2/15/2012 8:26 AM | |
Posts: 30 Rating: (0) |
Hi, All, I want to do is to read some measured variables from SENTRON PAC 3200 with a plcGE Fanuc IC695CPU315 via Modbus TCP/IP. I know thatis necessaryto do aladder programto Open the Modbus TCP/IP (done)and to ReadData from Modbus (partial done). In the Sentron Pac 3200 pdf. there are measured variables with offsetfrom 1 to 519 with 2 register (4 bytes) and from 521 to 837 with 4 register (8 bytes), I hope that is correct. These measured variables can be available via Modbus with function code 0x03 and 0x04. For example I wanted to read from Sentron the variable with offset 3 thatt is VoltageVb_n. In the Proficy machine edition software ask me to introduce some Modbusrequirements such as: - Read from a Modbus/TCP device; I put code 3003 (this is from the GE side) - Modbus Function code ; ?? I put code 4 (read input register). I equate these measured variale beeing input register. - Adress in the Modbus TCP device ; ?? I put address 3 (VoltageVb_n). - Number of the Register in the Modbus device ; ?? I put 2. and doesn't work. In the last three requirementsI made a mistake and I need help. In the GEpdf. (see attach) the Proficy Machine edition software make an address mapping to use Modbus -to - PLC. With whatcould I indentify theSentron Modbus measured variable from 1 to837? Which are the corelation (regarding the last three requirments) of SENTRON Modbus function cod0X03, 0X04and theoffsetto the PLC GE Fanuc? Any information for me is useful. Thanks! AttachmentGE _Modbus TCP Server.pdf (1035 Downloads) |
2/15/2012 11:41 AM | |
Joined: 10/3/2008 Last visit: 8/28/2024 Posts: 961 Rating: (124) |
Hi, I'm sorry, I don't know the General Eletric part. Wüstenräuber |
2/15/2012 11:51 AM | |
Posts: 30 Rating: (0) |
Hi, The adress of the variable is 3 or it is need it to incleude into 0x03? thanks! |
2/15/2012 12:54 PM | |
Joined: 10/3/2008 Last visit: 8/28/2024 Posts: 961 Rating: (124) |
??? 3 decimal is the same like 3 hexadecimal... |
2/23/2012 9:32 AM | |
Posts: 30 Rating: (0) |
Hi Wuestenraeuber, I have a question regarding the Sentron PAC 3200 documentation (page 40). For example: The measured variable with ofsset 1: Voltage Va-n: number of registers = 2 (this means 2*16=32 bites)? format = float (this means that is aREAL, DWord or DINT data type)? When I read this measured variable I used as a INT data type. If so, all the logic that I did is wrong. Ineed to know if I'm right. Thanks! |
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