V1.1 Chapter 8 Maintenance and Maintenance e ························································· 195 8.1 Daily maintenance and Maintenance ································································ 195 8.2 Periodic Preservation and Maintenance ···························································· 195 8.3 Warranty Description ····················································································· 196 Chapter 9 Serial Port RS485 Communication Protocol ········································· 198 9.1 Communication Overview ··············································································· 198 9.2 Communication Protocol Description ································································ 198 9.3 Communication Protocol ··············································································· 200 4