
B–63523EN–1/03
1. AXIS CONTROL
208
The following list summarizes how positional information such as
custom macro system variables and current coordinates from the PMC
window are read during synchronous, composite, or superimposed
control.
Positional information During synchronous
control
During composite
control
During superimposed
control
Absolute coordinate Readable Readable (*1) Readable (*2)
Machine coordinate Readable Readable Readable
End of each block Readable only for the mas-
ter axis
Readable (*1) Readable (*2)
Skip signal position Readable only for the mas-
ter axis
Unreadable Readable (*2)
(*1) The coordinates are represented in the coordinate system that is
effective during composite control. Their relationship with the
machine coordinate system differs from the relationship that exists
during independent control.
(*2) No superimposed control pulse is added.
Synchronous, composite, or superimposed control is terminated not only
when the corresponding synchronization signal becomes off but also
when the following conditions occur.
(1)Emergency stop
(2)Reset
(3)Servo alarm
(4)Servo off (*1)
(5)Overtravel
(6)Alarm related to synchronous, composite, or superimposed control
(7)P/S000 alarm
If one of the above conditions occurs for either path, it terminates
synchronous control, composite, and superimposed control for all axes.
If one of the above conditions occurs for one path during synchronous,
composite, or superimposed control, the other path is placed in a feed hold
state (during automatic operation) or interlock state (during manual
operation).
(*1) Setting parameter NMR (bit 0 of parameter No. 8161) specifies that
synchronous, composite, or superimposed control be not terminated
even when an axis under composite control enters a servo–off state.
(If an axis under synchronous or superimposed control enters a
servo–off state, synchronous, composite, and superimposed control is
terminated.
Reading the coordinates
during synchronous,
composite, or
superimposed control
Terminating
synchronous,
composite, or
superimposed control