Contents
BU 0050 GB-3111 Subject to technical amendments 5
FOREWORD ................................................................................................................................ 7
1 USS ........................................................................................................................................... 7
1.1 General information .............................................................................................. 7
1.1.1 The USS Protocol ..................................................................................................... 7
1.1.2 Features .................................................................................................................... 7
1.1.3 Delivery ..................................................................................................................... 7
1.1.4 Scope of supply ......................................................................................................... 8
1.1.5 Certifications ............................................................................................................. 8
1.1.6 Identification System ................................................................................................. 8
1.2 Modules ................................................................................................................ 9
1.2.1 SK 500E .................................................................................................................... 9
1.2.2 SK 700E .................................................................................................................. 12
1.2.3 SK 300E .................................................................................................................. 18
1.3 USS Protocol Specification ................................................................................ 19
1.3.1 General information................................................................................................. 19
1.3.2 Telegram Structure ................................................................................................. 19
1.3.3 Data Coding ............................................................................................................ 20
1.3.4 Character Frame ..................................................................................................... 20
1.3.5 Transfer Procedure ................................................................................................. 21
1.3.6 Start Pause Time .................................................................................................... 21
1.3.7 Response Delay Time ............................................................................................. 22
1.4 Bus Configuration ............................................................................................... 23
1.4.1 General information................................................................................................. 23
1.4.2 Topology ................................................................................................................. 23
1.4.3 Transfer Method ...................................................................................................... 23
1.4.4 Installation of the Bus System ................................................................................. 24
1.5 Data transmission ............................................................................................... 26
1.5.1 Structure of reference data ..................................................................................... 26
1.5.2 PPO types ............................................................................................................... 27
1.5.3 Process data (PZD)................................................................................................. 29
1.5.4 Parameter range (PKW) .......................................................................................... 39
1.6 Telegram examples ............................................................................................ 43
1.6.1 The Macro Generator .............................................................................................. 43
1.6.2 Switch-on block Standby .................................................................................... 44
1.6.3 Enable with 50% setpoint ........................................................................................ 46
1.6.4 Writing a parameter................................................................................................. 47
1.6.5 Reading the acceleration time parameter ............................................................... 48
1.7 Master Telegram Times ..................................................................................... 49
1.8 Frequency Inverter Settings ............................................................................... 50
1.8.1 Frequency inverter bus parameters ........................................................................ 50
2 MODBUS RTU ........................................................................................................................ 61
2.1 The bus system .................................................................................................. 61
2.2 Features ............................................................................................................. 61
2.3 Telegram Structure ............................................................................................. 62
2.4 RTU Frames ....................................................................................................... 62
2.5 Function Codes .................................................................................................. 62
2.5.1 01h Read Coil ......................................................................................................... 63
2.5.2 05h Write Single Coils ............................................................................................. 63
2.5.3 0Fh Write Multiple Coils .......................................................................................... 64
2.5.4 03h Read Holding Register ..................................................................................... 65
2.5.5 06h Write Single Register ....................................................................................... 66
2.5.6 10h Write Multiple Register ..................................................................................... 66
2.6 Exception Responses ......................................................................................... 68
2.7 Watchdog ........................................................................................................... 68
2.8 Description of parameters .................................................................................. 69
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