DeviceNet的故障排除.docx

DeviceNet的故障排除 DeviceNet will not function correctly if design rules are not followed. DeviceNet的将无法正常工作，如果不遵循的设计规则。 Even a Network previously thought 即使是以前认为的网络 to be functioning correctly may begin to exhibit abnormal or anomalous operation due to incorrect system 要正确运作可能会开始表现出异常的运作不正常或因不正确的系统 design. 设计。 The following are tips to help locate and correct these abnormalities. 下面的提示，以帮助查找和纠正这些异常。 For specific DeviceNet System Installation Information. 对于特定的DeviceNet系统的安装信息。 Please refer to publication DN-6.7.2 entitled 请参见出版物的DN - 6.7.2题为 DeviceNet Planning and Installation Manual. “DeviceNet的规划和安装手册”。 Manuals can be ordered via the Automation Bookstore on the Internet at 手册可以下令在互联网上通过自动化书店“ or your local Allen-Bradley distributor or sales office. “或您当地的Allen - Bradley分销商或销售办事处。 Termination Resistors: 终端电阻： A termination resistor equal to 121 Ohms 1% , 1/4W must be attached at each end of the Trunk cable. 终止121欧姆的电阻等于1，碳膜必须附加在每个月底的干线电缆。 The The resistors must be connected across the Blue & White wires of the DeviceNet cable. 电阻必须跨接电线的DeviceNet电缆的蓝与白。 Resistor connection can be verified by disconnecting DeviceNet power and measuring the resistance across 电阻连接可以验证DeviceNet电源断开，并通过测量电阻 the Can_H & Can_L lines (Blue & White Wire). 在Can_HCan_L线（蓝与白线）。 This reading should be approximately 60 Ohms. 该读数应大约60欧姆。 Important: The DeviceNet network will not operate correctly without terminating Resistors. 重要事项：在DeviceNet网络不会正确操作电阻不终止。 Termination 终止 resistors can be ordered from your local Allen-Bradley Distributor using the part number 1485A- 电阻可从网上订购当地的Allen - Bradley经销商使用 零件编号1485A - C2 . C2的 。 Page 2 第2页 Network Grounding: 网络接地： The DeviceNet cable must by grounded at only one location. 在DeviceNet电缆必须接地的位置只有一个。 This should be done closest to the center of the 这应该是做最接近的中心 network. 网络。 connect the network Shield and Drain wire to an earth ground using #8 AWG wire up to a 连接网络屏蔽和排水管线到接地使用8 AWG导线多达 maximum 3m ( 10Ft ) in length.Also connect the V- conductor ( Black Wire) of the network trunk cable and 最大3米）在length.Also（10英尺连接的V -导体的网络干线电缆（黑线）和 the DC ground of the power supply to this ground connection. 直流接地的接地连接的电源这一点。 Power Supplies: 电源： DeviceNet requires 24VDC. DeviceNet的需要24V直流。 Use a power supply rated 24VDC (+/- 1% ). 使用额定24V直流电源（+ / - 1）。 Make sure the power supply has 确保电力供应 its own current limit protection. 它自己的电流限制保护。 Provide fuse protection for each segment of the cable system. 熔断器保护提供电缆系统为每个段。 DeviceNet DeviceNet的 requires a power supply to have a rise time of less then 250mS to within 5% of its rated output voltage. 需要一个电源输出电压范围内有5上升到其额定一时间小于250毫秒。 The The power supply must be sized correctly to provide each device with its required power. 电源必须正确地提供各种大小的动力装置，其所需。 Important: The power supply should be used to power the DeviceNet network only.When multiple power 重要事项：应使用电源供电DeviceNet网络only.When多个电源 supplies are required, verify that the V+ connection is broken between the supplies. 供应需要，验证了V +连接用品打破之间。 Please refer to the 请参阅“ DeviceNet Planning and Installation Manual for more specific installation procedures. DeviceNet的规划和安装程序手册“的更具体的安装。 