SDCS-PIN-46-COAT

SDCS-PIN-46-COAT

关键词：PLC可编程控制系统，分散控制系统（DCS）安全仪表系统（SIS），ESD系统，振动监测系统，汽轮机控制 压缩机组控制系统（CCS）等各类工控系统部件
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  如果在用户程序中调用了Modbus从站协议指令，S7-200就可以作为Modbus从站工作，同时会有几个相关的子程序自动加到项目中，编程步骤如下：

    (1)在用户程序中调用Modbus从站指令。

    MBUS_INIT指令用来设置通信参数，该指令只在一个扫描周期内执行(用SM0.1)。程序中只能使用一条MBUS_SLAVE指令，每次扫描都应调用该指令，以响应接收到的通信请求。

    (2)为Modbus从站协议指令分配库内存。

    Modbus从站协议占用连续的779个字节变量存储区，需要为它们指定起始地址。在“文件”→“库内存”中为Modbus指令分配V存储区地址。可以输入起始地址，也可以使用“建议地址”。分配内存时，不要与MBUS_INIT指令中的HoldStart和MaxHold参数分配的V存储区的地址重叠，否则MBUS_INIT指令会返回一个错误。

    例如，当HoldStart和MaxHold分别为&VBO和1000时，允许主站访问从VB0开始的1000个保持寄存器(2000个字节)，所以为Modbus从站协议分配的V存储区的起始地址应大于等于VB2000。修改地址后，需要下载程序块，修改才会起作用。

    (3)处理Modbus协议与PPI协议的切换。

    PLC在“RUN”模式(SM0.7=1)时才能执行Modbus通信协议。为了保证编程软件与PLC的通信，模式开关切换到TERM位置(SM0.7=0)时，令SM30.0=0，将通信模式设置为PPI协议。

    【例】  首次扫描时执行MBUS_INIT指令，初始化Modbus从站协议，要求如下：从站地址为1，端口0的波特率为19 200 b/s，无奇偶校验，延迟时间为0，允许访问所有的I、Q和AI，允许访问从VB0开始的1000个保持寄存器字(2000个字节)，“Done”输出为M0.1，错误代码地址为MB1。模式开关在RUN位置时，每次扫描都执行Modbus从站协议指令MBUS_SLAVE。

CI560 3BUC98002R0001 3BUC980002R1
CS512 3BUR980009R1
DSTK 153
DSTK221L6 3BSC950164R60
IH530EN IH530EN 3BSE001248R1
IH532EN 3BSE018795R1
IH532ENK01 IH532EN 3BSE019205R1
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IH570 3BSE001253R1
PU512V1 PU512V1 3BSE004736R1
PU512V2 PU512V2 3BUR001401R1
PU514 PU514 3BSE013062R1
PU518 3BSE018680R1
RC527 3BSE008154R1
RF523 3BSE006802R1
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PU515 3BSE013063R1
3BSE016240R1 PM510V16
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CI527 3BSE019327R1
CI531 3BSE003825R1
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CI532V05 3BSE007297R1
CI532V09 3BUP001190R1
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CI570 3BSE001440R1
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CI626V1 3BSE012868R1
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DSTA N040 3BSE018436R1
DSTC120 DSTC 120 57520001-A/2,
DSTC190 DSTC 190 57520001-ER/1
DSTC406 57520001-DX/1
DSTD 131 DSTD131
DSTD150AI DSTD 150AI 3BYN571600-K/00
DSTX170 57160001-ADK
IH520EN 3BSE001249R1
IH581/B IH581 3BSC640008R1
MB510 3BSE002540R1
PM10YDSSB120-2 DSSB 120
PM511V08 3BSE011180R1
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PM632 3BSE005831R1
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PU513V2 PU513V2
PU515 3BSE013063R1
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SA162 3BSE003388R1
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TC570 3BSE001458RI
TC801 3BSE008562R1
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TK455 3BSE003780R1
TK526V050 3BSC950022R5
TK624V030 3BSC950138R1
TK802V001 3BSC950112R1
200-ANN S200-ANN 
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200C-IB16
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AI210
DI210
DO210
PM210
S200-IB16
S200-IR8
S200-PS13
S200-TB3
S200-TB3T
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TBE 2202
TBP 2201
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1SAP112100R0160 TB521-ARCNET
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1SAP150000R0271 PM590-ETH
1SAP150100R0100 PM591 
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1SAP170902R0001 CM579-ETHCAT
1SAP180100R0001 MC502
1SAP180200R0001 TK501
1SAP180200R0101 TK502
1SAP180300R0001 TA521 
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1SAP181200R0001 TA528
1SAP190500R0001 PS541-HMI
1SAP190600R0001 PS551-MC
1SAP190600R0101 PS551-MC
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1SAP210000R0001 TU506-FBP
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1SAP212000R0001 TU516 
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1SAP221000R0001 CI512-ETHCAT
1SAP221100R0001 CI590-CS31-HA
1SAP240000R0001 DI524 
1SAP240100R0001 DC532 
1SAP240500R0001 DC523 
1SAP240600R0001 DC522 
1SAP245000R0001 DX531
1SAP245200R0001 DX522 
1SAP250000R0001 AX522 
1SAP250100R0001 AX521 
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1SAP250200R3001 AO523-KBA
1SAP250300R0001 AI523 
1SAP250500R3001 AC522
1SAP250600R0001 AI531
1SAP260100R3001 PD501-4CH
1SAP260300R0001 CD522
1SAP270000R0001 DC541
1SAP42130099921 CI504-PNIO-XC
1SAP42150099921 CI506-PNIO-XC
1SAP550100R0001 CP650 
1SAP550200R0001 CP650-WEB 
1SAP800400R0010 DC501-CS31-ADA1
1TNE968900R0100 PM554-T
1TNE968900R0110 PM554-T-ETH 
1TNE968900R0200
1TNE968900R0220 PM554-R-ACT
1TNE968900R1100 PM564-T 
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1TNE968900R1200 PM564-R
1TNE968901R0100 MC503
1TNE968901R1100 TK503 Ask
1TNE968901R2100 TK504
1TNE968901R3107 TA566
1TNE968901R3200 TA561-RTC
1TNE968901R3201 TA560
1TNE968901R3203 TA570
1TNE968901R4300 TA562-RS
1TNE968902R1101 AI561
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1TNE968902R2001 DC561 
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1TNE968902R2301 DX561
1TNE968902R2302 DX571 
1TNE968903R0100
AI511
AI512 1SVP426436R0000
AX511 1SVP426455R0000
DC501-CS31 1SVP426327R0000
DI511
DO511 1SVP426451R0000
DX501-DP
TU501 1SVP426470R0000
TU512 1SVP426471R1000
TU525 1SVP426473R0000
3BHT300016R1 DP620
3BSE016347R1 CI631 
AI610 3BHT300000R1
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AI625 3BHT300036R1
AI630 3BHT300011R1
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AO610 3BHT300008R1
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DSTF610 HESN119032P1
DSTF620 HESN119033P1, HESN118033P0001
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SC610 3BSE001552R1
TF620 HESN119033P1,3BHT100013R1
3BSE042238R1 PP846
CI867K01 3BSE043660R1
CI868K01
CI869K01 3BSE049110R1
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PL810 3BDH000311R0101
PM640 3BSE010534R1
PNI800
PU410 3BSE056478R1
PU410K01 3BSE051826R1
TB842 3BSE022464R1
AO895  
3KDE175132L9100 SA910B 
3KDE175133L9100 SA910N
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BP914S 3BSE067082R1
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DP910B 3KDE175362L9100
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