《profibus技术培训 PROFIBUS-PA》由会员分享，可在线阅读，更多相关《profibus技术培训 PROFIBUS-PA（28页珍藏版）》请在金锄头文库上搜索。
1、PROCESS FIELD BUSPROFIBUS InternationalCopyright by PROFIBUS International 1997 PROFIBUS - THE International Open Fieldbus Standard Technique, Rev. 1, Part VI - Page 1L RExplosion ProtectedIntrinsic SafetyPressure EncapsulationP R O F I B U S第六部分PROFIBUS - PA技术培训PROCESS FIELD BUSPROFIBUS Internation
2、alCopyright by PROFIBUS International 1997 PROFIBUS - THE International Open Fieldbus Standard Technique, Rev. 1, Part VI - Page 2什么是PROFIBUS-PA ? 定义PROFIBUS-PA=PROFIBUS-DP 通信+对现场设备优选的传输技术PROFIBUS-PA=PROFIBUS-DP 通信+对现场设备优选的传输技术PROFIBUS-PAJx+PROFIBUS-DPPROCESS FIELD BUSPROFIBUS InternationalCopyright
3、 by PROFIBUS International 1997 PROFIBUS - THE International Open Fieldbus Standard Technique, Rev. 1, Part VI - Page 3什么是PROFIBUS-PA ?应用范围变送器阀执行器等等通过串行总线系统连接在化学工业和过程控制中使用通过数据线对现场设备供电在危险区域(EExi型保护区域)应用PROFIBUS-PA = 用于过程自动化的PROFIBUSJx+PROCESS FIELD BUSPROFIBUS InternationalCopyright by PROFIBUS Inter
4、national 1997 PROFIBUS - THE International Open Fieldbus Standard Technique, Rev. 1, Part VI - Page 4PROFIBUS-PA 适应所有过程自动化领域z对防爆和非防爆区域过程自动化的低端应用PROFIBUS-PA 是优选的z PROFIBUS-PA 完全满足化学工业用户组织(如NAMUR)对数字现场总线的要求 海上 石化工业 化学工业 发电和电力输送 化学爆炸试验 制药 食品饮料工业 水污水处理性能价格PROCESS FIELD BUSPROFIBUS InternationalCopyright
5、 by PROFIBUS International 1997 PROFIBUS - THE International Open Fieldbus Standard Technique, Rev. 1, Part VI - Page 5Zone 2采用PROFIBUS-PA 技术PA设备运行在下列防爆区域Zone 0:危险的爆炸瓦斯气体经常或长期存在的区域Zone 1:在正常运行期间危险的爆炸瓦斯气体有可能存在的区域Zone 2:不希望在正常运行期间存在危险的爆炸瓦斯气体的区域Zone 1Zone 1 Zone 0Zone 0Zone 0PROCESS FIELD BUSPROFIBUS I
6、nternationalCopyright by PROFIBUS International 1997 PROFIBUS - THE International Open Fieldbus Standard Technique, Rev. 1, Part VI - Page 6PROFIBUS-PA与4 20mA 系统的比较i总线耦合器1PNCPNCI/O 模块(1-x)终端块(PNC)I/O moduleX1终端块灰色线变送器供电源终端块Exi, 蓝色线分配器连接盒传感器1 . nPROFIBUS PA nPROFIBUS PA 1总线耦合器n连接总线PROFIBUS DP4.20 mA系
7、统PROFIBUS-PA传感器1 . nixx过程接近元件PROCESS FIELD BUSPROFIBUS InternationalCopyright by PROFIBUS International 1997 PROFIBUS - THE International Open Fieldbus Standard Technique, Rev. 1, Part VI - Page 7节省成本的潜力安装节省电线 PLC I/O 板安装元件(Ex-/电流隔离器等)排列机架空间减少错误减少安装时间PROCESS FIELD BUSPROFIBUS InternationalCopyright
8、by PROFIBUS International 1997 PROFIBUS - THE International Open Fieldbus Standard Technique, Rev. 1, Part VI - Page 8采用PROFIBUS-PA节省的成本温度4.20 mA PROFIBUS-PA(模拟)份额%价格$份额%价格$安装21 840 26 580仪器设备48 1930 52 1160规划26 1050 16 360开工5 180 5 120总计100 4000 100 2220节省45 % $ 1780如下数据来自于Cologne市acker化工厂的实际经验PROC
