Siemens SINAMICS G120 CU240E-2 - Page 8

Table of contents
Inverter with CU240B-2 and CU240E-2 Control Units
8 Operating Instructions, 07/2010, FW 4.3.2, A5E02299792B AA
7.7.6 Load torque monitoring (system protection) ............................................................................. 181
7.7.7 Speed and load failure via digital input ..................................................................................... 183
7.8
Status messages....................................................................................................................... 186
7.8.1
Overview, evaluating the inverter state..................................................................................... 186
7.8.2
System runtime ......................................................................................................................... 186
7.9
Technological functions............................................................................................................. 187
7.9.1
Braking functions of the inverter ............................................................................................... 187
7.9.1.1
Comparison of electrical braking methods................................................................................ 187
7.9.1.2
DC braking ................................................................................................................................ 190
7.9.1.3
Compound braking.................................................................................................................... 192
7.9.1.4
Dynamic braking ....................................................................................................................... 194
7.9.1.5
Braking with regenerative feedback to the line ......................................................................... 196
7.9.1.6
Motor holding brake .................................................................................................................. 197
7.9.2
Automatic restart and flying restart ........................................................................................... 203
7.9.2.1
Flying restart – switching on while the motor is running ........................................................... 203
7.9.2.2
Automatic switch-on .................................................................................................................. 205
7.9.3
PID technology controller.......................................................................................................... 209
7.9.4
Logical and arithmetic functions using function blocks ............................................................. 210
7.10
Safe Torque Off (STO) safety function ..................................................................................... 214
7.10.1
Prerequisite for STO use........................................................................................................... 214
7.10.2
Permitted sensors ..................................................................................................................... 214
7.10.3
Connecting fail-safe digital inputs ............................................................................................. 215
7.10.4
F-DI signal filtering .................................................................................................................... 216
7.10.5
Forced dormant error detection ................................................................................................ 219
7.10.6
Password................................................................................................................................... 220
7.10.7
Commissioning the STO ........................................................................................................... 220
7.10.7.1
Defining commissioning method ............................................................................................... 221
7.10.7.2
Assigning parameters to the STO............................................................................................. 221
7.10.7.3
Activate settings ........................................................................................................................ 222
7.10.7.4
Multiple assignment of the DI.................................................................................................... 222
7.10.8
Acceptance test - following completion of commissioning........................................................ 224
7.10.8.1
Prerequisites and authorized persons ...................................................................................... 224
7.10.8.2
Complete acceptance test......................................................................................................... 224
7.10.8.3
Reduced acceptance test.......................................................................................................... 225
7.10.8.4
Documentation .......................................................................................................................... 226
7.10.8.5
Completion of the certificate...................................................................................................... 228
7.11
Switchover between different settings ...................................................................................... 230
7.11.1
Changing over the command data sets (manual, automatic) ................................................... 230
7.11.2
Switching over drive data sets (different motors connected to an inverter).............................. 233
8
Service and maintenance ...................................................................................................................... 237
8.1
Replacing the inverter components .......................................................................................... 237
8.2
Replacing the Control Unit ........................................................................................................ 239
8.3
Replacing the Power Module .................................................................................................... 241
9
Alarms, faults and system messages..................................................................................................... 243
9.1
Operating states indicated on LEDs ......................................................................................... 244
9.2
Alarms ....................................................................................................................................... 246
9.3
List of warnings ......................................................................................................................... 249
9.4
Faults......................................................................................................................................... 251