Examine the System Design of the Installation 检查安装系统的设计 Walk the network if possible to determine the actual layout. 漫步在网络如果能够确定实际的布局。 ( Make a sketch of the network ) （使网络示意图） Check number of nodes 检查节点数 Check cumulative drop length 检查长度累计下降 Check individual drop lengths 检查个体长度下降 Check branched drop length 检查支下降的长度 Check total trunk length, including long drop near the ends 检查总干线长度，包括附近的长长的跌落完 Check the termination location and measure the terminators 检查终止位置，测量的终结 Check the power supply cable length and gauge 检查电源线的长度和压力表 Check for one, and only one, earth ground of the V- and shield 检查一，且只有一个地球地面的V -和盾牌 Break the combination shield/V- connection to frame ground and verify 1.0 Mohm to frame ground 打破框架组合shield/V-连接到地面，并验证 1.0兆欧到帧地 Check for one and only one V- to shield connection 检查一个且只有一个V型屏蔽连接 Break the shield/V- connection at the power supply and verify 1.0 Mohm shield to V- with 24VDC off 打破连接电源shield/V-在和验证 1.0兆欧盾至V与24V直流关闭 Check for shorts of CAN- and/or CAN+ to shield or V- verify with an OHM meter 检查的CAN短裤的CAN和/或+来屏蔽或V -验证与一欧姆表 Check the length and gauge of the earth ground connection 检查的长度和规范的接地连接 Check total power load and its distribution points 检查总用电负荷及分布点 Page 3 第3页 Check the Power 检查电源 Check trunk and drop current limits 检查干线和降电流限制 Check type (size and length) of cable bringing power into the trunk 检查类型和长度）的电缆（主干力量的大小将进入 Measure the 24V supply at the middle and ends of the network 测量中的24V电源和网络两端 Consider spot checking the power for noise with an oscilloscope 考虑抽查示波器噪声功率为一 The 24 VDC Network Power for DeviceNet Must be for the DeviceNet network only. 24伏直流电源用于DeviceNet网络必须为DeviceNet网络而已。 Check the Wiring 检查接线 Check lead dress in junction boxes 检查接线盒穿着铅 Check that connectors are screwed together tightly 检查接口是否拧紧在一起 Check that glands are screwed tightly 检查腺体拧紧 Check for foreign material (electrical tape, RTV, etc.) in glands 检查是否有异物磁带，广播电视大学等），腺（电 Check that nodes are not touching extremely hot or cold surfaces 检查节点不接触极热或极冷的表面 Check that cables are kept a few inches away from power wiring 检查电缆是否远离电源线几英寸 Check that cables are not draped on electric motors, relays, contactors or solenoids 检查电缆没有披上电磁铁电动马达，继电器，接触器或 Check that cables are not constrained so as to place excessive tension on connectors 检查电缆没有约束，以连接器上的过度紧张的地方 Wiggle connectors to provoke intermittent failures 威格尔连接挑起间歇性故障 Check the Scanner Configuration 检查扫描仪配置 Verify the scanlist 验证扫描列表 Baud Rate 波特率 Node Address 节点地址 Series/Revision of the 1747/1771-SDN scanner 系列/修改的1747/1771-SDN扫描仪 Check the Nodes 检查节点 Drop 24V supply, re-power and reset the scanner to initialize the network 降24V电源，重新启动并复位初始化网络扫描仪 Examine the scanner display codes to identify problem nodes. 检查扫描仪显示的代码，以确定问题的节点。 ( Reference the SDN manual for a description of these cod （参考手册中的这些化学需氧量供需为一个描述 es ) 胚胎干） At problem nodes 在有问题的节点 Blinking GREEN means the node is not being allocated by the scanner 闪烁 绿色表示该节点没有被分配的扫描仪 Check that the node is in the scan list 检查节点在扫描列表 Check that the scanner is not bus off 检查扫描仪是不是总线关闭 Check if connection is timing out 检查连接超时 Page 4 第4页 Blinking RED means no communication 闪烁的 红色表示没有沟通 Check for missing power on all nodes 检查所有节点的电源失踪 Check if all other nodes are disconnected 检查所有其他节点都断开 Check node baud rate ( Bad baud rate does not always cause buss off ) 检查节点波特率（波特率错误并不总是导致巴斯关闭） Check scanner, if it is bus off ( code 91 ) communications connection with the node has then timed out. 