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LR area data will not be accurate if the next larger unit number is set on an-
other PC Link Unit and no error indication will be made.
When a PC Link Unit is set for double allocation, the RUN and Error Flags for
both the assigned unit number and those for the next larger unit number will
operate according to the status of the PC Link Unit.
Pin 8, SW7 Allocation
OFF Normal
ON Double
Only these words
allocated normally.
LR Area
for Unit n
Words
for
Unit 0
Words for both Unit n
and Unit n+1 allocated
when pin 8 is turned on.
Words
for Unit
n+1
Words
for Unit
n
4-2 C500 PC Link Units
4-2-1 Nomenclature, Switches, and Indicators
The basic names and functions of PC Link Unit components are given below.
LK009-V1
RS-485 connector
Used to connect the PC Link
Unit to another PC Link Unit or
to a Link Adapter.
DIP switch cover
Remove with a regular
screwdriver to access the
DIP switch used to set the
unit number on all PC Link
Units and to set the number
of LR bits in the Subsystem
on Unit 0.
Display
Employed in
either of two ways
depending on the
DIP switch setting
on the back of the
PC Link Unit. (see
below)
Note
C500 PC Link Units Section 4-2