Signal Interfaces - Siemens SINAMICS S120 System Manual

7.4 Commissioning example for an infeed with voltage and frequency control for an island grid.
7.4.7

Signal interfaces

Description
The following signals are required by the drive unit for operation and/or provided for
monitoring purposes.
Signals transferred to the drive unit
This involves a list of typical signals for communication with the higher-level control system.
Table 7- 6 Signals transferred to the drive unit
Parameter Drive Object
p0840[0] INFEED
p5401 INFEED
p3611 INFEED
p5406[0...1] INFEED
p5416[0...1] INFEED
p5451 INFEED
Grid infeed
System Manual, 04/2015, A5E03347436A
Signal
BI: ON/OFF1
Sets the signal source for control word 1 bit 0
(ON/OFF1).
BI: Grid control activation
1 signal: Activation of grid droop control and
deactivation of closed-loop DC-link voltage con-
trol/closed-loop current control.
0 signal: Activation of grid droop control and
deactivation of closed-loop DC-link voltage con-
trol/closed-loop current control.
CI: Infeed reactive current supplementary set-
point
Reactive current setpoint for operation with
p5401 = 0
CI: Grid droop control frequency droop supple-
mentary setpoint
dynamic supplementary frequency setpoint for
operation with p5401 = 1
CI: Grid droop control voltage droop supplemen-
tary setpoint
dynamic supplementary voltage setpoint for
operation with p5401 = 1
BI: Current hysteresis controller operating mode
Parallel operation with diesel generator
1 signal: Combined operation
(INFEED and additional infeeds together supply
the island grid, INFEED is not the power generat-
ing unit with the highest short-circuit power)
0 signal: Operation by itself
(INFEED exclusively supplies the island grid
and/or is the power generating unit with the
highest short-circuit power)
Commissioning
Type Unit
Bit -
Bit -
Unsigned32 / -
FloatingPoint32
Unsigned32 / -
FloatingPoint32
Unsigned32 / -
FloatingPoint32
Bit -
83