Loop Values; Table 6-3 Loop Values - Honeywell HC900 User Manual

6.4 Loop Values

About loop addresses
This table contains fixed addresses of Loop #1. See Table 6-1 for starting and ending fixed addresses
(hex) for Loop #2 through Loop #32. Each successive control loop is offset by 256 with the exception that
loop 25 has a new starting address and loop 26 – 32 are offset by 256. The loop number corresponds to the
PID block entry sequence during Process Control Designer configuration. The Modbus loop number
address for a loop can also be obtained from the Process Control Designer printout of Block Modbus
Addresses.
The addresses given in Table 6-3 do not necessarily apply to loops in the custom map. For custom
addresses view or print a report in HC Designer.
Function Code Support:
Reads – Function Code 3
Writes – Function Code 16 (10 hex) for preset of multiple registers (e.g., for floating point )
Writes – Function Code 6 for presetting an integer value
Fixed Fixed Parameter Name
Address Register
(hex) (decimal)
0040 0065 PV
0042 0067 Remote Set Point;
SP2
0044 0069 Working Set Point
0046 0071 Output
0048 0073 PV
004A 0075 Carbon Potential block
temperature
004C 0077 Gain #1 (Prop Band
#1 if active)
004E 0079 Direction
0050 0081 Reset #1
0052 0083 Rate #1
0054 0085 Cycle Time for Analog
Scan
0056 0087 PV Low Range
0058 0089 PV High Range
005A 0091 Alarm #1 SP #1
005C 0093 Alarm #1 SP #2
0060 0097 Gain #2 (Prop Band
#2 if active)
0062 0099 Three Position Step
Motor Deadband
Revision 13
April 2017

Table 6-3 Loop Values

Loop type
PID On/ Carb 3Pos AMB
Off
  
  
  
  
  

 
  
 
 
  
  
  
  
  
 
HC900 Process Controller Communications User Guide
Parameters accessible with Function Code 03, 06,10h
Access Notes
R Floating Point in Engineering Units.

R/W Floating Point in Engineering Units.
When the remote setpoint source is configured as
LSP2, the value can be written.
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.
R/W Floating Point in Engineering Units.

R Floating Point in Engineering Units.

R Floating Point in Engineering Units
R/W Floating Point . (in units per what was configured in
the HC900: Gain or Proportional Band)
R Floating Point
0.0=Direct; 1.0=Reverse
R/W Floating Point in Repeats/Minute or
Minutes/Repeat.
R/W Floating Point in Minutes
R Floating Point in Seconds

R Floating Point in Engineering Units.

R Floating Point in Engineering Units.

R/W Floating Point in Engineering Units.

R/W Floating Point in Engineering Units.

R/W Floating Point
R/W Floating Point in percent
Loop Values
49