
B–63010EN/02
4. DESCRIPTION OF PARAMETERS
123
In the safety signal mode B (a guard open request is input, and the guard is
closed) with the dual check safety function, the CNC and monitor check
the machine position on each linear axis. If a machine position on a single
linear axis at least is beyond the safety position range (safety position
(negative direction) x machine position x safety position (positive
direction)), the guard unlock enable signal *LGD is set to 0 so that the
guard will not be unlocked. One condition for setting the guard unlock
enable signal *LGD to 1 (enabling guard unlock) is that the machine
position is within the safety position range on all linear axes.
In the safety signal mode C (a guard open request is input, and the guard is
open), the CNC and monitor check the machine position on each linear
axis. If the machine position on at least one linear axis is beyond the safety
position range, a servo alarm is raised.
NOTE
A machine position check is carried out on a linear axis. A
machine position check is not performed on a rotation axis.
A machine position check is carried out on an axis on which
the reference position is established. A machine position
check is not performed on an axis on which the reference
position is not established.
1945 Safety input signal check timer for dual check safety function
NOTE
When this parameter has been set, the power must be
turned off before operation is continued.
[Data type] Word
[Unit of data] ms
[Valid data range] 0 to 32767
An input signal related to dual check safety (safety input signal) can be
input through the PMC to the CNC or through FSSB to the monitor. The
CNC and monitor continuously exchange their input signals and monitor
each other. If a difference exceeding the time of the safety input signal
check timer is found between the signals input through the two paths, a
servo alarm is raised. If 16 or a smaller value is set, 16 ms is assumed.
1946 MCC shut–off test timer for dual check safety function
NOTE
When this parameter has been set, the power must be
turned off before operation is continued.
[Data type] Word
[Unit of data] ms
[Valid data range] 0 to 32767