Parameters accessible with Function Codes 04
January 09 UDA2182 Communications User Guide 31
11. Parameters accessible with Function Code 04
Function code 04 provides read access to the read-only input registers. The input registers contain the
signals of the UDA2182.
11.1 Signals
Signals provide a means for the user to remotely read status values within the UDA database. In the
function block model, you can think of them as values connected to the output of function blocks. Since
they are controlled by the function block algorithm, they are read-only. Signals can be either analog
(floating-point) or digital (long) depending on the type of output it is monitoring. They are permanently
connected to the function block outputs. In other words, the user doesn’t have to configure the connection
to make the output visible. The output value is always visible.
11.2 Input Registers Map
Table 11-1 describes the input register map for Function Code 04.
Conversion between Address (Hex) Number and Register (Decimal) Number
To convert the address number to the register number, convert the address from hexidecimal to decimal
and add 30,001. Registers are addressed starting at zero: registers 30,001-30,016 are addressed as 0-15. To
convert the register number to the address number, subtract 30,001 from the register and convert to hex.
Table 11-1 Holding Registers Map
Address
(hex)
Register
(decimal)
Parameter Name Type Notes
0000 30001
PV 1
Float
Input 1 Process Value
0002 30003
PV 2
Float
Input 2 Process Value
0004 30005
Temperature 1
Float Input 1 Sensor Temperature
0006 30007
Temperature 2
Float Input 2 Sensor Temperature
0008 30009
Alarm1
Long 0=Inactive; 1=Active
000A 30011
Alarm2
Long 0=Inactive; 1=Active
000C 30013
Alarm3
Long 0=Inactive; 1=Active
000E 30015
Alarm4
Long 0=Inactive; 1=Active
0010 30017
Alarm group 1 output
Long On if any Analog Alarm is active
0012 30019
Alarm group 2 output
Long On if any PID Control Alarm is
active
0014 30021
Analog monitor 1 output
Long
0016 30023
Analog monitor 2 output
Long
0018 30025
Analog monitor 3 output
Long
001A 30027
Analog monitor 4 output
Long
001C 30029
Logic 1 output
Long
001E 30031
Logic 2 output
Long