INTRODUCTION
FEATURES
1 - 2
I-E96-322A
®
The MFP module uses the data from the FCS module to calcu-
late turbine speed. The configuration within the MFP module
uses the calculated speed to drive the servo valve outputs
according to the control strategy.
FEATURES
Enhancements to the IMHSS03 module improve its perfor-
mance over its predecessor, the IMHSS01 and IMHSS02 mod-
ules. Performance improvements include:
•
High resolution analog-to-digital and digital-to-analog con-
verters, more accurate LVDT signal condition, an I/H con-
verter interface, and improved digital and analog input/
output isolation.
Figure 1-1. HSS Module within the INFI 90 Hierarchy
CONTROL
FIELD I/O
I/O
POSITION DEMAND
TP50202B
INFI-NET
NIS NPM
CONTROLWAY
MFP
I/O EXPANDER BUS
FCS
HSS
OIS
FREQUENCY COUNTER MODULE
HYDRAULIC SERVO MODULE
MULTI-FUNCTION PROCESSOR
NETWORK INTERFACE MODULE
NETWORK PROCESSOR MODULE
OPERATOR INTERFACE STATION
FCS
HSS
MFP
NIS
NPM
OIS
TURBINE
SPEED