Use Of Bidirectional Inputs/Outputs On The Cu - Siemens SINAMICS S120 Function Manual

12.5.2

Use of bidirectional inputs/outputs on the CU

The bidirectional inputs/outputs of terminals X122 and X132 on the CU (DO1) can be used
by a drive object as well as a higher-level controller (resource sharing).
The assignment to a terminal is defined by means of BICO interconnections which are either
connected to a controller via the DO1 telegram p0922 = 39x or to a drive object.
The setting of parameter p0729 indicates how a digital output of a Control Unit has been
assigned, i.e. whether the output of an onboard terminal X122 or X132 is assigned directly to
the Control Unit or connected via PROFIBUS to a higher-level controller.
● r0729 = 0: The output is assigned to the Control Unit of the drive or terminal output not
● r0729 = 1: Output is assigned to the higher-level controller (PROFIBUS connection).
Parameter r0729 is updated if
● the direction of the onboard terminals changes over (p0728), or
● the signal sources for the outputs (p0738 ff) are changed.
Drive functions
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
available.
Assignment to the controller means:
– Terminal is parameterized as output x (p0728.x =1) and
– Terminal is connected with p2901 via BICO, i.e. the control uses the output in
conjunction with the DO1 telegram (p0922 = 39x)
– Use of the terminal's output signal for integrated platform via high-speed bypass
channel of the controller (standard channel with DO1 telegram is always written in
parallel).
Basic information about the drive system
12.5 Inputs/outputs
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