
B–63510EN/01
4. DESCRIPTION OF PARAMETERS
69
By using this parameter, calculate the machine position from the
expression below.
Machine position =
M–S– (parameter No. 1877)
λ
Rounded off λ +S
M: Absolute motor position (detection unit)
S : Data of offset from the inductosyn (detection unit)
λ: One–pitch interval of the inductosyn (detection unit) (Parameter No.
1876)
The remainder of (M–S) divided by λ approaches 0. (Normally, set the
value of diagnostic data No.380.)
1880 Abnormal load detection alarm timer
[Data type] Word axis
[Unit of data] ms
[Valid data range] 0 to 32767 (200 mse is assumed when 0 is set)
This parameter sets the time from the detection of an abnormal load until a
servo alarm is issued. The specified value is rounded up to the nearest
integral multiple of 8 msec.
[Example] When 30 is specified, the value is rounded up to 32 (msec).
1881 Group number when an abnormal load is detected
[Data type] Byte axis
[Valid data range] 0 to 8
This parameter sets the group number of each axis, used when an
abnormal load is detected.
If an abnormal load is detected for an axis, only the movement along the
axes of the group containing the axis with the abnormal load is stopped. If
0 is set for an axis, movement along that axis is stopped whenever an
abnormal load is detected for any axis.
Example: Assume that the following settings have been made. If an
abnormal load is detected for the third axis, movement along
the first, third, and fourth axes is stopped. If an abnormal load
is detected for the fourth axis, movement along the fourth axes
is stopped.
Parameter No.1881 Setting
(First axis) 1
(Second axis) 2
(Third axis) 1
(Fourth axis) 0
NOTE
This parameter is enabled when the ANA parameter (bit 5 of
parameter No.1804) is 1.