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Modbus TCP/IP :Problem in using of coil and input

Created by: arian59 at: 1/1/2014 11:15 AM (14 Replies)

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1/1/2014 11:15 AM	Rate (0)
arian59 Regular Member Joined: 9/3/2011 Last visit: 4/22/2024 Posts: 24 Rating: (0)	hello friends. in my project,there is a H rack with 2 cpu 412-3h and 4 cp 443-1 2 cp for redundant connection with HMI via tcp and 2 cp for redundant connection with DCS via modbus tcp/ip I download the related function from Siemens site and use in my project. really i dont have any lisence for tcp/ip but it works. I can send data just as a holding register but i nead to send data as input and recive data as coil but it doesnt work. is it possible that lisence is cause of these problems? how can i solve it?

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1/2/2014 10:05 AM	Rate (0)
Kaulquappe Posts: 3093 Rating: (323)	Hello Arian, even inputs and coils can be used without license. Which error number do you get? Regards, Kaulquappe
Kaulquappe Posts: 3093 Rating: (323)
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1/27/2014 7:54 AM	Rate (0)
arian59 Regular Member Joined: 9/3/2011 Last visit: 4/22/2024 Posts: 24 Rating: (0)	dear Kaulquappe, excuse me because of my delay. I checked it.there is no error , Busy and done and the only error is A090 which is for license. really I cant recive data and just I cant send data in holding register I dont know what I do? I have printed my program and it has been attached. note that Network 1,2 from ob100 and network 72 in ob1 Attachment Binder1.pdf (824 Downloads)

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1/27/2014 12:42 PM	Rate (0)
Kaulquappe Posts: 3093 Rating: (323)	Hello Arian, as long as the done-counter increases and the error-counter stays at zero everything is fine from communication point of view. Requests are sent and the server responded as expected. Regards, Kaulquappe
Kaulquappe Posts: 3093 Rating: (323)
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1/27/2014 3:13 PM	Rate (0)
arian59 Regular Member Joined: 9/3/2011 Last visit: 4/22/2024 Posts: 24 Rating: (0)	hello Kauluappe I test it by simulator and IsawthatI can send datafrom plcto simulator and when I config for recieve data ,I cant recieve data . and count error,count done,busy are 0. I dont know what I do?

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1/27/2014 5:53 PM	Rate (0)
Kaulquappe Posts: 3093 Rating: (323)	Hello Arian, as long as the done-counter doesn't increase, nothing happens. I cant't find where you set the ENQ bit in your program. Do you set it in the variable table? Regards, Kaulquappe
Kaulquappe Posts: 3093 Rating: (323)	Last edited by: Kaulquappe at: 1/27/2014 5:54 PM
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1/28/2014 8:21 AM	Rate (0)
arian59 Regular Member Joined: 9/3/2011 Last visit: 4/22/2024 Posts: 24 Rating: (0)	Hello Kaulquappe thank you for your reply according to attached file , in network 71 from ob1 m500.7 is pulse with10 sec. ifbusy,error,done are 0,"startup bit for modbus' are 1 in one cycle,and then according to command S CONTROL_DAT.ENQ the function will trigged. it worksbut just for sending as a holding register. as soon as I change command SET = "CONTROL_DAT".WRITE_READ to CLR ="CONTROL_DAT".WRITE_READ and chang number of DB(another DB for recived data)in ob100 it does not work. I think it is because of license.

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1/28/2014 3:35 PM	Rate (0)
Kaulquappe Posts: 3093 Rating: (323)	Hello Arian, the problems you have are not because of the missing license. They are just a level 8 error You can't change initialisation parameters during cyclic operation! For each triggered job you will get either DONE or ERROR. As long as the counters don't increase no job is triggered. When ERROR is set, STATUS shows the according error number. Regards, Kaulquappe
Kaulquappe Posts: 3093 Rating: (323)
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1/29/2014 11:37 AM	Rate (0)
arian59 Regular Member Joined: 9/3/2011 Last visit: 4/22/2024 Posts: 24 Rating: (0)	hello kaulquappe thank you for your reply please tell me which item should be change exactly? thank you

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1/29/2014 1:10 PM	Rate (0)
Kaulquappe Posts: 3093 Rating: (323)	Hello Arian, the initialisation parameters define the mapping - which register/coil should be transferred to/from which DB. With this parameters no data transfer is initiated. The runtime parameters define which request is sent when ENQ is set. Only the runtime parameters can be modified during cyclic operation. You can find all information which parameters are initialisation ones and which are cyclic ones in the manualand inthe online help as well. Regards, Kaulquappe
Kaulquappe Posts: 3093 Rating: (323)
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