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Rockwell Automation Publication 2080-UM002L-EN-E - November 2021
Chapter 7 Motion Control
Conditions for Successful Homing
For homing operation to be successful, all configured switches (or sensors)
must be properly positioned and wired. The correct position order from the
most negative position to the most positive position—that is, from the
leftmost to the rightmost in the homing setup diagrams in this section—for
the switches are:
1. Lower Limit switch
2. ABS Home switch
3. Upper Limit switch
During MC_Home function block execution, the home position will be reset,
and the soft limits mechanical position will be recalculated. During homing
sequence, the motion configuration for the soft limits will be ignored.
The homing motion sequence discussed in this section has the following
configuration assumptions:
1. Homing direction is configured as negative direction;
2. The Lower limit switch is configured as enabled and wired;
The different homing modes, as defined in
, can have different, but
still similar motion sequence. The concept discussed below is applicable to
various homing configurations.
Table 16 - Homing Modes
Homing Mode
Value
Homing Mode Name
Homing Mode Description
0x00
MC_HOME_ABS_SWITCH
Homing process searches for Home Absolute switch.
0x01
MC_HOME_LIMIT_SWITCH
Homing process searches for limit switch.
0x02
MC_HOME_REF_WITH_ABS
Homing process searches for Home Absolute switch plus
using encoder reference pulse.
0x03
MC_HOME_REF_PULSE
Homing process searches for limit switch plus using encoder
reference pulse.
0x04
MC_HOME_DIRECT
Static homing process with direct forcing a home position
from user reference. The function block will set current
position the mechanism is in as home position, with its
position determined by the input parameter, “Position”.
IMPORTANT
If axis is powered On with only one direction enabled, the MC_Home function
block (in modes 0, 1, 2, 3) will generate an error and only MC_Home function
block (mode 4) can be executed. See MC_Power function block for more
details.
Содержание Allen-Bradley Micro850
Страница 12: ...12 Rockwell Automation Publication 2080 UM002L EN E November 2021 Preface Notes ...
Страница 36: ...36 Rockwell Automation Publication 2080 UM002L EN E November 2021 Chapter 2 About Your Controller Notes ...
Страница 44: ...44 Rockwell Automation Publication 2080 UM002L EN E November 2021 Chapter 3 Install Your Controller Notes ...
Страница 120: ...120 Rockwell Automation Publication 2080 UM002L EN E November 2021 Chapter 7 Motion Control Notes ...
Страница 156: ...156 Rockwell Automation Publication 2080 UM002L EN E November 2021 Chapter 9 Controller Security Notes ...
Страница 184: ...184 Rockwell Automation Publication 2080 UM002L EN E November 2021 Chapter 10 Using microSD Cards Notes ...
Страница 226: ...226 Rockwell Automation Publication 2080 UM002L EN E November 2021 Appendix C Quickstarts 10 Click Finish to complete ...
Страница 248: ...248 Rockwell Automation Publication 2080 UM002L EN E November 2021 Appendix C Quickstarts Notes ...
Страница 262: ...262 Rockwell Automation Publication 2080 UM002L EN E November 2021 Appendix D User Interrupts Notes ...
Страница 272: ...272 Rockwell Automation Publication 2080 UM002L EN E November 2021 Appendix E Troubleshooting Notes ...