9、ESS FIELD BUSPROFIBUS InternationalCopyright by PROFIBUS International 1997 PROFIBUS - THE International Open Fieldbus Standard Technique, Rev. 1, Part VI - Page 9PROFIBUS-PA的基本成份PROFIBUS-DP 现场总线系统主站(1 类)从站(现场设备分散I/Os信号循环控制器接到PROFIBUS-PA的链接器)主站(2 类)PROFIBUS-DPPROFIBUS-PAJx+PROCESS FIELD BUSPROFIBUS
10、InternationalCopyright by PROFIBUS International 1997 PROFIBUS - THE International Open Fieldbus Standard Technique, Rev. 1, Part VI - Page 10PROFIBUS-PA的组态DCS/PLC段连接盒PROFIBUS-PADP/PA 链接器24 VPROFIBUS-DPx+拓扑PROCESS FIELD BUSPROFIBUS InternationalCopyright by PROFIBUS International 1997 PROFIBUS - THE
11、 International Open Fieldbus Standard Technique, Rev. 1, Part VI - Page 11PROFIBUS-PA的组态现场设备的供电DCS/PLCPROFIBUS-PA31.25 kbit/s 100F1双绞屏蔽电缆总长度最大1,900米(保护类型EEx ib,爆炸组: IIC) 10 mA 10 mA 10 mA 10 mA 10 mA24 V现场设备供电:Ex 区: max. 10Non-Ex 区: max. 30Spurmax. 30 mDP/PA LinkPROFIBUS-DPx+ 120 mAPROCESS FIELD BUS
12、PROFIBUS InternationalCopyright by PROFIBUS International 1997 PROFIBUS - THE International Open Fieldbus Standard Technique, Rev. 1, Part VI - Page 12PROFIBUS-PA的成份网络元件耦合器和链接器DP/PA 链接器(模板扩展中央模板最多带3个耦合器)DP/PA耦合器PROFIBUS-PA31.25 kbit/s24 VNon-Ex区:I 320 mA,最多30 个现场设备24 VNon-Ex:最多30 个现场设备Ex:最多3 x 10 个现
13、场设备J24 VJEx 区:I 120 mA最多10 个现场设备PROFIBUS-PA31.25 kbit/sJJPROFIBUS-DP up to 93.75 kBit/sPROFIBUS-DP up to 12 Mbit/sxxPROCESS FIELD BUSPROFIBUS InternationalCopyright by PROFIBUS International 1997 PROFIBUS - THE International Open Fieldbus Standard Technique, Rev. 1, Part VI - Page 13耦合器的功能段耦合器在不同的传输
14、技术之间提供一个网关gateway)PROFIBUS-PAIEC 1158-2RS 485PROFIBUS-DPz异步NRZ 编码z 1 Byte = 11 Bit(8 个用户位+ 1 开始位+ 1 停止位+ 1 奇偶校验位)z可变的波特率z同步Manchester 编码z 1 Byte = 8 Bitz固定波特率= 31.25 kBit/sDP/PA 耦合器PROCESS FIELD BUSPROFIBUS InternationalCopyright by PROFIBUS International 1997 PROFIBUS - THE International Open Field
15、bus Standard Technique, Rev. 1, Part VI - Page 14PROFIBUS-PA的组态互操作性DP/PA 耦合器,DP/PA 链接器24 VPROFIBUS-PA制造商X制造商Z制造商Y制造商YPA-行规制造商的特殊规定PROFIBUS-DPPROCESS FIELD BUSPROFIBUS InternationalCopyright by PROFIBUS International 1997 PROFIBUS - THE International Open Fieldbus Standard Technique, Rev. 1, Part VI
16、- Page 15PROFIBUS-PA的组态循环时间(例)DP/PA Link24 VPROFIBUS-PA 31.25 kbit/s10 ms10 ms 10 ms10 msmax. 1 ms10 ms循环时间= 1 ms循环时间= 4 x 10 ms + 10 ms = 50 ms循环帧(4 个字节被测值+ 1 个字节状态)非循环帧(读报警极限: 4 个字节)PROFIBUS-DP, 12 Mbit/sPROCESS FIELD BUSPROFIBUS InternationalCopyright by PROFIBUS International 1997 PROFIBUS - THE International Op
