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对于连接到幅材张力电子设备PFEA113的每个称重传感器，大负载
范围为±6.5 x Fnom的存储器将存储施加至称重传感器的高负载。
大荷载包括：
•称重传感器零信号（称重传感器无负载）
•FRT，称重传感器测量方向上皮重的作用力分量
和
•FR，测量力（测量方向上张力的分力
称重传感器）
如果更换称重传感器，则可以重置大负载存储器。
3.12.12.2重置称重传感器
重置A将“大负载A”设置为零。
重置B将“大负载B”设置为零。
重置C将“大负载C”设置为零。
重置D将“大负载D”设置为零。
3.12.12.3模拟功能
模拟可以设置为打开或关闭。
如果模拟设置为打开，则参数PercentOfFnomA和PercentOfFnomB将为
显示。如果在ObjectType和中选择了单面A，则不会显示PercentOfNomb
如果在ObjectType中选择了单面B，则不显示百分比。
参数PercentOfFnom可以一步一步地设置在-100和+200之间。什么时候
如果“模拟”设置为“开”，它将替换称重传感器的测量值。值+100
表示该值与加载到Fnom的称重传感器相同。
激活模拟时，不能使用零集。当模拟设置为打开时，红色
状态指示灯点亮，显示屏上显示消息“模拟”。如果按下“确定”，则
消息以与故障和警告相同的方式移动到操作员菜单的底部
信息。
SetFactory默认值将模拟设置为关闭。
“模拟”设置为启用时，默认值为：
–正常百分比=55%
–标称百分比=45%
–平均百分比=55%
–标称百分比=45%
张力电子PFEA113，用户手册
第3.13节与PFEA113的Profibus DP通信
3BSE029382R0101版本C 3-39
3.13与PFEA113的Profibus DP通信
3.13.1关于Profibus DP的一般数据
PFEA113中Profibus DP通信的目的是提供高速
系统和PFEA113之间的通信链路。
Profibus DP是一种多点通信协议，旨在将PLC连接到传感器（DP
指“分布式外围设备”）。
物理接口为RS 485（双线电缆）。
大传输速率为12Mbit/s。
该协议基于主从原则。PFEA113是从机。Profibus主机
始终轮询从设备，这意味着轮询将以固定的时间间隔进行
当没有来自PFEA113的新数据可用时。
每个从设备的地址范围为0到125。
Profibus要求消息格式、通信参数和错误代码
在所谓的类型文件中，也被称为GSD文件（见附录a.8
Profibus DP-PFEA113的GSD文件）。然后将该文件存储在Profibus主设备中。
启动时，Profibus主设备验证具有给定类型文件的从设备是否确实可用
在公共汽车上。
3.13.2主从通信
主设备和从设备通过输出缓冲器和输入缓冲器进行通信。
主设备读取输入缓冲区，并在每个扫描周期写入输出缓冲区一次
Profibus。
从设备轮询输出缓冲器并更新输入缓冲器中的值。
主PLC
MC400
测量
过程
输出缓冲器
输入缓冲器
从机–MC400
主PLC
输出缓冲器
输入缓冲器
从属PFEA113
PFEA113
测量
过程
张力电子PFEA113，用户手册
第三章调试
3-40 3 BSE029382R0101 C版
3.13.3 Profibus物理介质
EN 50170中规定总线为A型线。应避免使用B型线。
介质的物理性质如表3-3和表3-4所示。
指定的线路参数会导致母线段的以下长度。
短截线敢达1500 kbit/s<6.6 m。
如果使用12 Mbit/s，则应避免使用短截线。
如果使用EN 50 170规定的线路A，则总线端接电阻组合
如图3-23所示，以确保在
HIER460279R1 UN0901DV1 UN0901D 扩展PCB线路板 ABB
HIER460279R1 UN0901DV1 UN0901D 扩展PCB线路板 ABB
For each load cell connected to the web tension electronics PFEA113, a maximum load
memory, with the range ±6.5 x Fnom, will store the highest load that is applied to the load cell.
