Technology instructions
10.3 Motion control
S7-1200 Programmable controller
672 System Manual, V4.2, 09/2016, A5E02486680-AK
Closed loop motion control
10.3.4.1
You connect the closed loop axis on the PLC and the drive through one of two connections:
● Analog drive: This connection can use onboard, SB, or signal module (SM) analog I/O; it
does not use PTOs. You have the following analog I/O resolution available for your
application:
– Onboard I/O: 10 bit (lowest I/O resolution)
– Signal board (SB) I/O: 12 bit
– SM I/O: 14 bit (highest I/O resolution)
● PROFIdrive: This connection is a network solution and does not use PTOs.
The closed loop axis requires an encoder as well. You can connect encoders to the following
items:
● Encoder interface on the drive
● High-speed counters (HSC)
● Technology modules (TM)
● PROFIdrive encoder on PROFINET / PROFIBUS
You can have a maximum number of eight drives (or axes) for the PROFIdrive or analog
drive connection.
STEP 7 provides the configuration tools, the commissioning tools, and the diagnostic tools
for the "Axis" technology object.
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