Precautions When Allocating I/O Numbers For Slave Stations - Panasonic MEWNET-F Technical Manual

6.1.2 Precautions When Allocating I/O Numbers for Slave Stations

The starting I/O number for a station is the next number of the last I/O number for the previous station
number.The last I/O number of a station is determined according to the number of occupied I/O
points.For the station with the smallest station number, the starting I/O number is determined according
to the base word number.
FP2/FP3 slave station system (Slave unit)
Remote I/O numbers are allocated according to the I/O numbers used by the input/output units and
advanced unit installed on the master backplane.I/O numbers are allocated starting from the I/O unit
which is closest to the slave unit.
I/O Terminal Board
For FP I/O terminal board with MIL connectors and terminal block (transistor output), I/O numbers are
allocated in the order of 16 input and 16 output (32 points in total).
For the terminal block type [Relay output], 16 input and 16 output are used. However, the actual I/O
numbers which can be controlled by the master unit are 16 input and only 8 output.The highest 8 output
points (Y*8 to Y*F) can be used as internal relays.
I/O Terminal Unit
The number of I/O points used by an FP I/O terminal unit will vary, depending on the combination of
units.
Combination of units
Input primary unit
Output primary unit
Input primary unit and input expansion unit
Output primary unit and output expansion unit
Input primary unit and output expansion unit
Output primary unit and input expansion unit
Note1) 16 points are used by the 8-point unit.In case of output units, the highest 8 output points
(Y*8 to Y*F) can be used as internal relays.
Note2) When using teh units in combination, the I/O numbers are allocated as follows; Starting with the
primary I/O terminal unit when both of the units are the same I/O type.
Note3) Starting with the input type I/O terminal unit when the I/O types of two units are different.
When adding an input type expansion I/O terminal unit to an output type primary I/O terminal unit, the I/O
numbers which are allocated will be changed.
Reference: For informaiton on the allocation of I/O numbers, refer to respective user's manuals
for each devices.
I/O allocation
16X
16Y
32X
32Y
16X16Y
16X16Y
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