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Register Map for Process and Operation Type Variables
Loop Value Register Map
Revision 4 HC900 Hybrid Controller Communications User Guide 43
9/03
Address
(hex)
Register
(decimal)
Parameter Name Access Notes
0060 0097 Gain #2 (Prop Band #2 if active) R/W Floating Point
0062 0099 Three Position Step Motor
Deadband
R/W Floating Point in percent
0064 0101 Reset #2 R/W Floating Point in Repeats/Minute or
Minutes/Repeat as configured in the
HC900.
0066 0103 Rate #2 R/W Floating Point in Minutes
0068 0105 Cycle Time for Analog Scan R Floating Point in Seconds
006A 0107 LSP #1 R/W Floating Point in Engineering Units
006C 0109 LSP #2 R/W Floating Point in Engineering Units.
006E 0111 Alarm #2 SP #1 R/W Floating Point in Engineering Units.
0070 0113 Alarm #2 SP #2 R/W Floating Point in Engineering Units.
0074 0117 SP Low Limit R/W Floating Point in Engineering Units.
Operator Limit
0076 0119 SP High Limit R/W Floating Point in Engineering Units.
Operator Limit
0078 0121 Working Set Point R/W Floating Point in Engineering Units.
On a write to this register the instrument
will update the proper set point according
to the loop’s currently selected set point.
007A 0123 Output Low Limit R/W Floating Point in Engineering Units.
007C 0125 Output High Limit R/W Floating Point in Engineering Units.
007E 0127 Output Working Value R/W Floating Point in Engineering Units.
0086 0135 Ratio R/W Floating Point in Engineering Units.
0088 0137 Bias R/W Floating Point in Engineering Units.
Auto/Man bias block, value is Read-Only
008A 0139 Deviation R Floating Point in Engineering Units.
(SP-PV)
008E 0143 Manual Reset R/W Floating Point in Engineering Units.
0090 0145 Feed-forward Gain R/W Floating Point in Engineering Units.
0092 0147 Local Percent Carbon Monoxide R/W Floating Point in Engineering Units.
0094 0149 Furnace Factor R/W Floating Point in Engineering Units.
0096 0151 Percent Hydrogen R/W Floating Point in Engineering Units.
0098 0153 On/Off Output Hysterisis R/W Floating Point in percent of input span
009A 0155 Carbon Potential Dewpoint R/W Floating Point in Engineering Units
009C 0157 Three Position Step Motor Time R/W Floating Point in seconds