LB Remote I/O System
Commissioning
2018-07
51
Figure 4.2 USB converter in device manager
4.3 Startup Phase
Do not start to operate all the remote I/O stations simultaneously; instead, connect each
remote I/O station to the master in succession.
Ensure that the master read cycle and the com unit watchdog are coordinated with one
another. The duration for the transition to substitute values must be longer than the duration of
a bus cycle.
For the purposes of fault analysis, we recommend using a bus monitor that is capable of
passively monitoring data telegrams on the fieldbus.
Temporary Overload of the Power Supply
To avoid an overload of the power supply in the startup phase as a result of increased startup
currents, the number of certain I/O modules on the backplane is limited.
Use:
A maximum of 11 LB3*, LB4*, and LB7* single-channel I/O modules.
Each of these I/O modules consumes 9.09 % of the startup capacity.
Or a maximum of 8 LB3*and LB7* four-channel I/O modules.
Each of these I/O modules consumes 12.5 % of the startup capacity.
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