Installation manual
CNC 8035
LOGIC CNC INPUTS AND OUTPUTS
General logic inputs
10.
(SOFT M: V15.3X)
(S
OFT T: V16.3X)
·335·
The retracing function ends in the following cases:
• When the previous 75 blocks are retraced.
• When retraced all the way to the beginning of the program.
• When retracing back to block G51 (turn look-ahead on).
• When finding a block that contains an M function (only if RETRACAC = 1).
• When finding a block that contains an S or a T function.
• When finding a high-level language block.
In all cases, the CNC activates the RETRAEND (M5522) signal to let the PLC know that all possible
blocks have been executed.
While the retracing function is active, neither tool inspection nor MDI operations are possible.
The Retracing function cannot be activated while a canned cycle is active.
ACTLIM2 (M5052)
The PLC sets this signal high to "tell" to the CNC to activate the second travel limits set by means
of variables LIMPL(X-C) and LIMMI(X-C).
The second travel limit of each axis will be taken into account if the first one has been set using a.m.p.
LIMIT+ (P5) and LIMIT- (P6).
HNLINARC (M5053)
This signal is used when either the "path handwheel" or "path jog" work mode has been selected
using general input "MASTRHND (M5054)". It allows selecting the type of movement.
M5053 = 0 Linear path.
M5053 = 1 Arc path.
For a linear path, the path angle must be indicated by the MASLAN variable and for an arc, the center
coordinates must be indicated by the MASCFI and MASCSE variables
Variables MASLAN, MASCFI and MASCSE may be read and written from the CNC, DNC and PLC.
MASTRHND (M5054)
The PLC sets this signal high to "tell" the CNC to activate the "path handwheel" or the "path jog"
mode.
M5054 = 0 Normal work mode with handwheels or jog keys.
M5054 = 1 "Path handwheel" or "path jog" function on.
EXRAPID (M5057)
The CNC only takes this signal into account if parameter RAPIDEN has been set to ·1· or ·2·.
If the PLC sets this signal high, the programmed movements are executed as follows.
"RAPIDEN" = 1 When the mark is activated, the programmed movements are executed
in rapid. There is no need to press the "rapid" key.
RAPIDEN = 2 When the mark is activated, the "rapid" key is enabled. The key must be
pressed to make movements in rapid; in other words, both the key and the
mark must be active.
When the signal is set back low, the movements are executed at the programmed feedrate.
The treatment which this signal receives is similar to that given to the rapid feedrate key on the control
panel.
When working with G51 active, it must be borne in mind that several blocks may go
by from the moment the RETRACE mark until the machine begins retracing. Also,
the look-ahead calculations will be different when moving forth and when moving
back and, consequently both tool paths may be slightly different.
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