检查扫描仪，如果是节点总线关闭（代码91）的通讯连接，然后与已超时。 Recycle 24V supply and then reset scanner. 回收24V电源，然后重新扫描仪。 If scanner goes bus off again, The problem is some combination of 如果扫描仪云巴士再次起飞，但问题是一些组合 Defective node 有缺陷的节点 Node baud rate 节点波特率 Bad topology 坏的拓扑结构 Bad connections 接触不良 Bad scanner 坏扫描仪 Bad power 坏电源 Bad grounding 接地不良 Bad electrical noise 坏电噪声 Solid RED light at power-up means two nodes have the same address Solid RED after allocation means bus off Check baud rate -在红色上固体光功率是指两个节点具有相同的地址分配方式固红继率总线关闭检查波特- If the problem persists, replace node ( Be sure to set the address and baud rate on the replacement node ) 如果问题仍然存在，替换节点（一定要设置地址和更换节点波特率上） If the symptoms persist 若症状持续 Replace T-Tap 取代T -塔 Check topology 检查的拓扑结构 Check power for noise with oscilloscope or power disturbance analyzer 检查电源分析仪与示波器或电源噪声干扰 Page 5 第5页 Points to Remember 你需要记住的 Pressing the reset button on the scanner does not reset the network 按复位按钮，扫描仪不重置网络 Cycling the rack power does not reset the network 骑自行车机架功率不重置网络 When using a DeviceLink a bus off (solid RED ) condition can only be cleared by cycling the 24V power 当使用DeviceLink条件总线关闭（纯 红色 ）只能清除循环的24V电源 Cycling power on the network will cause the scanner to go bus off 骑自行车网络接通会导致扫描仪去总线关闭 DeviceNet 9000 bus off (solid RED ) condition can be cleared by cycling the 24V power or by pressing the program button for 9000的DeviceNet总线关闭（纯 红色 ）条件可用于清除循环的24V电源或按程序按钮 several seconds 几秒钟 Extreme care must be given to the task of setting initial addresses and baud rates because one incorrect node address or incorrect 必须特别小心给予利率任务设置初始地址和波特率，因为一个不正确或不正确的节点地址 baud rate will cause other nodes to appear to be bad (solid RED ). 波特率将导致其他节点似乎是坏的（纯 红色 ）。 If the scanner is bus off (code 91), nodes will not reallocate (flashing GREEN or RED ) even if they are functioning correctly 如果扫描仪是总线关闭（代码91），节点将不会重新分配（闪烁的 绿色或红色 ），即使它们运行正常 DeviceNet manager and a 1770-KFD can be used to identify the functioning nodes on the network. DeviceNet的经理和1770 -科威特消防局可用于识别网络上的运作节点。 If a node goes bus off (solid RED for DeviceLink), and is replaced and still goes bus off, the problem is not the node but rather 如果一个节点出现 ） 巴士优惠（纯 红色 DeviceLink，而被替换，但是她总线关闭，问题是不是节点，而是 the setting of the address or baud rate OR a network wide problem related to topology, grounding, electrical noise or an 拓扑结构设置的地址或波特率或网络范围内的问题有关，接地，电气噪音或一 intermittent node 间歇性的节点 MORE TROUBLESHOOTING TIPS 更多疑难排解提示 Try to distinguish, as soon as possible, a device problem from a media problem. 试图分辨，尽快，媒体问题的设备问题从。 Try to reduce the system to the smallest size which still exhibits the problem. 尽量减少系统的最小尺寸仍然展品的问题。 This can be done by removing nodes, drops, taps, or lengths of trunk. 这可通过删除节点，滴，水龙头，或树干长度的。 Use substitution where possible to rule things out, But be careful! 使用替代排除在可能的事情了，但要小心！ Real Case: 真实个案： Product A works with Product B and not with Product C. 产品A的工程与产品B和C不与产品 We conclude that the problem is with Product C - WRONG! 我们的结论是，问题C是与产品-错误！ The problem was with product A., Product C was operating correctly, But just happened to be susceptible to the fault in 问题是与产品A，产品C是运行正常，但正好是容易受故障 the product A. 该产品A Do not assume to much! 不要以为到了！ If you suspect a media problem, inspection is always a good first step. 如果您怀疑媒体的问题，检查始终是一个良好的开端。 Verify lengths, topology, the proper termination ( 验证长度，拓扑结构，正确的终止（ VERY IMPORTANT ). 非常重要 ）。 Most of all check connections.最重要的是检查连接。 Opens or shorts may be the biggest problem. 打开或短裤可能是最大的问题。 On an idle bus ( without traffic ) voltages can indicate problems. 在总线空闲（没有交通）电压可以显示的问题。 CAN_L and CAN_L and CAN_H should be about 2.5 to 3.0 volts relative to V-. CAN_H应约2.5至3.0伏特相对于V -。 If there is traffic, CAN_L will be a little lower, CAN_H a little higher. 如果有交通，CAN_L会有点低，CAN_H高一点。 Use an OHM meter to check resistance between CAN_H and CAN_L when idle. 使用欧姆表检查之间的电阻CAN_H and空闲时CAN_L。 This should be about 60 ohms (two 120 这应该是60欧姆（二120 ohm terminators in parallel). 并联欧姆终端）。 This value may be as low as 50 ohms if there are many nodes attached. 此值可低至50欧姆如果有很多附加的节点。 Make sure all wires 确保所有电线 are well attached to the right places. 有良好附着在适当的地方。 The V+ level, relative to V-, should always be between 11 to 25 volts. 采用V +水平，相对于V -时，应始终在11到25伏。 One common problem people run across is incorrect setting of baud rates and node addresses. 一个常见的问题是人遇到过的节点地址设置不正确的波特率和。 Always verify the nodes 始终验证节点 address and baud rate before installing it on a network. 地址和波特率网络上，然后再安装上。 and try not to change a nodes baud rate while on the network. 并尽量不要改变一个节点的波特率，而在网络上。 Do 做 all baud changes on a point to point only connection. 波特在一个地方所有的变化只连接点。 Page 6 第6页 Ground Loops 接地回路 Before trying this make sure only one side of the shield is grounded. 尝试此之前只有一个盾牌，确保一方的接地。 Use the oscilloscope to determine if there are ground loops in your system.You should NOT see 60 Hz or Harmonics in 使用示波器，以确定是否有接地回路中的谐波在system.You不应该看到60 Hz或 your signal. 你的信号。 Assuming you use DC coupling on the oscilloscope you should see. 假设你使用直流耦合应该看到在示波器上你. 2.8 VDC offset on both Can_High & Can_Low NO Sinusoidal signal ;ie 60 Hz components. 2.8 VDC信号抵消都Can_High及Can_Low无正弦，即60赫兹的组件。 DeviceNet Cable DeviceNet电缆 BLACK 黑色 Common 通用 - COM - COM的 BLUE - 蓝 - Signal Low 信号低 - CAN_L - CAN_L Uninsulated 无绝缘 Shield 盾 - SHIELD -盾构 WHITE 白 Signal High 信号高 - CAN_H - CAN_H RED 红 Power Supply 电源 - VDC+ -直流+ GREEN 绿色 Chassis Ground 机箱接地 - EARTH GROUND -接地 DeviceNet Connector DeviceNet连接器 Examining the connector with the keyway pointing down. 检查向下连接器与键槽指点。 Number the pins starting at the pin right most to the keyway 引脚数起在最右边的脚键槽 (1) and continue counter clockwise until you reach pin (5). （1），继续逆时针旋转，直到你达到引脚（5）。 PIN 1 PIN码1 SHIELD 盾构 GREEN 绿色 PIN 2 引脚2 VDC+ 伏+ RED 红 PIN 3 引脚3 COM COM的 BLACK 黑色 PIN 4 引脚4 CAN_HIGH CAN_HIGH WHITE 白 PIN 5 密码5 CAN_LOW CAN_LOW BLUE 蓝 Page 7 第7页 DeviceNet Scanner Status / Error Codes DeviceNet扫描仪状态/错误代码 The bicolor ( GREEN / RED ) module status indicator displays device status. 