D301271 1013 - FGEN - multi protocol 9-1
9 Implementation of Modbus TCP
9.1 Common Modbus description................................................................................................................... 9-2
9.1.1 Protocol description........................................................................................................................................................................9-3
9.1.2 Data model.........................................................................................................................................................................................9-4
9.2 Implemented Modbus functions............................................................................................................... 9-6
9.3 Modbus registers........................................................................................................................................ 9-7
9.3.1 Data width of the I/O-modules in the modbus-register area........................................................................................ 9-10
9.3.2 Register mapping of the FGEN-stations................................................................................................................................ 9-11
– FGEN-IM16-x001 ....................................................................................................................................................................... 9-11
– FGEN-OM16-x001 ..................................................................................................................................................................... 9-12
– FGEN-IOM88-x001 ................................................................................................................................................................... 9-13
– FGEN-XSG16-x001 .................................................................................................................................................................... 9-14
– Meaning of the register bits .................................................................................................................................................. 9-15
9.3.3 Register 100Ch: "Station status"............................................................................................................................................... 9-16
9.3.4 Register 1130h: „Modbus-Connection-Mode“ ................................................................................................................... 9-17
9.3.5 Register 1131h: „Modbus-Connection-Timeout“ .............................................................................................................. 9-17
9.3.6 Register 0×113C und 0×113D: „Restore Modbus-Connection-Parameters”........................................................... 9-17
9.3.7 Register 0×113E und 0×113F: „Save Modbus-Connection-Parameters“.................................................................. 9-18
9.4 Bit areas: mapping of input-discrete- and coil-areas ............................................................................9-19
9.5 Error behavior of outputs (watchdog)....................................................................................................9-20
9.6 Parameters and diagnostic messages of the I/O channels ...................................................................9-21
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