If the polarity of load cell signals is not correct, the cabling has to be checked. 如果测压单元信号极性不对，就必须检查电缆。 Tension Electronics 张力传感器
Intermittent loss of a function usually due to a fault in the tension electronics.
张力测量装置上的信号时有 Instability problems seldom originate from the tension electronics. 不稳定的问题很少因传感器引起。
Faults in devices connected to the tension electronics may affect its operation. 和传感器连接的装置的故障可能影响其操作。
6.6 Error and Warning Messages in PFEA 111/112 PFEA111/112的错误和警告信息 An ERROR is something that causes the electronics to function incorrectly. ERROR导致传感器功能错误。
A WARNING is something that might affect the accuracy of the measurement. WARNING可能影响测量精度。
When a warning or an error occurs, a warning or an error message is displayed on the Operator Panel and the “status” indication turns from green to red.
当警告或错误出现，其信息在操作面板显示同时“状态”从绿变红。 When √ is pressed the message disappears from the display. 当√按下信息将从显示器消失。
If the problem that activated the warning or error message has disappeared the “status” indication turns to green.
如果导致警告和错误信息的问题已经消失，“状态”变绿。
If the error or warning remains the “status” indication is red. Use the DOWN to step to the last operator menu, where you can read the error or warning message.
如果错误或警告仍然是红，使用DOWN到主菜单，那儿您可以读到错误或警告信息。 6.6.1 Error Messages 错误信息 The following errors can be detected: 下列错误可以忽略：
? Flash (memory) error闪动
? EEPROM (memory) error存储器错误 ? Supply error供给错误
? Load cell excitation error测压单元激发错误
See Section 6.8 Warning and Errors Detected by the Tension Electronics. 6.6.2 Warning Messages 警告信息 The following warning can be detected: 下列警告信息可忽略：
? Profibus communication problem Profibus通讯问题 ? Synchronization problem 同步问题
See Section 6.8 Warning and Errors Detected by the Tension Electronics. 参阅6.8章节由传感器发现的警告和错误。
67 Fault Symptoms and Measures 故障症状和调节 General remark: 一般说明
If the free (unscreened) cable length exceeds 0.1 m (4 in.) the individual pairs of power and signal
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conductors must be twisted.
如果非屏蔽电缆的长度超过0.1m单独的一对电源和信号必须缠绕在一起。
Free length exceeding 1.0 m can cause unstable zero point or incorrect absolute measurement value. 长度超过1.0m的非屏蔽电缆可能导致不稳定的零点或不正确的绝对测量值。
Table 6-1 fault symptoms and measures
表6-1 故障症结和措施
Fault symptom故障症结 measures措施
Noisy signals - Check that cable shields are connected to earth according to cable diagram. 噪音信号 - Proximity to noisy cables can cause interference problems. 检查电缆护罩依照图表连接到地。
接近噪声电缆可能导致相互干扰的问题。
Unstable zero point - Check that cable screens are not connected in both ends. 不稳定的零点 检查电缆屏蔽没有两端相连。
- check that cable between load cell and electronic has diagonal pairs, one pair for signal circuit and one par for excitation circuit, see figure 2-2. 检查测压单元和传感器之间的电缆有一定的角度。一路信号回路和一个同样的激励回路。
- Check, if a junction box is installed, that load cell signal and load cell
excitation between junction box and electronics are routed in separate cables.
如果一个接线盒已经安装，测压单元信号和激励在接线盒和传感器之间选用独立的电缆。
- Check, if two or more IP 20 units are mounted close to each other in the
same cabinet, that they are synchronized (cable for synchronizing the units, see cable diagram and section 2.4.1.3 synchronization). 如果两个或更多IP20单元在相同的橱柜里安装，那么他们是同步的。
Display and LED If the Operator panel display is not illuminated and the “Power” and
Indicators are not “Status” indications on the Operator Panel are “OFF”, check the following: Illuminated 如果操作面板显示器不亮，电源和状态指示关闭，检查以下：
显示器和LED - Check that the cables are correctly connected to the electronics power 指示不亮 supply.
