There are approximately 50 types of modules in the 9000 series meter
architecture; the 9000 series meter has 46 different types. Most 9000 series
meters can support several instances of a certain module type (for example,
the 9000 series meter supports 16 Thermal Demand modules, 20 Periodic
Timer modules and one Clock module).
The Registers
Each module has one or more output registers, and most modules have
Setup registers. (A module’s inputs can be thought of as a link to the output
registers on other modules.)
There are different types of registers, classified by the type of data they
accept. When you want to change a module’s configuration, you must
supply the type of data that is appropriate for the register you are
configuring. All of the configuration tools discussed in this chapter prevent
you from entering the wrong type of data into a register, but they do not
prevent you from entering the wrong value. As any changes to a register’s
value alters the operation of the device, exercise caution when making
configuration changes.
Module Linking
Module Linkage is a connection from the output of one module to the inputs
of other modules. You can link modules together by assigning the input of
one module to the output register of another module. Data received by the
module through a module's input is then processed.
Module Linking Restrictions
You can only link each module once; however, you can link one output to
one or more different inputs. Circular links are not permitted. You can not
link one module's output to its input, or to the input of any module
preceding it. The only exception to the circular linkage restriction is the
Feedback module. For more details, refer to the
Advanced Meter
Configuration Reference Guide
.