For loader control, the following parameters must always be set as
When bit 7 of parameter No. 8100 is set to 0, servo motor activation is
simultaneously started for all axes after activation of all servo motors on
the NC and loader sides has become possible. So, if the emergency stop
state is set, or a servo alarm is issued on a loader control axis because of
incorrect servo parameter setting, for example, the NC holds reset
processing. That is, the NC cannot exit from reset processing until
activation on the loader control side has become possible.
When bit 7 of parameter No. 8100 is set to 1, synchronous activation is
not performed, activation instead being started independently. So, the NC
need not hold reset processing.
So, when the loader is to be started after the NC has successfully started,
set bit 7 of parameter No. 8100 to 1 for both the NC and loader. If this
bit is set to 0, the NC does not exit from reset processing after power–on
until the emergency stop state is released and provided no servo alarms
are issued for any axis.
In cases where the NC and loader share a two–axis amplifier so that the
NC uses one axis and the loader uses the other, however, always set this
bit to 0.
Set bit 3 of parameter No. 3003 to 1. Otherwise, movement along any axis
may not be possible.
Set bit 4 of parameter No. 3402 to 1. Otherwise, cutting feed may not be
This bit is used to ignore hardware overtravel.
When the overtravel limit signals (G110, G112) are not used, and bit 5 of
parameter No. 3004 is set to 1, overtravel alarms 506 and 507 are not
Specify 768 in this parameter.
If this parameter is not set, and version B251–01 is being used, alarm 972
may be issued when a large ladder program is executed.
This parameter need not be set when later versions are being used.
Special Parameters to
Bit 7 of parameter
Bit 3 of parameter
Bit 4 of parameter
Bit 5 of parameter
Parameter No. 8710
(This parameter needs to
be set only when version
B251–01 of the Series
16/18–MODEL A loader
control is being used.)