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1、Date:* File:SSP1_12C.1SIMATIC S7 Siemens AG 2000. All rights reserved.Information and Training Center Knowledge for Automation数据块中的数据存储Date:* File:SSP1_12C.2SIMATIC S7 Siemens AG 2000. All rights reserved.Information and Training Center Knowledge for Automation位存储器PIQPII数据存储区数据块DBxDByDBz.I/O 区L 堆栈Da
2、te:* File:SSP1_12C.3SIMATIC S7 Siemens AG 2000. All rights reserved.Information and Training Center Knowledge for Automation数据块 (DB)功能 FC10功能 FC20功能块 FB1OB1全局数据DB20所有块可以访问背景数据DB5 FB1的背景DBDate:* File:SSP1_12C.4SIMATIC S7 Siemens AG 2000. All rights reserved.Information and Training Center Knowledge f
3、or AutomationSTEP 7数据类型概述基本数据 类型 (到32 位)复杂数据 类型 (长于32位)用户定义数据类型 (长于 32 位) 位数据类型 (BOOL, BYTE, WORD, DWORD, CHAR) 数学数据类型 (INT, DINT, REAL) 定时器类型 (S5TIME, TIME, DATE, TIME_OF_DAY) 时间 (DATE_AND_TIME) 矩阵 (ARRAY) 结构 (STRUCT) 字符串 (STRING)数据类型 UDT (用户定义数据类型)Date:* File:SSP1_12C.5SIMATIC S7 Siemens AG 2000.
4、All rights reserved.Information and Training Center Knowledge for AutomationSTEP 7基本数据类型BOOL1True 或 False （1 或0） BYTE8B#16#A9 WORD16W#16#12AF DWORD32DW#16#ADAC1EF5 CHAR8 w S5TIME16S5T#5s_200msINT16123 DINT32L#65539 REAL321.2 或 34.5E-12TIME32T#2D_1H_3M_45S_12MS DATE16D#1993-01-20 TIME_OF_DAY32TOD#12:
5、23:45.12关键字长度 (位) 该类型的常数举例Date:* File:SSP1_12C.6SIMATIC S7 Siemens AG 2000. All rights reserved.Information and Training Center Knowledge for Automation复杂数据类型关键字长度 (位) 举例DATE_AND_TIME64DT#97-09-24-12:14:55.0STRING8 * (字符个数+2 ) This is a string (最多254个字符的字符串) SIEMENS ARRAY用户定义 测量值： ARRAY120 (相同数据类型的元
6、素组) INT STRUCT 用户定义 Motor: STRUCT (不同数据类型的元素组) Speed : INT Current: REAL END_STRUCTUDTUDT as block UDT as array element (用户定义数据类型 =用户定义 基本或复杂数据类型组成的 STRUCT Drive: ARRAY14 模板）Speed : INT UDT1 Current: REAL END_STRUCT Date:* File:SSP1_12C.7SIMATIC S7 Siemens AG 2000. All rights reserved.Information an
7、d Training Center Knowledge for Automation结构举例程序编辑器中的显示 (数据块 DB 1):Operating Speed, data type IntegerRated Current, data type RealStartup Current, data type RealTurning Direction, data type Bool带有名字“Motor_data” 的结构 (不同数据类型的几个元素) Motor_dataDate:* File:SSP1_12C.8SIMATIC S7 Siemens AG 2000. All rights
8、reserved.Information and Training Center Knowledge for Automation矩阵举例1. Measuring_point, data type Real2. Measuring_point, data type Real3. Measuring_point, data type Real10. Measuring_point, data type Real带有名字“Measuring_point” 的矩阵 (相同数据类型的几个元素) 程序编辑器中的显示 (数据块 DB 2):Measuring_pointDate:* File:SSP1_1
9、2C.9SIMATIC S7 Siemens AG 2000. All rights reserved.Information and Training Center Knowledge for Automation建立新数据块Date:* File:SSP1_12C.10SIMATIC S7 Siemens AG 2000. All rights reserved.Information and Training Center Knowledge for Automation输入、保存、下载和监视数据块Date:* File:SSP1_12C.11SIMATIC S7 Siemens AG
10、2000. All rights reserved.Information and Training Center Knowledge for Automation寻址数据单元078 位数据字节 0 DBB 0数据字节 1 DBW 0数据字节 8191DBD 8188DBW 8190DBB 8191数据字节 2 DBD 0 数据字节 3 DBX 4.1Date:* File:SSP1_12C.12SIMATIC S7 Siemens AG 2000. All rights reserved.Information and Training Center Knowledge for Automa
11、tion访问数据单元0 1 2 34 5 6 7 8 9DB 19 (符号名: Values)带有元素名字 “Start” 的 数据位 0.0或 A DB19.DBX0.0或A “Values”.Start或L DB19.DBW2或L “Values”.Number或L DB19.DBB5或L “Values”.Loop传统访问方法符号寻址完全表示访问1)OPN DB19 L DBW2NumberOPN DB19 A DBX 0.01)OPN DB19 L DBB5Loop绝对寻址Date:* File:SSP1_12C.13SIMATIC S7 Siemens AG 2000. All ri
12、ghts reserved.Information and Training Center Knowledge for Automation打开数据块的合法性OB 1OPNDB 4 LDBW2DB 4TDBW 2DB 4FC 1DB 4CALL FC 1TDBW 4DB 5OPNDB 5 LDBB6DB 5LDBW 0TDBW 8CALL FC 2FC 2DB 5DB 6OPNDB 6LDBB6DB 2T DB2.DBB 0DB 2LDBW 4LDBW 10DB ?FB 1CALL FB1, DB1?!Date:* File:SSP1_12C.14SIMATIC S7 Siemens AG 2
13、000. All rights reserved.Information and Training Center Knowledge for Automation全局 DB (例如)UDT 块作为模板用户定义数据类型 (UDT)FlourMilkEggsYeastSugar配方 2FlourMilkEggsYeastSugar配方 3FlourMilkEggsYeastSugarFlourMilkEggsYeastSugar根据UDT建立的 DB配方 1FlourMilkEggsYeastSugar带有三个UDT 类型的元素Date:* File:SSP1_12C.15SIMATIC S7 S
14、iemens AG 2000. All rights reserved.Information and Training Center Knowledge for Automation输入UDT块Date:* File:SSP1_12C.16SIMATIC S7 Siemens AG 2000. All rights reserved.Information and Training Center Knowledge for Automation根据数据类型建立数据块Date:* File:SSP1_12C.17SIMATIC S7 Siemens AG 2000. All rights re
15、served.Information and Training Center Knowledge for Automation举例：UDT中矩阵声明查看数据查看Date:* File:SSP1_12C.18SIMATIC S7 Siemens AG 2000. All rights reserved.Information and Training Center Knowledge for Automation练习12.1: 数据块和数据格式IB1DB10.DBW1DB11.DBW8 BINBCDQW6DB11.DBW9BINBCDQW6IB2MW1BCDBINMW3IB3MW5BCDBINMW7I0.7=“0” : BEC: BEDate:* File:SSP1_12C.19SIMATIC S7 Siemens AG 2000. All rights reserved.Information and Training Center Knowledge for Automation练习12.2：瓶装线编程- 数据存储满瓶 (MW102)空瓶 (MW 100)碎瓶 (MW 104)数据块 DB5变量: full变量: empty变量: broken
