Honeywell HC900 - Table 108 Default PV Sources and Compare Type Operators

Function Blocks
STG Stage Function Block
368 HC900 Hybrid Control Designer Function Block Reference Guide Revision 11
2/07
Presets
The Stage type selection pre-assigns inputs and Hi/Lo setpoint comparisons as indicated in HTable 108.
These cannot be altered. The User-configurable type may be used to custom assign PV inputs and setpoint
comparison types.
Table 108 Default PV sources and compare type operators
Stage Type PV_ON = PV_OFF =
Compare Operator
between
PV ON and SP ON
Compare Operator
between
PV OFF and SP OFF
Pressure / Flow
PV1* PV2* PV ON > SP ON* PV OFF> SP OFF*
Pump Down
PV1* PV1* PV ON > SP ON* PV OFF< SP OFF*
Pump Up
PV1* PV1* PV ON < SP ON* PV OFF> SP OFF*
User Configurable
PV1 or PV2 PV1 or PV2
Select from:
PV ON > SP ON
PV ON
≥ SP ON
PV ON < SP ON
PV ON
≤ SP ON
PV ON = SP ON
Select from:
PV OFF > SP OFF
PV OFF
≥ SP OFF
PV OFF < SP OFF
PV OFF
≤ SP OFF
PV OFF = SP OFF
*Default – cannot be changed