《功能和功能块》PPT课件.ppt

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1、Date:2023/1/30File:FCFBs.1SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and Drives功能和功能块功能和功能块Date:2023/1/30File:FCFBs.2SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and Drives目标学习了本章之后，你将学习了本章之后，你将.熟悉临时变量的用途.能够声明临时变量并在程序中使用.熟悉可赋值参数的块的用

2、途.能够编程可赋值参数的功能和它们的调用.了解功能(FC)和功能块(FB)之间的差别.熟悉背景模型和多重背景模型.熟悉静态变量的用途.能够声明静态变量并在程序中使用.能够编程可赋值参数的功能块和它们的调用Date:2023/1/30File:FCFBs.3SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and Drives局部变量局部变量临时变量临时变量 当相关块执行完毕后被清除 临时存储在 L stack中 可在下列块中使用 OB/FC/FB静态变量静态变量当相关块执行完毕后仍然 保留

3、 永久存储在DB中 只能在FB中使用局部变量局部变量/数据数据(只在一个块中有效)全局变量全局变量/数据数据(在全部程序中有效)PII/PIQ I/O M/T/C DB 区符号地址符号地址绝对地址绝对地址访问方式访问方式Date:2023/1/30File:FCFBs.4SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and Drives临时变量临时变量Date:2023/1/30File:FCFBs.5SIMATIC S7Siemens AG 2003.All rights reser

4、ved.SITRAIN Training for Automation and Drives256 Bytes事件所占用的 L stack1OB1OB 11操作系统程序所占用的局部数据区的总长度程序所占用的局部数据区的总长度FC 20有临时变量OB1FC20FC1733OB1FC1744OB1FC1766FC 20有临时变量OB1FC20FC1755FC 17有临时变量2OB1FC1727OB17Date:2023/1/30File:FCFBs.6SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automat

5、ion and Drives执行的程序执行的程序局部数据堆栈的大小局部数据堆栈的大小对于对于 S7-300:局部堆栈大小局部堆栈大小优先级优先级256 bytes127总容量总容量:1.5 Kbyte(CPU 313.316)启动程序启动程序(只执行一次只执行一次)循环扫描程序循环扫描程序256 bytes256 bytes256 bytes1232时间中断时间中断日时钟中断日时钟中断延时处理中断延时处理中断循环处理中断循环处理中断循环扫描中的错误处理中断循环扫描中的错误处理中断256 bytes162826256 bytes事件驱动中断事件驱动中断硬件中断硬件中断启动过程中的错误处理中断启动

6、过程中的错误处理中断Date:2023/1/30File:FCFBs.7SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and Drives块所需要的局部数据区的长度块所需要的局部数据区的长度Right ClickDate:2023/1/30File:FCFBs.8SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and Drives练习练习:使用临时变量使用临时变量#Setpoin

7、t#Setpoint替换为临时变量替换为临时变量#SetpointDate:2023/1/30File:FCFBs.9SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and Drives示例：用输出示例：用输出 LED故障信息指示故障信息指示Fault_SignalDisplayAcknowledgeStored_Fault要求要求解决方案解决方案AcknowledgeStored_FaultFault_SignalStored_FaultFault_SignalDisplayEdge_

8、MemoryFlash_FrequencyPRSSRQDate:2023/1/30File:FCFBs.10SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and DrivesFault_SignalEdge_MemoryAcknowledgeStored_FaultDisplayFlash_freqFC 20调用调用FC 20(e.g.in OB 1)可以分配参数的块可以分配参数的块A(AI1.0RM40.0AI1.1FP M40.1SM 40.0AM40.0)AM10.3OA I1.

9、1AN M40.0=Q5.1不可以不可以分配参数的块分配参数的块形式参数形式参数M 40.0M 40.1I 1.3I 1.0Q 5.1M 10.3实际参数实际参数A(A#AcknowledgeR#Stored_FaultA#Fault_SignalFP#Edge_MemoryS#Stored_Fault A#Stored_Fault)A#Flash_Freq.OA#Fault_SignalAN#Stored_Fault=#Display 可以分配参数的块可以分配参数的块FC 20 的的 STL程序程序Date:2023/1/30File:FCFBs.11SIMATIC S7Siemens AG

10、 2003.All rights reserved.SITRAIN Training for Automation and Drives定义定义FC 20形式参数形式参数使用方法使用方法图形显示图形显示只能读在块的左侧只能写在块的右侧 参数类型参数类型输入参数输出参数输入/输出 参数 定义定义inoutIn_out可读/可写在块的左侧 形式参数形式参数Date:2023/1/30File:FCFBs.12SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and Drives编辑可以分配参数

11、的块编辑可以分配参数的块Date:2023/1/30File:FCFBs.13SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and Drives调用可以分配参数的块调用可以分配参数的块Date:2023/1/30File:FCFBs.14SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and Drives练习练习:编辑可以分配参数的编辑可以分配参数的FC块块Date:2023/1

