YOKOGAWA FA-M3V e-RT3 Plus, Hardware Manual

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Appx. A1-5
IM 34M06C11-01E
Appendix A1.2 Restrictions due to the Number
of Slots
Determine the total sum W of slots occupied by all modules excluding the power supply,
fiber-optic FA-bus, fiber-optic FA-bus type 2, and FA-bus type 2 modules. Then check
that the value of W complies with restrictions placed by the maximum number of slots.
The maximum number of slots varies depending on the types of CPU modules used and
their combinations.
If F3SP21/22/25/28/35/38/53/58/59/66/67/71/76, F3FP36, F3BP20 and F3BP30
modules are used in combination, a maximum of 7 subunits can be added to the
system.
- When F3SP21/22/25/28/35/38/53/58/59/66/67/71/76, F3FP36, F3BP20, and
F3BP30, modules are used in combination, the maximum number of slots amounts
to 120. This number is only effective however, when 16-slot base modules are
used with both the main unit and each subunit, and the seven subunits are
connected in a daisy-chain or loop topology through fiber-optic FA-bus type 2 and
FA-bus type 2 modules.
Note
If subunits are divided into groups using fiber-optic FA-bus type 2 modules, the total
number of slots may become smaller than the value noted above depending on the
mode of such division. For more information on the calculation of the total sum, see the
Fiber-optic FA-bus Module and Fiber-optic FA-bus Type 2 Module, FA-bus Type 2
Module (IM 34M06H45-01E).