Product Description XI/ON - Eaton Automation

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XI/ON: Gateways for Modbus TCP 5 Implementation of Modbus TCP Table 13: results of the service request A service request may have the following results: Service code Meaning 0×0000 error free execution of service 0×FFFE service parameters incorrect/ inconsistent 0×FFFF service code unknown Note The services "indirect reading of registers" and "indirect writing of registers" offer an additional possibility to access any Modbus register. Current Modbus-masters support only a limited number of registerareas that can be read or written during the communication with a Modbus-server. These areas can not be changed during operation. In this case, the services mentioned above enables non-cyclic access to registers. 5.6.1 Indirect reading of registers 1 to 122 (Count) Modbus-registers are read, starting with address x (Addr). service-request 2000h 2001h 2002h 2003h 2004h 2005h 207Fh service no. service-response 0×0000 0×0003 Addr Count reserved 2080h 2081h 2082h 2083h 2084h 2085h 20FFh service no. result 0×0003 Addr Count register contents 78 M001973-01, 07/2007
XI/ON: Gateways for Modbus TCP 5 Implementation of Modbus TCP 5.6.2 "Indirect writing of registers" 1 to 122 (Count) Modbus-registers are written, starting with address x (Addr). service-request 2000h 2001h 2002h 2003h 2004h 2005h 207Fh service no. service-response 0×0000 0×0010 Addr Count register contents 2080h 2081h 2082h 2083h 2084h 2085h 20FFh service no. result 0×0010 Addr Count reserved M001973-01, 07/2007 79
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Product Description XI/ON - Eaton Automation

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