检查电缆正确的连接到传感器的电源提供端。
- Check that the power supply connected to the electronics is correct. 检查电源连接到传感器是正确的。
- Check that the power switch is “ON” (inside the IP 65-version (NEMA 4)
enclosure).
确保电源开关处在开的位置。
- If power supply SD 82x is used as power supply for PFEA 111/112 IP
20-version (unsealed), check that the mains voltage selection switch on SD 82x is set to correct position (115 or 230) corresponding to the connected mains supply voltage.
如果PFEA 111/112 IP 20- version的电源由SD82x提供，检查主电压开关在正确位置接通。
- Further testes are described in Section 6.8.1.3 Supply Error.
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更深的测试在6.8.1.3节里提供。
No signal when load 1. Check that cables to the electronics are correctly connected. is applied 检查到传感器的电缆是正确连接的。
负载提供而没有信号 2. Check that the load cells are connected with correct polarity. If not, the load cell signals cancel out each other. This is displayed on the operator panel as described below:
检查压头的极性是否正确，如果接反，信号将相互抵消，操作显示屏将显示如下信息：
a. The sum signal (A+B) is low 和信号低
b. The difference signal (A-B) is high 差信号高
c. The output signal of the individual load cells have opposite signs
(polarity) when a force is applied on the middle of the roll. 当有一个力施加在辊中时，各个测压单元的输出信号有相对极性。 To check load cell signal polarity, see section 3.9 Checking Load Cell Signal Polarity.
检查测压单元信号极性，参照3.9节。
For connection the load cells to give positive signals for increased web tension, see cable diagram for the installed load cell type.
为测压单元提供正电信号来增加张力，依照图表安装测压单元。
3. Switch off the tension electronics and measure the cable resistance in the load cell signal circuit between terminals X 1:5 and X 1:6 and between X 1:9 and X1:10.
关闭传感器测量测压单元信号回路X1:5同X1:6和X1:9同X1:10之间电缆的电
阻。
a. The resistance is >25 ohm: 电阻大于25欧姆
Check cabling and load cells. 检查；接线端子排和测压单元 b. The resistance is <25 ohm: 电阻小于25欧姆 Check the mechanics. 检查结构
6.8 Warning and Errors Detected by the Tension Electronics 由传感器检测到的警告和错误 6.8.1 Errors错误
6.8.1.1 Flash Memory Error 闪动内存错误
? Replace PFEA 111/112 更换PFEA 111/112
6.8.1.2 EEPROM Memory Error 存储器错误
? Replace PFEA 111/112更换PFEA 111/112
6.8.1.3 Supply Error 供给错误 IP 20-version (unsealed):
When the PFEA 111/112 is connected to the 24VDC power supply the voltage between terminals X1:1 and X1:2 should be 18-36V.
当PFEA 111/112接在24VDC电源上，X1:1和X1:2之间的电压应该为18-36V。 1. If the voltage is lower than 18V:
如果电压低于18V：
- Check the power supplies rating. Rating should be 18-36VDC. 检查电源提供等级。等级应该为18-36VDC。
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- Check that the power supply has sufficient capacity. See power requirements in section
2.6.2 Power Unit.
检查电源有足够的来源。在2.6.2章节参照电源要求。
2. If the power supply has sufficient capacity, check cabling and cable resistance between power
supply and PFEA 111/112.
如果电源有足够来源，检查接线端子排和电源同PFEA111/112电缆之间的电阻。
3. If power supply and cabling are correct, the tension electronics is probably defect. Replace
PFEA 111/112.
如果电源和接线端子排正确，传感器可能损坏。更换PFEA111/112。 IP 65-version (NEMA 4):
? Check the mains voltage connected to terminals X9:1 and X9:2.
