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

Basic information about the drive system
12.5 Inputs/outputs
● 9402 Bidirectional digital inputs/outputs (DI/DO 16 ... DI/DO 23)
● 9560 Bidirectional digital inputs/outputs (DI/DO8 and DI/DO 9)
● 9562 Bidirectional digital inputs/outputs (DI/DO 10 and DI/DO 1)
● 9661 Bidirectional digital inputs/outputs (DI/DO 0 and DI/DO 1)
● 662 Bidirectional digital inputs/outputs (DI/DO 2 and DI/DO 3)
12.5.3

Use of bidirectional inputs/outputs on the CU

Description
The bidirectional inputs/outputs on terminals X122 and X132 on the CU (DO1) can be used
by a drive DO as well as a higher-level control (resource sharing).
The assignment to a terminal is defined by means of BICO interconnections, which are either
connected to a control by DO1 telegram p0922 = 39x and to a drive DO.
The setting of parameter p0729 indicates how a digital output has been assigned to a drive
CU, i.e. whether the output of an onboard terminal X122 or X132 is assigned directly to the
CU or connected via PROFIBUS to a higher-level control.
● r0729 = 0: Output is assigned to the drive CU or terminal output is not available.
● r0729 = 1: Output is assigned to the higher-level control (PROFIBUS connection).
Parameter r0729 is updated if
● the direction of the onboard terminals changes (p0728)
● the signal sources for the outputs (p0738ff) are changed.
Access priorities
● Reconfiguration output control --> output drive via parameter p738ff
● Reconfiguration input drive --> output control
The output of the control 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 control
The output of the control has higher priority.
584
Assignment to the control means:
– Terminal is parameterized as output x (p0728.x =1) and
– Terminal is BICO-connected with p2901, i.e. the control uses the output in conjunction
with the DO1 telegram (p0922 = 39x) as standard
– Use of the terminal's output signal for integrated platform via high-speed bypass
channel of the control (standard channel with DO1 telegram is always written in
parallel).
The drive output has higher priority than a standard control output using the DO1
telegram, but direct access by the control to the terminal (bypass) has higher priority than
the drive output.
When the output is reconfigured to the drive, the control needs to cancel a bypass to the
terminals (if one has been set up) before the new configuration can take effect.
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
Drive functions