
B–64113EN–1/01
2. PREPARATIONS FOR OPERATION
134
When the tool tries to moved beyond a stored stroke check limit, an alarm
is displayed and the tool is decelerated and stopped.
When the tool enters a forbidden zone and an alarm is generated, the tool
may only be moved in the direction from which the tool came.
Parameters (Nos. 1320, 1321 or Nos. 1326, 1327) define the boundary.
The forbidden zone lies outside the defined check limits. The machine
tool builder usually sets this zone to permit maximum stroke.
The parameters used for stroke check can be switched by a signal.
Parameters can be used to change the stroke check method as follows (M
series only):
D For a manual operation, setting both the BFA (bit 7 of No. 1300) and
OTF (bit 5 of No. 1301) parameters to 1 causes an alarm to be issued
on the border of the forbidden area and the machine to stop
accordingly.
D For a manual operation, setting the NAL (bit 1 of No. 1300) to 1 causes
the stroke limit reached signals +OT1 to +OT4 and –OT1 to –OT4
<F124 and F126> to be output without detecting an alarm condition.
Setting the OF1 (bit 4 of No. 1301) parameter to 1 causes an alarm to be
released when the axis enters a movable range without using a reset.
[Classification] Input signal
[Function] Selects stroke check 1–I (parameter Nos. 1320 and 1321) or stroke check
1–II (parameter Nos. 1326 and 1327).
[Operation] When this signal is set to 1, the control unit operates as follows:
– Checks stroke check 1 on the basis of parameter Nos. 1326 and 1327,
instead of parameter Nos. 1320 and 1321.
NOTE
If the bit 0 (DLM) of parameter No.1301 is set to 1, this signal
is disabled.
2.3.2
Stored Stroke Check 1
General
Automatic alarm
releasing
Signal
Stored stroke check
select signal EXLM
<G007#6>