
17.PMC CONTROL FUNCTION B-63943EN-1/02
- 1898 -
Path 2
Path 1
PMC CNC
Group 2 command
Group 1 command
Group 2
Group 1
DI / DO
First axis control
Second axis control
Third axis control
Fourth axis control
Fig. 17.1.1 (b) Example of correct relationships between groups and axes
In Fig. 17.1.1 (c) Example of incorrect relationships between groups
and axes, the first and second axes specified with group 1 belong to
path 1, but the third axis specified with group 1 belongs to path 2, so
that an intended operation is not performed.
Path 2
Path 1
PMC CNC
Group 2 command
Group 1 command
Group 2
Group 1
DI / DO
First axis control
Second axis control
Third axis control
Fourth axis control
Fig. 17.1.1 (c) Example of incorrect relationships between groups and axes
As mentioned earlier, in PMC axis control, group-by-group signal
addresses are allocated in the signal area of each path, but PMC axis
control and multi-path control are independent of each other.
So, from the path to which group-by-group signal addresses are
allocated, commands can be issued to axes that belong to another path.
In this case, however, check that the target axes belong to the same
path.
In Fig. 17.1.1 (d) Commands to different paths, the group-by-group
signal addresses of group 1 are allocated to path 1, and the
group-by-group signal addresses of group 5 are allocated to path 2.
(See Table 17.1.1 (b) Allocation of group-by-group signals.)
Group 1 can issue commands to the axes that belong to path 2.
Similarly, group 5 can issue commands to the axes that belong to path
1.