Hi guys,
I am working in a project where a SCADA (PcVue, from arcinformatique) needs to communicate with a Siemens S7-317 PLC.
Our comms are really slow, and after checking the data transfered using wireshark, I think is because the PLC splits the data in telegrams not longer than 240 bytes. Therefore, if I am requesting a frame of 5000 bytes, it has to split it in several frames of 240 bytes, which basically slows the communication.
I am using the protocol S7 IP Master, which uses a fetch/write in the PLC to acquire the data (i.e. the SCADA asks requests to the PLC of the data it wants). The S7-317 has a CP 343-1 coupler.
My question is:
You know any way to configure the PLC in order to send data to the SCADA using telegrams longer than 240 bytes?
Thanks for your help,
Eduard
I am working in a project where a SCADA (PcVue, from arcinformatique) needs to communicate with a Siemens S7-317 PLC.
Our comms are really slow, and after checking the data transfered using wireshark, I think is because the PLC splits the data in telegrams not longer than 240 bytes. Therefore, if I am requesting a frame of 5000 bytes, it has to split it in several frames of 240 bytes, which basically slows the communication.
I am using the protocol S7 IP Master, which uses a fetch/write in the PLC to acquire the data (i.e. the SCADA asks requests to the PLC of the data it wants). The S7-317 has a CP 343-1 coupler.
My question is:
You know any way to configure the PLC in order to send data to the SCADA using telegrams longer than 240 bytes?
Thanks for your help,
Eduard