Panasonic FP3 Technical Manual page 146

8-6. Terminology
slot number:
stop bit:
system errors:
system register:
trailing edge differential:
140
Slot numbers are used for expressing the position of FP3/FP10S units except for the
CPU and power supply unit. The slot numbers are assigned for each unit, starting
from the unit in the slot nearest to the CPU. In the slot numbering system, all types
of backplanes are regarded as the 8-slot type and the number is assigned in the order:
CPU equipped master backplane, expansion backplane with board number 1, and
then the expansion backplane with board number 2, starting from slot number 0.
Master Backplane
Power supply unit
FP3 CPU
Slot number 0 1
Expansion Backplane
(board number 1)
Power supply unit
Slot number 8 9
Expansion Backplane
(board number 2)
Slot number 16 17 18 19 20 21 22 23
The last bit when a character is transmitted.
Errors resulting from the device or the environment.
The registers used only for system settings of the programmable controller.
A programming technique to operate a bit only for one scan at the moment its input
condition turns OFF from the ON state.
2 3 4 5 6 7
10 11 12 13 14 15
On five slot
backplanes, each of
the three open slots,
which actually do not
exist, is counted as
one slot.
On three slot
backplanes, each of
the five open slots,
which actually do not
exist, is counted as
one slot.