Function Blocks
ROC Rate of Change Function Block
Revision 11 HC900 Hybrid Control Designer Function Block Reference Guide 323
2/07
Block properties
Double click on the function block to access the function block properties dialog box.
Configuration parameters
Table 95 ROC configuration parameters
Properties Group Parameter Index # Parameter Description Value or Selection
Filter Time Constant
0 Filter Time Constant 0.0 to 3.0 minutes
Setpoint Limits High Rate
1 High Rate of Change setpoint 0 (off) to 99999.9 eu/min
Low Rate
2 Low Rate of Change setpoint 0 (off) to 99999.9 eu/min
Direction Rate High
3 High Rate Direction
• Both
• Increasing only
• Decreasing only
Click on radio button to
select
Direction Rate Low
4 Low Rate Direction
• Both
• Increasing only
• Decreasing only
Click on radio button to
select
Hysteresis
5 Hysteresis 0-999