Yaskawa MP900 Series Machine Controller for Standard Operation - Manual (Page 298)

5.2 Group Definitions
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5.2 Group Definitions
This section explains how to set definitions for the groups, which are important settings for exe-
cuting motion programs.
Groups can be defined only in offline mode and logging in.
If you are in online mode, log off and then log in again in offline mode to enable defining the group.
Group Definitions can be referenced in either online or offline mode.
5.2.1 Outline of Group Definitions
„ Groups
One group defines all of the axes for managing one set of control signals. For the MP940,
each group contains only one axis. The same axis cannot be defined in more than one group.
„ Group Registration
Several groups can be controlled by some Machine Controllers. For the MP940, however,
only one group can be controlled by each Machine Controller. The group is registered
mainly by defining the control signals and axis information.
For Machine Controllers for which four groups can be registered, four independent motion
programs are executed in parallel by one Machine Controller. At least one group must be
registered to execute the motion programs.
„ Number of Groups and Tasks
The number of groups and the number of tasks is set in the group definitions. The number of
motion programs executed in parallel will be the number of groups times the number of
tasks in each group.
For example, if there are three tasks in Group 1 and four tasks in Group 2, then seven motion
programs will be executed in parallel, as shown in the following diagram.