Honeywell HC900 - System Monitor Function Blocks

Function Blocks
ALM Alarm Function Block
52 HC900 Hybrid Control Designer Function Block Reference Guide Revision 11
2/07
periodic changes. (RSP enabled). The Output contains a tag identification that will be used to identify the
alarm state.
Example 2 shows an ALM function block being used to alarm on PV>SP.
EXAMPLE 1
Alarm
Alarm State
CV + RSP Value
CV - RSP Value
CV
Alarm State
EXAMPLE 2
Alarm State
Hysteresis
Out of Alarm
RSP Value
Accessed using Variable Edit Screen
PV
Figure 10 ALM function block example