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I face a problem of Modbus card fault (TSX SCP 114 from Telemecanique). We read or write 6 adresses each time (with the function READ_VAR and WRITE_VAR), and we have a total of 16 variators. We have various types of variator (altivar, altistart). But the problem did not repeat at regular time. The card fault can be each 6 hours or each week... The diagnostic says it is a lack of memory (but we read only 4 or 5 bytes for each variator). We already changed the Modbus card without success, we changed the PLC (TSX 57 36 26) too. Did you already face this problem? Was it a program problem (but already checked) or can it be an electrical fault, that only the Modbus card can see, or Ethernet?
Thanks in advance.
Thanks in advance.