The maximum load consists of:
• load cell zero signal (with no load on the load cell)
• FRT, applied force component of tare in the measuring direction of the load cell
and
• FR, measured force (force component of tension in the measuring direction of
the load cell)
The maximum load memory can be reset if a load cell is replaced.
3.12.12.2 Reset Load Cells
Reset A sets “Maximum load A” to zero.
Reset B sets “Maximum load B” to zero.
Reset C sets “Maximum load C” to zero.
Reset D sets “Maximum load D” to zero.
3.12.12.3 Simulation function
Simulation can be set to ON or OFF.
If simulation is set to ON, the parameters PercentOfFnomA and PercentOfFnomB will be
displayed. PercentOfFnomB is not shown if Single side A has been selected in ObjectType and
PercentOfFnomA is not shown if Single side B has been selected in ObjectType.
The parameter PercentOfFnom can be set between –100 and +200 in steps of one. When
simulation is set to ON, it replaces the measured value from the load cells. The value +100
means that the value is the same as load cell loaded to Fnom.
Zero set can not be used when simulation is activated. When simulation is set to ON, the red
status led is lit and on the display the message “Simulation” is shown. If “ok” is pressed, the
message is moved to the bottom of the Operator menu in the same way as failure and warning
messages.
SetFactory Default sets the simulation to OFF.
When simulation is set to ON, the default values are:
– PercentOfFnomA = 55%
– PercentOfFnomB = 45%
– PercentOfFnomC = 55%
– PercentOfFnomD = 45%
Tension Electronics PFEA113, User Manual
Section 3.13 Profibus DP Communication with PFEA113
3BSE029382R0101 Rev C 3-39
3.13 Profibus DP Communication with PFEA113
3.13.1 General Data about Profibus DP
The purpose of the Profibus DP communication in PFEA113 is to provide a high speed
communication link between superior systems and the PFEA113.
Profibus DP is a multidrop communication protocol intended to connect PLCs to sensors (DP
means “Distributed Peripherals”).
The physical interface is RS 485 (two wire cable).
The maximum transfer rate is 12 Mbit/s.
The protocol is based on a master-slave principle. The PFEA113 is a slave. A Profibus master
polls the slaves all the time, that means the polling is going on with a fixed time interval even
when no new data is available from the PFEA113.
Each slave has an address in the range 0 to 125.
Profibus requires that the message format, communication parameters and error codes
of slaves are made available in a so called type file, also known as GSD file (See Appendix A.8
Profibus DP - GSD File for PFEA113). This file is then stored in the Profibus Master.
At start-up the Profibus Master verifies that the Slave with the given type file is indeed available
on the bus.
3.13.2 Master-slave Communication
The Master and the slave communicate via an output buffer and an input buffer.
The master reads the input buffer and writes to the output buffer once every scan cycle for
Profibus.
The slave polls the output buffer and updates values in the input buffer.
Master - PLC
MC400
measuring
process
Output buffer
Input buffer
Slave – MC400
Master-PLC
Output buffer
Input buffer
Slave-PFEA113
PFEA113
measuring
process
Tension Electronics PFEA113, User Manual
Chapter 3 Commissioning
3-40 3BSE029382R0101 Rev C
3.13.3 Profibus Physical Media
The bus line is specified in EN 50170 as line type A. Line type B should be avoided.
The physical properties of the media are shown in Table 3-3 and Table 3-4.
The specified line parameters result in the following lengths of a bus segment.
Stub lines up to 1500 kbit/s < 6.6 m.
If you are using 12 Mbits/s you should avoid stub lines.
If you are using line A as specified by EN 50 170, the bus terminating resistance combination
is as shown in Figure 3-23, so that a defined idle state potential is ensured on th
HIER460279R1 UN0901DV1 UN0901D 扩展PCB线路板 ABB