检查X9:1和X9:2之间的主电压。 Mains voltage must be:
85-264V AC (100V-15% to 240V +10%) Frequency range:45-65Hz
主电压应该为85-264VAC(100V-15% to 240V +10%)频率范围为45-65Hz.
6.8.1.4 Load Cell Excitation Error 测压单元激发的错误
? Check that cables are correctly connected to the electronics. ? 检查电缆正确的连接到传感器。
? If single side measurement is used and only load cell A is connected to the electronics,
check that a shorting wire is connected between terminals X1:7 and X1:8.
如果用单边测量并只有一个测压单元A和传感器连接，保证X1:7和X1:8间短接。
- Switch off the tension electronics and measure the resistance between terminals X1:3 and X1:8.
关闭张力传感器测量X1:3和X1:8间的电阻。 The resistance is >8 ohm: 电阻>8ohm
Check that the total cable resistance between electronics and load cells does not exceed 5 ohm.
If cable resistance does not exceed 5 ohm, check cabling and load cells.
检查传感器和测压单元间的总电阻是否超过5欧姆。 如果不超过5欧姆，检查接线端子排和测压单元。 The resistance is <7 ohm: 电阻<7ohm
If cabling is correct, the electronics is probably defect. 如果接线端子排正确，传感器可能损坏。
Replace PFEA 11/112. 更换PFEA 111/112。
6.8.2 Warnings 警告
6.8.2.1 Profibus Communication Problem Profibus 通讯问题 Check:检查
? That the bus is correctly terminated.总线确被终止 ? The Profibus address.地址
? Cabling and connectors.卷线柱和连接器
6.8.2.2 Synchronization Problem 同步问题 Check the cabling and shield.
检查接线端子排和防护罩。
If the cabling is correct the tension electronics is probably defect.
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如果接线端子排正确可能是传感器的问题。 Replace PFEA 111/112. 更换PFEA 111/112。
6.8.3 Changing to Single Side Measurement if one Load Cell is Faulty 如果一个测压单元损坏变为单边测量
If one load cell is faulty it is possible to change from Standard Roll to Single Side Measurement. 如果一个测压单元损坏从标准辊变为单边测量是可行的。
For load cell connections, please refer to cable diagrams in Appendix B,C,D or E for the load cell type used in the installation.
关于测压单元的连接，请参照附录B，C，D和E。
Depending on which load cell that is faulty, do the following: 要确定哪个测压单元损坏，按照以下： Load cell A is faulty: A损坏
1. Disconnect load cell A from the Tension Electronics.
将A从传感器断开连线。
2. More connections for load cell B to the terminals where load cell A was connected.
B多出A的接线端子。
3. Connect a shorting wire for the load cell excitation circuit between X1:7 and X1:8.
将X1:7 和X1:8短接。 Load cell B is faulty: B损坏
1. Disconnect load cell B from the Tension Electronics. 将B从传感器断开连线。
2. Connect a shorting wire for the load cell excitation circuit between X1:7 and X1:8. 将X1:7 和X1:8短接。
After having changed the load cell connections, one parameter setting in the Tension Electronics must be changed.
改变测压单元接线后，张力传感器的参数设置也要改变。 Use the menu below to change from StandardRoll to SingleSide. 用下面的菜单从标准辊变为单边。
6.9 Changing Load Cells 改变测压单元
1. Before starting work, read the safety instructions stated in Chapter 1 Introduction.
开始工作前，阅读第一章的安全说明。
2. For load cells equipped with an extension cable and connector:
Disconnect the connection cable from the load cell and protect the connection cable from dirt and damage.
不要拆下连接压头的电缆，连接电缆应远离污物和危险。 For load cells equipped with a fixed cable:
Disconnect the load cell connection in the tension electronics or junction box and protect the loose cable ends from dirt and damage.
不要拆下张力测量装置到压头的电缆或者接线盒，并远离污物和危险。 3. Clean the load cell before it is unfastened and removed.
在松开和拆走前清理测压头。
4. Unfasten and remove the old load cell.
松开并拆走旧的压头。
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