Free/Fix Option; Table 7-5 Free/Fix Option - Hitachi S10mini LQS070 Hardware Manual

7 COMMUNICATION FUNCTION

7.5 FREE/FIX Option

FREE/FIX
option
Slot allocation
Common to 2-, 4-, and 8-slot mount bases
Merits • I/O modules can be mounted freely in any slots.
• A pulse counter, DI/DO mixed module, and
modules equipped with input/output such as DI
with latch can be used.
Demerits • The number of input/output data bytes is larger
when the FIX option is selected.
• The area occupied by the master is larger when
the FIX option is selected.

Table 7-5 FREE/FIX Option

FREE
PS D.ST
Input/output modules can be
optionally mounted in any
slots.
8-slot mount base
PS D.ST
4-slot mount base
PS D.ST
Slots dedicated
to input modules
2-slot mount base
PS D.ST
Slots dedicated
to input modules
• The number of input/output data bytes is
less in comparison when FREE option is
selected.
• The area occupied by the master is less in
comparison when FREE option is
selected.
• Slots to mount input/output module are
predetermined.
• A pulse counter, DI/DO mixed module,
and modules equipped with input/output
such as DI with latch cannot be used.
− 64 −
FIX
Slots dedicated Slots dedicated to
to input modules output modules
Slots dedicated to
output modules
Slots dedicated to
output modules