Siemens SIMATIC S7-1200 - Page 712

Technology instructions
10.3 Motion control
S7-1200 Programmable controller
712 System Manual, V4.2, 09/2016, A5E02486680-AK
Table 10- 49 Default address assignments of the pulse and direction outputs
Usage of outputs for motion control
Pulse
Direction
PTO1
Built-in I/O
Q0.0
Q0.1
SB I/O Q4.0 Q4.1
PTO2
Built-in I/O
Q0.2
Q0.3
SB I/O
Q4.2
1
Q4.3
1
PTO3
Built-in I/O
Q0.4
2
Q0.5
2
SB I/O
Q4.0
Q4.1
PTO4
Built-in I/O
Q0.6
3
Q0.7
3
SB I/O
Q4.2
Q4.3
1
Outputs Q4.2 and Q4.3 are only available on the SB 1222 DQ4.
2
The CPU 1211C does not have outputs Q0.4, Q0.5, Q0.6, or Q0.7. Therefore, these outputs can-
not be used in the CPU 1211C.
3
The CPU 1212C does not have outputs Q0.6 or Q0.7. Therefore, these outputs cannot be used in
the CPU 1212C.
4
This table applies to the CPU 1211C, CPU 1212C, CPU 1214C, CPU 1215C, and CPU 1217C
PTO functions.
Drive interface
For motion control, you can optionally configure a drive interface for "Drive enabled" and
"Drive ready". When using the drive interface, the digital output for the drive enable and the
digital input for "drive ready" can be freely selected.
Note
The firmware will take control through the corresponding pulse and direction outputs if the
PTO (Pul
se Train Output) has been selected and assigned to an axis.
With this takeover of the control function, the connection between the process image and I/O
output is also disconnected. While the user has the possibility of writing the process image of
pulse a
nd direction outputs via the user program or watch table, this is never transferred to
the I/O output. Accordingly, it is also not possible to monitor the I/O output via the user
program or watch table. The information read merely reflects the value of the
process image
and does not match the actual status of the I/O output in any respect.
For all other CPU outputs that are not used permanently by the CPU firmware, the status of
the I/O output can be controlled or monitored via the process image, as usual.