在双色（ 绿色 / 红色 ）模块的状态指示灯显示设备状态。 It indicates whether the device has power这表明该设备是否有电 and is functioning properly. 并且运作正常。 Indicator is Then Take this action 指示灯然后采取这一行动 -|-|-| -|- -|-| Off | There is no power applied to the device. 关|存在的设备没有通电。 | Apply power. |接通电源。 | | | | Green 绿 | The device is operating in normal condition.| Do nothing. |该设备在正常运行条件。|什么都不做。 | | | | Flashing Green 闪烁 绿色 | The device needs configuring. |该设备需要配置。 | Configure the device. |配置设备。 | | | | Flashing Red 闪烁的 红色 | There is an invalid configuration. |有一个无效的配置。 | Verify dip switch |验证DIP开关 | | settings. | |设置。 | | Check configuration | |检查组态 | | setup. | |设置。 | | | | Red 红 | The device has an unrecoverable fault. |该器件具有一个不可恢复的故障。 | Replace the module. |更换模块。 -|-|-| -|- -|-| The network status indicator is a bicolor ( GREEN / RED ) LED. 该网络是一个双色状态指示灯 （ 绿色 / 红色 ）领导 。 The following table provides下表提供 troubleshooting information about communication links. 故障排除链接信息沟通。 Indicator is Then Which Indicates Take this action 指标是则表明采取这项行动 -|-|-|-| -|-|- -|-| Off | The device has no power or | The channel is |Power-up the scanner, 关|设备没有权力或|该频道|电扫描仪， | the channel is disabled for | disabled for |provide network power |通道已禁用|为残疾|提供网络力量 | communication due to bus off| DeviceNet |to channel, and make |通讯由于关闭巴士| DeviceNet的|频道，并 | condition, loss of network | communication |sure channel is |条件，网络损失|通信|肯定通道 | power, or has been | |enabled in both the |电源，或已| |启用中 | intentionally disabled. |故意禁用。 | |scanner configuration | |扫描仪配置 | | |table and module command | | |表和模块命令 | | |word. | | |字。 -|-|-|-| -|-|- -|-| Flashing |The two-digit numeric display| The channel is |Configure scan list 闪烁|两位数的数字显示|该频道|配置扫描列表 Green 绿 |for the channel indicates an | enabled but no |table for channel |频道的指示|启用，但尚未|频道表 |error code that provides more| communication is |to add devices |错误代码，提供更多|通信|添加设备 |information about the | occurring | |信息关于|发生| |condition of the channel | | |条件的通道| | -|-|-|-| -|-|- -|-| Solid Green | Theres normal operation |All slave devices in| 纯 绿色 |有正常的操作|从器件在所有| | |the scan list table | | |扫描列表表| | |are communicating | Do Nothing | |是沟通|无为 | |normally with the | | |通常使用| | |scanner | | |扫描仪| -|-|-|-| -|-|- -|-| Solid Red 纯 红色 |The communications channel |The scanner may be |Reset module. |通信通道|扫描仪可能会|复位模块。 If 如果 |has failed.The two digit |defective. |有failed.The两位数|缺陷。 |failures continue, |失败继续下去， |numeric display for the | |replace module. |用于数字显示器| |更换模块。 |channel displays an error | | |频道显示错误| | Page 8 第8页 |code that provides more | | |代码，提供更多| | |information about the | | |资讯的| | |condition of the channel | | |条件的通道| | -|-|-|-| -|-|- -|-| Flashing Red |The two-digit numeric display|At least one of the |Examine the failed 闪烁的 红色 |两位数的数字显示|一体的，至少|检查失败 |for the channel display an |slave devices in the|device and check the |为通道显示|在从设备|设备和检查 |error code that provides more|scanners scan list |scan list table |错误代码，提供更多|扫描仪的扫描列表|扫描列表表 |information about the |table has failed to |for accuracy. |的信息|表格未能|的准确性。 |condition of the channel. |条件的通道。 |communicate with the| |沟通与| | |scanne