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Note

Please note the following:

● The most significant data bit for the encoder's entire range of values is transmitted by the

encoder with the first cycle.

● Subsequent data bits transmitted by the encoder (or zeros) are not evaluated by

SIMOTION C.

● The encoder used in the example should be configured as follows:

– Encoder pulses per revolution: 4096

– Data width: 12

– Message length: 13 bits (or 21 bits or 25 bits)

– Message profile: Right-justified

Encoder supply 5 V

The 5 V supply voltage for the encoders is generated inside the module and is therefore present

at the Sub-D socket. This means you can supply the encoders via the connecting cable without

the need for additional wiring. The voltage supplied is protected electronically against short

circuits and thermal overload, and it is monitored. The encoder supply is not isolated from the

load power supply to the module.

Encoder supply 24 V

For encoders with an operating voltage of 24 V, the 24 VDC power is supplied to the Sub-D

sockets. This means you can supply the encoders via the connecting cable without the need

for additional wiring. The voltage supplied is protected electronically against short circuits and

thermal overload, and it is monitored. The encoder supply is not isolated from the load power

supply to the module.

Behavior of the integrated measurement electronics

Pulses from connected incremental encoders are quadrupled (for pulse quadruplication, see

figure "Signal shapes of incremental encoders").

The actual encoder values are latched servo-synchronously in the C230-2/C240.

Note

With certain selected set values for the position control cycle clock, the measured value

sampling in the C240 takes place at time Ti before the position control cycle clock time, see

"Actual value latch time" table, in chapter Technical data (Page 163). This behavior is similar

to that of PROFIBUS DP encoders.

Interfaces

4.6 Onboard measuring system interface (C230-2, C240)

SIMOTION C

64 Operating Instructions, 11/2016, A5E33441428B

Siemens SIMOTION User Manual

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