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cpu 226 as modbus slave - no connection establishment

6/12/2014 8:29 PM	Rate (0)
Rnarias Posts: 4 Rating: (0)	Blue Moderator: Question is splitted. Rnarias I need help! and i've tried everything, i think. i need to programme a cpu 226 as modbus slave. i´m using the siemens support example; and i get error 5 in Mbus_init and error 10 in Mbus_slave. is this an overlap. but how can i solve it? i'm using a cable USB/PPI. step 7 v4.0. the modbus libraries. the port 0. Mbus_init data: mode = 1 Addr = 2 (because is this the addres of cpu 226) Baud = 9600 parity=0 delay=0 MaxIQ = 128 MaxAI = 32 MaxHold = 1000 HoldStart = &VB0 the addres of libraries is VB780. i've changed this addres to VB1560, VB2340, VB3120 and so on, the result is the same error. i don't get it. could you hep me please? i get another situation here. sorry for my english by the way. Now i gwt this error in Step 7 "imposible establecer un enlace con la direccion indicada. puede que sea una direccion no valida o inexistente" "impossible to establish a link with the indicated direction. may be an address not valid or missing" what is that? which direction refers to? the PLC CPU 226 address? please help
Rnarias Posts: 4 Rating: (0)	Last edited by: Blue Moderator at: 13.06.2014 08:04 New subject after splitting from /tf/WW/en/Posts/109958#top
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6/17/2014 1:40 PM	Rate (0)
Vijay Vee Bronze Member Joined: 9/14/2012 Last visit: 8/7/2025 Posts: 91 Rating: (15)	HiRnarias, In modbus Communcication you have to check this things carefully Baud rate,parrty,mode,id all the things and especially check your cable.in your program are you use the MBUS SLAVE instruction or not.i have attached my Main programe Pdf For your reference Regards, Vijay Vee Attachment program pdf.pdf (509 Downloads)
	Regards, VeeJay The best way to master something is to teach it.!!
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6/27/2014 8:56 PM	Rate (0)
Rnarias Posts: 4 Rating: (0)	mmm ok. mi configuration is: in Step 7: Baud = 9600 cable = ppi / 232 mode = 11 bits timeout = 1 s local addres = 0 remote addres= 2 in pc port COM1: baudios = 9600 datas bits = 8 parity = 0 stop bit = 2 flow control= non Mode = RTU timeout is =1 s in mbus_init: mode = 1 addr = 2 baud = 9600 parity =0 delay = 0 maxIQ = 16 MaxAi = 0 Maxhold = 100 Holstart = &VB0 library = &VB780 the cable works fine, i guess, because i can program the CPU 226 (step 7 recognize the cpu) however when the program run step 7 show the error message yes, i´m using mbus_slave after mbus_init. please help.
Rnarias Posts: 4 Rating: (0)	Last edited by: Rnarias at: 6/30/2014 8:54 PM Last edited by: Rnarias at: 6/30/2014 8:06 PM Last edited by: Rnarias at: 6/27/2014 9:09 PM
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