Honeywell HC900 - Manual (Page 57)

Revision 10 HC900 Hybrid Controller Communications User Guide 49
12/07
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 Hybrid Control Designer configuration. The Modbus loop number
address for a loop can also be obtained from the Hybrid 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
Table 6-3 Loop Values
Loop type Fixed
Address
(hex) Fixed
Register
(decimal) Parameter Name
PIDOn
/
Off
Carb3Pos AMB
Access Notes
0040 0065 PV 9 9 9 9 R Floating Point in Engineering Units.
0042 0067 Remote Set Point;
SP2
9 9 9
R/W Floating Point in Engineering Units.
When the remote setpoint source is configured as
LSP2, the value can be written.
0044 0069 Working Set Point 9 9 9 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.
0046 0071 Output 9 9 9 9 R/W Floating Point in Engineering Units.
0048 0073 PV
9 9 9 9
R Floating Point in Engineering Units.
004A 0075 Carbon Potential block
temperature 9 R Floating Point in Engineering Units
004C 0077 Gain #1 (Prop Band #1
if active) 9 9 R/W Floating Point . (in units per what was configured in
the HC900: Gain or Proportional Band)
004E 0079 Direction 9 9 9 R Floating Point
0.0=Direct; 1.0=Reverse
0050 0081 Reset #1 9 9 R/W Floating Point in Repeats/Minute or
Minutes/Repeat.
0052 0083 Rate #1 9 9 R/W Floating Point in Minutes
0054 0085 Cycle Time for Analog
Scan 9 9 9 9 R Floating Point in Seconds
0056 0087 PV Low Range 9 9 9 9 R Floating Point in Engineering Units.
0058 0089 PV High Range 9 9 9 9 R Floating Point in Engineering Units.
005A 0091 Alarm #1 SP #1 9 9 9 9 R/W Floating Point in Engineering Units.
005C 0093 Alarm #1 SP #2 9 9 9 9 R/W Floating Point in Engineering Units.
0060 0097 Gain #2 (Prop Band #2
if active) 9 9 R/W Floating Point