Siemens SIMOTION C Operating Instructions Manual page 72

Interfaces
3.8 I/O interface
Digital inputs (onboard)
The SIMOTION C has 18 digital inputs. These can also be interconnected via symbolic
assignment using variables as of SIMOTION V4.2 for C240 and C240 PN.
Switches or proximity encoders (2- or 3-wire encoders) can be connected. Addresses are
allocated in the hardware configuration.
The digital inputs can be used as:
● User-addressable process inputs (I0 to I11). The inputs are subject to a signal delay (see
The following inputs can be used for special functions:
● C230-2, C240: As inputs for measuring pulses for local measuring (M1, M2)
● C230-2, C240: As inputs for external zero mark signals (B1 to B4)
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Technical data (Page 171)) and are scanned in a cycle of 125 μs.
With a signal edge at the relevant input, the current actual values of one or more
encoders connected to X3 to X6 are measured with positioning accuracy to determine
lengths or distances.
The assignment of inputs is not fixed; the special use is activated in the SCOUT
engineering system during configuration of the Measuring Input TO via the measuring
input number.
With a signal edge at the relevant input, the current encoder value of the associated axis
is acquired with positioning accuracy in order to record the reference coordinates.
The assignment of the inputs to the encoders is fixed, and the special use is activated in
the SIMOTION SCOUT engineering system.
– B1 → axis 1 (encoder at X3)
– B2 → axis 2 (encoder at X4)
– B3 → axis 3 (Encoder at X5)
– B4 → axis 4 (encoder at X6)
SIMOTION C
Operating Instructions, 02/2012