1 Hold down both the <CAN> and <5> keys, and turn on the power.
All loader memory areas are cleared. (The NC memory is not affected.)
At this time, the symptom described in 2 of Section 3.2.2 arises.
To check that the NC starts, set bit 7 of parameter No. 8100 to 1, then turn the power off then back on.
2 The subsequent operations are the same as in 3 through 6 of Section 3.2.2.
D Why memory must be cleared:
When the memory power is not turned on, the states of the
bits are undefined. If RAM is read in such a state, there is
very high probability that a RAM parity alarm will be issued.
(If an NC parity error occurs, an alarm between No. 910 and
No. 919 is issued. If a loader parity error occurs, alarm No.
972 is issued.)
D When the macro executor RAM must be inserted into the
loader control board (with the loader for the Series
16/18–MODEL A only)
The RAM board for macro executor debugging is not
cleared by turning on the power. So, a RAM parity error may
occur if the RAM board is not cleared. However, macro RAM
is cleared by activating the P–code loader. This means that
the RAM board can be inserted at any time after the RAM
is cleared at power–on and or at macro RAM clear using the
When Loader Control