Ethernet ip connection with siemens plc

    Hi everybody

    I have a problem between my plc and robot. I have a siemens plc s1500 and a fanuc robot, im trying to comunicate them with ethernet ip. I have follow all the steps but i cant comunicate the plc with the robot, both of them are in the same ip range and i can ping each one from the computer. Also i can ping the plc from the robot. The plc is the scanner and the robot is the adapter

    In the Fanuc robot, the ethernet ip connection is online but not running. I have checked all the EDS data from the robot and i am sending thease values correctly from the plc. Also the tcp/ip connection has been initialized.

    ¿Could someone help me?

    I would like to know at least if the problem is in the robot configuration or in the plc.

    Thanks very much

  • Lemster68 October 5, 2023 at 4:12 PM

    Approved the thread.

    I have a 1517TF-3 plc with v2.0 firmware, im using tia portal v15.1 and the robot controller is Fanuc R-30iB Plus. Im trying to communicate the plc with the robot using ethernet ip. In Tia portal im using LCCF enetScanner block, the plc works as scanner and the robot as adapter. Im sending to the robot the IP address, vendor identifier, product type,...

    The robot is configured to work in rack 89 and slot 1, also it has the ip address and it communicates with the plc. But in the plc the scanner active signal is always off. The ethernet ip connection is activated and the status is online, but is not running, im using the first connection.

    The settings of the robot are these:

    Vendor identifier: 356

    Product type:12

    Product code:4

    Revision Major: 3

    Revision MInor:1

    Assembly instance:100

    Pack interval:32 ms

    Output identifier: 151

    Output size:32

    Input identifier:101

    Input size:32

    Config data size:0

    Rack:89

    Slot:1

    Ethernet ip connection:1

    Robot ip address; 192.168.0.10

    PLC ip address:192.168.0.1

    Also in the robot ethernet ip configuration the input and output data size is 32 words

    I hope this information could help more

    Thanks in advice

    Quote from hermann

    Read and understand. :winking_face:

    I did read. I don't understand. When I don't understand something, I like to ask a clarifying question.

    I don't understand because if the robot was setup as an adapter, this wouldn't make sense:

    When the robot is configured as an adapter, the only thing to setup on the Fanuc side is the number of 16-bit words in and out.

    If those are the PLC settings, that would make sense, but, I don't know, hence my question.

    Hi everybody

    The robot is the adapter and the plc the scanner.

    Quote from pdl

    I did read. I don't understand. When I don't understand something, I like to ask a clarifying question.

    I don't understand because if the robot was setup as an adapter, this wouldn't make sense:


    When the robot is configured as an adapter, the only thing to setup on the Fanuc side is the number of 16-bit words in and out.

    If those are the PLC settings, that would make sense, but, I don't know, hence my question.

    I mean the this are the settings that i send from the plc to the fanuc robot. I have read in the document that fanuc have sent me that the plc must send all this values to the robot.

    I have spoken with fanuc and they have said that its probably a problem with the LCCF block of Tia Portal. It seems that they have had more problems with this library of Tia Portal.

    Thanks to all

    Quote from M.Ozkan

    Tia libraries of Ethernet/IP working very well. You should make settings correctly in TIA program. Call program in Cyclic Interrupt OB. Use RPI >= 32 ms.

    May I ask, where you get the "RPI >= 32 ms" from? I am currently configurating a Fanuc <-> Siemens connection with this function block and did not find this value in any of the manuals. Is this something you have found out by experiments?

    Quote from M.Ozkan

    RPI for PLC side. Use "packetinterval" parameter of Function block. You can found parameter in instance DB of FB. If you using RPI less than 32 connection problems occured randomly. Because Siemens PLC is not powerfull CPU for Ethernet/IP

    S7-1500 manages to support EIP Communication, S7-1200 does not have enough power (communicates but when loading a new configuration in the PLC, the communication drops). For me, the main problem was the incorrect configuration of the input and output registers on both sides (Robot and PLC). In the robot, the registers are 16 bits, while in the S7 they are 8 bits.

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