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Mapping the I/O
STEP 7-Micro/WIN SMART enforces a fixed output assignment for PWM and Axis of Motion.
P0 and P1 outputs
At a minimum, any axis that is enabled has a P0 output pin configured for it. It may also have
P1 output if its "Phase" configuration is anything other than "Single-phase (1 output)". Refer
to the "Editing default input and output configuration" section for more information. These
output pins are hard-coded to a specific output, depending on the following criteria:
Axis 0
Axis 1
Axis 2
DIS outputs
If an axis has a DIS output configured, then an entry is present in the mapping table for that
output. The DIS output is also hard-coded to specific outputs based upon the following rules:
● DIS for Axis 0 is always configured for Q0.4.
● DIS for Axis 1 is always configured for Q0.5.
● DIS for Axis 2 is always configured for Q0.6.
Pulse output units are connected to standard 24V outputs.
S7-200 SMART
System Manual, 09/2015, A5E03822230-AC
P0 for Axis 0 is always configured for Q0.0.
•
P1 for Axis 0 is configured for Q0.2 if the "Phase" for the axis is not configured to
•
"Single phase (1 output)".
P0 for Axis 1 is always configured for Q0.1.
•
P1 for Axis 1 is mapped in two possible locations based upon axis configuration as
•
follows:
–
If the "Phase" for Axis 1 is configured for "Single-phase (1 output)", then no P1
output is assigned.
–
If the "Phase" for Axis 1 is configured for "Two-phase (2 output)" or "AB quadra-
ture phase (2 output)", then P1 is configured for Q0.3.
–
Else, P1 for Axis 1 is configured for Q0.7.
P0 for Axis 2 is always configured for Q0.3.
•
P1 for Axis 2 is configured for Q1.0 if the "Phase" for the axis is not configured to
•
"Single phase (1 output)".
Axis 2 is not available for use if the configured "Phase" for Axis 1 is configured to
•
"Two-phase (2 output)" or "AB quadrature phase (2 output)".
Open loop motion control
12.5 Configuring an Axis of Motion
495
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