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S7 讀/寫數(shù)據(jù)/高級讀取-EG網(wǎng)關歷史節(jié)點

2025-09-24 11:00:56 閱讀：發(fā)布人：縱橫智控

概述

S7讀數(shù)據(jù) S7寫數(shù)據(jù) S7高級讀取支持以S7協(xié)議讀寫西門子系列PLC的數(shù)據(jù)，目前已經(jīng)測試過的西門子PLC如下：S7-200 Smart、S7-300、S7400、S7-1200、S7-1500。支持數(shù)據(jù)點批量導入導出。

S7讀數(shù)據(jù) S7寫數(shù)據(jù) S7高級讀取共用一個S7配置節(jié)點，主要功能也集中在S7配置節(jié)點內(nèi)，配置內(nèi)容如下：

接口:目前只支持以太網(wǎng),也就是S7協(xié)議

IP:PLC的IP地址

端口:S7通信端口,默認102

模式:Rack/Slot(機架號/槽號,通常選擇此模式,博圖軟件查看地址見下圖)

TASP(S7-200 Smart選擇TASP,10.02 03.01)

采集周期:配置從PLC讀取變量的時間間隔,如果設置0則禁用自動讀取

超時時間:配置從PLC讀取變量的超時時間,如果網(wǎng)絡繁忙或者延遲很高,可能需要加大此時間

博圖軟件機架號槽號查看方式：

S7 讀/寫數(shù)據(jù)/高級讀取-EG網(wǎng)關歷史節(jié)點

變量地址即數(shù)據(jù)點地址，表示方式和Step7以及博圖軟件有一些不同，具體配置請參考下表進行設置：

變量地址	Step7 地址	數(shù)據(jù)類型	描述
DB5,X0.1	DB5.DBX0.1	Boolean	Bit 1 of byte 0 of DB 5
DB23,B1 or DB23,BYTE1	DB23.DBB1	Number	Byte 1 (0-255) of DB 23
DB100,C2 or DB100,CHAR2	DB100.DBB2	String	Byte 2 of DB 100 as a Char
DB42,I3 or DB42,INT3	DB42.DBW3	Number	Signed 16-bit number at byte 3 of DB 42
DB57,WORD4	DB57.DBW4	Number	Unsigned 16-bit number at byte 4 of DB 57
DB13,DI5 or DB13,DINT5	DB13.DBD5	Number	Signed 32-bit number at byte 5 of DB 13
DB19,DW6 or DB19,DWORD6	DB19.DBD6	Number	Unsigned 32-bit number at byte 6 of DB 19
DB21,R7 or DB21,REAL7	DB19.DBD7	Number	Floating point 32-bit number at byte 7 of DB 21
DB2,S7.10*	-	String	String of length 10 starting at byte 7 of DB 2
I1.0 or E1.0	I1.0 or E1.0	Boolean	Bit 0 of byte 1 of input area
Q2.1 or A2.1	Q2.1 or A2.1	Boolean	Bit 1 of byte 2 of output area
M3.2	QM3.2	Boolean	Bit 2 of byte 3 of memory area
IB4 or EB4	IB4 or EB4	Number	Byte 4 (0 -255) of input area
QB5 or AB5	QB5 or AB5	Number	Byte 5 (0 -255) of output area
MB6	MB6	Number	Byte 6 (0 -255) of memory area
IC7 or EC7	IB7 or EB7	String	Byte 7 of input area as a Char
QC8 or AC8	QB8 or AB8	String	Byte 8 of output area as a Char
MC9	MB9	String	Byte 9 of memory area as a Char
II10 or EI10	IW10 or EW10	Number	Signed 16-bit number at byte 10 of input area
QI12 or AI12	QW12 or AW12	Number	Signed 16-bit number at byte 12 of output area
MI14	MW14	Number	Signed 16-bit number at byte 14 of memory area
IW16 or EW16	IW16 or EW16	Number	Unsigned 16-bit number at byte 16 of input area
QW18 or AW18	QW18 or AW18	Number	Unsigned 16-bit number at byte 18 of output area
MW20	MW20	Number	Unsigned 16-bit number at byte 20 of memory area
IDI22 or EDI22	ID22 or ED22	Number	Signed 32-bit number at byte 22 of input area
QDI24 or ADI24	QD24 or AD24	Number	Signed 32-bit number at byte 24 of output area
MDI26	MD26	Number	Signed 32-bit number at byte 26 of memory area
ID28 or ED28	ID28 or ED28	Number	Unsigned 32-bit number at byte 28 of input area
QD30 or AD30	QD30 or AD30	Number	Unsigned 32-bit number at byte 30 of output area
MD32	MD32	Number	Unsigned 32-bit number at byte 32 of memory area
IR34 or ER34	IR34 or ER34	Number	Floating point 32-bit number at byte 34 of input area
QR36 or AR36	QR36 or AR36	Number	Floating point 32-bit number at byte 36 of output area
MR38	MR38	Number	Floating point 32-bit number at byte 38 of memory area
DB1,DT0	-	Date**	A timestamp in the DATE_AND_TIME format
DB1,DTZ10	-	Date**	A timestamp in the DATE_AND_TIME format, in UTC
DB2,DTL2	-	Date**	A timestamp in the DTL format
DB1,DTLZ12	-	Date**	A timestamp in the DTL format, in UTC
DB57,RWORD4	DB57.DBW4	Number	Unsigned 16-bit number at byte 4 of DB 57, interpreted as Little-Endian
DB13,RDI5 or DB13,RDINT5	DB13.DBD5	Number	Signed 32-bit number at byte 5 of DB 13, interpreted as Little-Endian
MRW20	MRW20	Number	Unsigned 16-bit number at byte 20 of memory area, interpreted as Little-Endian