| 摘要 |
PURPOSE: A communication device and a method are provided to improve reliability of transmitting and receiving messages and to prevent unintended communications. CONSTITUTION: A communication device generates an information list with information on other communication devices (S101). The communication device calculates a data error detection code for detecting errors using the information list (S105, S119). The communication device generates a packet with a code for detecting data errors (S107). The communication device transmits the packet to the other communication devices (S111, S129). [Reference numerals] (100A) First safety communication device; (100B) Second safety communication device; (123) Succession from failure to safety; (S101) Generate a list for device information; (S103) Generate safety data; (S105,S119) Calculate CRC; (S107) Generate safety PDU; (S109) Generate a Ethernet frame; (S111,S129) Ethernet frame (request); (S113) Receive the Ethernet frame; (S115) Obtain safety PDU; (S117) Obtain the safety data and CRC; (S121) Detect an error?; (S125) Consume the safety data; (S127) Generate the safety data |
