Siemens CU240S DP-F - Digital Inputs (DI)

Functions
8.3 Digital inputs (DI)
Control Units CU240S
Operating Instructions, 11/2006, A5E00766042B AA
8-13
8.3 Digital inputs (DI)
Data
Quantity: 6 … 9 + 2 (depends on CU variant)
Parameter range: P0701 … P0712, P0713
r0720 … P0724
Function chart number: FP2000, FP2200
Features:
• cycle time:
2 ms
• switch-on threshold:
9.6 V
• switch-out threshold:
8.6 V
• electrical features:
electrically isolated, short-circuit proof
Description
External control signals are required for an inverter to be able to operate autonomously.
These signals can be entered using a serial interface as well as using digital inputs (see
figure below). The SINAMICS G120 has depending on CU variant up to 9 digital inputs which
can be expanded by using the 2 analog inputs. The digital inputs can be freely programmed
to create a function. Regarding the programming, it is possible to directly assign the function
using parameters P0701 … P0713 or to freely program the function using BICO technology.
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Figure 8-10 Digital inputs
The number of available digital inputs is displayed in parameter r0720. The logical states of
the digital inputs can be de-bounced using P0724 and read-out using parameter r0722
(BICO monitoring parameter). Further, this parameter is used for BICO parameterization of
the digital inputs (refer to BICO parameterization in the following section).