
B–64113EN–1/01
15. PMC CONTROL FUNCTION
1041
Read signal for external data input
(ESTB)
Read completion signal for external
data input (EREND)
Search completion signal for external
data input (ESEND)
Cycle start lamp signal
(ST)
Cycle start signal
(STL)
Automatic operation signal
(OP)
External reset signal
(ERS)
Reset signal
(RST)
NC reset
2nd command
Search command is kept.
2nd program execution
Fig. 15.2
These signals provide for changing the tool compensation amount via the
PMC. When the offset number is specified by a program, data input from
the PMC is added to the offset amount. The offset amount can also be used
as input data itself by specifying the input signal.
When the machine tool is equipped with automatic tools or workpiece
measuring functions, the offset amount can be corrected using this
function, by inputting the error from the correct value into the CNC via
PMC.
If the tool compensation amount is externally input when offset number
0 is specified in a program (a offset cancel) in T series, the workpiece
coordinate system shifts by the entered quantity. The external tool
compensation range is 0 - "7.999mm or "0.7999 inch at a time.
2) External tool
compensation