.4.2用作周界防護(hù)區(qū)域內(nèi)的存在感測(cè)系統(tǒng)如果危險(xiǎn)周圍區(qū)域完全封閉在防護(hù)周界內(nèi)，prEN 999的要求可能不適用。
The size and location of the hazardous area and the assumptions used must be documented in order to check the adequacy of the protective measures. If other protective measures are used together with the mat subsystem, it may affect ensuring that the cover and grille are flush with the floor surface. No loose debris or protrusions. The sensor pad must not sag or fluctuate. No sharp edges. The requirements of sensor pad 16 on the size and position of the pad are shown in Figure 11. Figure 11. Note: The fixed protective device shall comply with the requirements of EN 953, EN 294 and EN 811. First, determine the route that needs to pass through the mat system to enter the hazardous area unobstructed. Consider all daily access needs, such as product inspection, machine inspection and adjustment, tool replacement, and removal of blockages. Visual observation of the process should also be considered. During the intervention, consider the space requirements for personnel and auxiliary equipment near the machine. Safety distance calculation For applications using the mat subsystem as a combined trip and presence sensing system, it shall be calculated according to EN999. The flowchart in Figure 12 shows the basic steps. Note: If the design of the machine complies with the existing harmonized European "C" standard for the machine, which gives a specific formula or a minimum distance, the formula given in EN 999 shall prevail. Sensor pad Hazard sensor pad Sensor pad Fixed protection Extended fixed protection arrow Display channel 17 Figure 12 Flow chart Display method The minimum distance calculated by the display method is the minimum horizontal distance from the outer edge of the sensor pad detection area to the nearest part of the hazard. The EN 999 formula of ground mounted safety pad is S=(1600 x T)+1200mm S is the minimum safety distance, and the unit is mm. The coefficient 1600 is a standard assumption based on the approach speed of 1600mm/S. T is the total stop time in seconds.
The increased 1200mm is the parameter C given in EN 999, taking into account stride length and arm extension. No No No No No Is there a specific formula or minimum distance in the Class C standard? Determine the minimum distance according to the Class C standard Use this minimum distance to calculate the minimum distance according to the formula in prEN 999 Can you reach this minimum distance? Does the minimum distance allow people to stay in the hazardous area without being found? Can the use of this minimum distance and supplementary measures taken according to the risk reduce the overall response time, or can the parameter C be shortened? Reducing the total response time and/or reducing the parameter C using additional or alternative protective devices 18 The total stop time T consists of two parts: T=t1+t2 t1 is the longest time between starting the sensing function and closing the output signal switchgear. For mat subsystem, t1=35mS. T2 is the response time of the machine, that is, the time required to stop the machine or eliminate the risk after receiving the output from the cushion system. The response time of the machine used in the calculation needs to be the worst case time. Some machines have different response times, depending on the mode of operation, the nature of the piece, and the point at which the operation cycle starts and stops. If the wear of brakes, etc., affects the response time, wear should be considered. In some cases, further delays in the machine control system may need to be considered. Calculation Example In this example, the mat system is used with a machine that has a worst case response time measurement of 0.485 seconds. Using the formula, T=t1+t2=35mS+485mS=520mS=0.520S S=(1600 x 0.520)+1200mm=832+1200mm=2032mm from 2032mm to the edge of the machine floor, sensor pads are required. 5.4.2 The requirements of prEN 999 may not be applicable if the hazardous surrounding area is completely enclosed within the protective perimeter.
