Register Map for Process and Operation Type Variables
Segment Register Map
62 HC900 Hybrid Controller Communications User Guide Revision 4
9/03
Example For Determining a Segment Register
To change the ramp value in segment #8 of setpoint programmer #2, the register address is determined as
follows.
Step 1: Use Table 6-1 to determine the start address for setpoint program #2 profile. The value is 2A00
Hex.
Step 2: Calculate the offset address for segment 8 in a profile. This is calculated as:
Segment #8 offset address = (segment number – 1) * 8
= (8-1) * 8
= 56 or 38 Hex
Step 3: Use the table above to determine the register offset for the ramp value. The value is 4.
Step 4: Calculate the address by adding the results of steps 1, 2, and 3 to determine the register address.
Register address = Setpoint program #2 profile base address
+ Segment 8 offset address
+ Ramp value register offset
= 2A00 + 38 + 4
= 2A3C