Analog Inputs - Siemens SINAMICS S120 Function Manual

Basic information about the drive system
14.6 Inputs/outputs
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
available.
● r0729 = 1: Output is assigned to the higher-level controller (PROFIBUS connection).
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
– Use of the terminal's output signal for integrated platform via high-speed bypass channel
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.
Access priorities
● Reparameterization output controller --> output drive via parameter p0738 ff
The drive output has higher priority than a standard controller output using the DO1
telegram, but direct access by the controller to the terminal (bypass) has higher priority than
the drive output.
When the output is reconfigured to the drive, the controller needs to cancel a bypass to the
terminals (if one has been set up) before the new configuration can take effect.
● Reconfiguration input drive --> output controller
The output of the controller has higher priority. This is the specified behavior.
The drive is notified of the change so that the affected application can issue an alarm.
● Reconfiguration output drive --> output controller
The output of the controller has higher priority.
This is the specified behavior.
The drive is notified of the change so that the affected application can issue an alarm/fault
message is necessary. Readback of the output information can cause problems in the drive,
i.e. the drive application checks the interconnection condition of "its" terminals. If the
terminal remains assigned to a drive I/O device as required by the drive function, but is
assigned simultaneously a controller terminal status, the drive function cannot be
guaranteed to work correctly.
Fault reaction to controller failure
The onboard I/Os assigned to the controller are switched to the safe state in response to a fault.
This also applies to terminals whose signals are transferred via the bypass channel of the
controller. This status is signaled by failure of the DO1 telegram (sign-of-life failure).
14.6.3

Analog inputs

Signal processing using the analog inputs is shown in the function diagrams listed below.
802
conjunction with the DO1 telegram (p0922 = 39x)
of the controller (standard channel with DO1 telegram is always written in parallel).
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Drive functions