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Register Map for Process and Operation Type Variables
User Defined Registers
90 HC900 Hybrid Controller Communications User Guide Revision 4
9/03
6.28 User Defined Registers
Each register can be assigned to a signal tag or variable defined in a function block diagram. The data type is
configurable to be floating-point, signed-16, unsigned-16, signed-32, or unsigned-32. Floating point, signed-32, and
unsigned-32 must start on an even hex address. 32-bit data uses the same byte-order format as defined for the port’s
double-register format. Writing a non-zero to a digital variable will set the variable to ON regardless of the data
type. Single register writes to 32-bit digital variables are permitted. Integer data is scaled based on the number of
decimal places defined for the variable/signal.
Table 6-35 User Defined Register Map
Address
(hex)
Register
(decimal)
Parameter Name Access Notes
B000 to
B3E7
85057 to
86056
User defined signal
or variable
Signal: R
Variable: R/W
Read only if a signal tag
Read/write if a variable