
B-63943EN-1/02 17.PMC CONTROL FUNCTION
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Signal detail (Related signals)
The signals related to PMC axis control are detailed below.
The [Function] field and [Operation] field provide descriptions related
to PMC axis control. For the general functions of the signals, see the
description of each signal.
(1) External deceleration signals 1 *+ED1 to *+ED8 <G118>, *-ED1 to *-ED8 <G120>
(2) External deceleration signals 2 *+ED21 to *+ED28 <G101>, *-ED21 to *-ED28 <G103>
(3) External deceleration signals 3 *+ED31 to *+ED38 <G107>, *-ED31 to *-ED38 <G109>
[Classification] Input signal, axis-by-axis signal)
[Function] Decelerates the movement along a specified axis to a parameter-set
feedrate.
[Operation] While a signal is set to 0 for an axis, the feedrate along the axis in the
specified direction can be forcibly decelerated to a certain feedrate
(external deceleration feedrate) set by a parameter (dependent on the
type of command).
If the feedrate is lower than the external deceleration feedrate,
however, the specified feedrate continues to be used.
The feedrate for other axes with these signals not set to 0 is not
affected.
For details, refer to the specifications of the external deceleration
function.
A signal is available for each controlled axis and for each direction.
Each signal name includes the sign + or - for direction indication, and
the number at the end of each signal name indicates a controlled axis
number. These signals are shared by the CNC.
* x
ED y z
z
1 : Feed along the first axis is decelerated.
2 : Feed along the second axis is decelerated.
3 : Feed along the third axis is decelerated.
y
None: Follows external deceleration setting 1.
2 : Follows external deceleration setting 2.
3 : Follows external deceleration setting 3.
x
+ : Feed in the positive direction is decelerated.
- : Feed in the negative direction is decelerated.
When any of the following axis control command is specified while
the parameter EDC (No. 8005#0) is held at 1, the external deceleration
function becomes effective:
(1) Rapid traverse (EC0g to EC6g : 00h)
(2) Cutting feed - feed per minute (EC0g to EC6g : 01h)
(3) Reference position return (EC0g to EC6g : 05h)
(4) Continuous feed (EC0g to EC6g : 06h)
(5) First reference position return (EC0g to EC6g : 07h)
(6) Second reference position return (EC0g to EC6g : 08h)