12、/30File:FCFBs.15SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and Drives练习练习:调用调用可以分配可以分配参数的参数的FC块块第一次调用第一次调用FC20时时的参数分配的参数分配 第二次调用第二次调用FC20时时的参数分配的参数分配Date:2023/1/30File:FCFBs.16SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and Drives功

13、能块功能块(FB)DB 2OB 1FB块的变量声明表块的变量声明表 FB 20ENFault_SignalAcknowledgeDisplayFlash_FrequencyENODate:2023/1/30File:FCFBs.17SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and Drives用功能块实现的故障信息显示用功能块实现的故障信息显示FB的声明表背景数据块Date:2023/1/30File:FCFBs.18SIMATIC S7Siemens AG 2003.All ri

14、ghts reserved.SITRAIN Training for Automation and Drives生成背景数据块生成背景数据块1.在在FB调用时生成背景数据块调用时生成背景数据块2.创建一个新的背景数据块创建一个新的背景数据块 在 LAD/STL/FBD Editor在 SIMATIC ManagerDate:2023/1/30File:FCFBs.19SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and Drives之后插入之后插入/删除块的参数删除块的参数SaveDa

15、te:2023/1/30File:FCFBs.20SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and Drives检查块的一致性检查块的一致性Date:2023/1/30File:FCFBs.21SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and Drives调用被修改过的块时应做的更正调用被修改过的块时应做的更正单击鼠标右键单击鼠标右键Date:2023/1/30File

16、:FCFBs.22SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and Drives练习练习:编辑功能块编辑功能块Date:2023/1/30File:FCFBs.23SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and Drives练习练习:调用调用功能块并测试功能块并测试添加添加 Network 2&3删除删除Network 2Date:2023/1/30File:FCFB

17、s.24SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and Drives多重背景模型多重背景模型DB10普通背景模型普通背景模型 FB20OB 1Call FB20,DB10Disturb._Input:=Acknowledge:=Flash_Freq:=Display:=DB11FB20Call FB20,DB11Disturb._Input:=Acknowledge:=Flash_Freq:=Display:=DB12FB20Call FB20,DB12Disturb._Inpu

18、t:=Acknowledge:=Flash_Freq:=Display:=多重背景模型多重背景模型 FB 100DB100Call FB100,DB100OB 1statDist_1FB20statDist_2FB20第二次调用 FB20的参数和静态参数Call Dist_2Disturb._Input:=Acknowledge:=Flash_Freq:=Display:=第一次调用 FB20的参数和静态参数Call Dist_1Disturb._Input:=Acknowledge:=Flash_Freq:=Display:=Date:2023/1/30File:FCFBs.25SIMATI

19、C S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and Drives练习练习:识别变量的类型识别变量的类型AbsoluteSymbolicTemporaryStaticParameterL#Number_1T#Maximum_valueT MW 40StatementL#Number_2L#Intermediate_resultL“Number_1”T#Number_2GlobalLocalDate:2023/1/30File:FCFBs.26SIMATIC S7Siemens AG 2003.Al

20、l rights reserved.SITRAIN Training for Automation and DrivesLAD/FBDSTL在块调用时使用在块调用时使用EN/ENO参数参数CALLFC1 NOP 0例子?.?FC 1ENENOFC 2ENENOFC 3ENENO=FC 1ENENO?.?无条件调用AI 0.1 JNB_001 CALLFC1 _001:A BR =Q 5.0FC 1ENENOI 0.1=Q 5.0条件调用Date:2023/1/30File:FCFBs.27SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN

21、 Training for Automation and Drives总结总结:块的调用块的调用 UC FC1 CC FC1 CALL FC1STLLADFBDFC1ENENOFC1ENENOFC1 (CALL)FB无参数，无静态参数 UC FB1 CC FB1 CALL FB1,DB2CALL有参数 CALL FC2 Par1:.Par2:.Par3:.FC2ENENOPar3Par1Par2FC2ENENOPar1Par2Par3有参数，和/或静态参数 CALL FB2,DB3 Par1:.Par2:.Par3:.FB2ENENOPar3Par1Par2DB3FB2ENENOPar3Par

22、1Par2DB3无参数语言FCFC1FB1ENENODB2FB1ENENODB2Date:2023/1/30File:FCFBs.28SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and Drives练习（选作）:多台设备的风扇监控功能A B C=1 S_ODT TIMER_NO ACKN SIG&A B C R S Q =1FLT FC 8 REPORTA B C ACKN TIMER_NO TVFLT SIG 功能 符号Date:2023/1/30File:FCFBs.29SIMATIC S7Siemens AG 2003.All rights reserved.SITRAIN Training for Automation and Drives练习（选作）:风扇监控功能的扩展 A B C=1 S_ODT TIMER_NO ACKN SIG&A B C R S Q =1FLT FC 8 REPORTA B C ACKN TIMER_NO TVFLT 功能 符号 ENAB&ENAB ENABSIG