·397·
CNC 8035
(SOFT M: V15.3X)
(S
OFT T: V16.3X)
12
AXES CONTROLLED FROM THE
PLC
The PLC offers actions CNCEX and CNCEX1 to send commands to the CNC.
CNCEX sends commands to the CNC so it executes movements on one or several axes.
CNCEX1 sends commands to the CNC so it executes any kind of block.
The CNCEX action is executed through the execution channel of the PLC.
The CNCEX1 action is executed via main channel of the CNC and as long as the JOG keyboard
is enabled. Its execution can be interrupted by pressing [CYCLE STOP] or even canceled by
pressing [RESET].
If a CNCEX1 action is received when the JOG keyboard is disabled, the CNC ignores this command.
The programming format for these actions is:
CNCEX (ASCII block, Mark)
CNCEX1 (ASCII block, Mark)
By means of these actions, the PLC sends to the CNC the command indicated in the "ASCII Block"
to be executed.
If the "ASCII Block" has been accepted by the CNC, the PLC will set the indicated mark to "0" or
to "1" if otherwise. The CNC only indicates that the "ASCII Block" has been accepted. It is up to the
operator to verify whether the command has actually been executed by the CNC or not.
Example of how to use action CNCEX1 when using a tool changer controlled by the PLC.
1. The T executed last at the CNC is T1. Therefore, it is the active T.
2. A new tool is selected, for example T5.
If carried out by means of action CNCEX1, the change is made by the CNC and it assumes T5
as the new active tool.
If not carried out by means of action CNCEX1, the change is made by the PLC and T1 remains
as the active tool.
3. Then, an operation programmed with T1 is carried out.
If the change was made with action CNCEX1, the CNC detects the tool change (from T5 to T1)
and carries out the change.
If the change was not made with action CNCEX1, the CNC does not detect the tool change (T1),
it does not make the change and carries out the operation with the selected tool T5 with the
problems this may cause.
CNCEX (G1 U125 V300 F500, M200)
Sends to the CNC the command "G1 U125 V300 F500" so it executes a linear interpolation
of the U and V axes at a feedrate of F500 being the end point: U125 V300.
CNCEX1 (T5, M200)
Selects the tool T5 in the tool changer.
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