Interrogate Plc Operands In The Nc Program (Wait For) - HEIDENHAIN TNC 426 PB/M Technical Manual

7.3.6 Interrogate PLC Operands in the NC Program (WAIT FOR)

7 – 38
With FN20: WAIT FOR you can interrupt the NC program until the condition
programmed in the FN20 block is fulfilled. These conditions can be
comparisons of a PLC operand with a constant. Permitted PLC operands: M,
B, W, D, T, C, I, O
Operator
==
!= or <>
<
>
<=
>=
If you enter no condition, the interruption will continue until the operand = 0.
Examples:
FN20: WAIT FOR I10==1
Continue the NC program, if PLC input I10 is set.
FN20: WAIT FOR I10
Continue the NC program, if PLC input I10 equals zero.
FN20: WAIT FOR B3000>255
Continue the NC program, if the content of B3000 is greater than 255.
Function
Equal
Not equal
Less than
Greater than
Less than or equal
Greater than or equal
HEIDENHAIN Technical Manual TNC 426, TNC 430