OPERATING PROCEDURES
START-UP AND NORMAL OPERATION
5 - 2
I-E96-322A
®
START-UP AND NORMAL OPERATION
Only qualified personnel should perform plant start-up and
operation. To start up and operate the HSS module:
1. Start the turbine following the plant start-up procedure.
2. Enter a turbine speed demand or load demand set point via
the operator interface.
3. Operation continues according to the system control strat-
egy in the MFP configuration.
HARD MANUAL MODE OPERATION
Operation enters the hard manual mode when the module
starts up, an MFP communication failure occurs, or when it is
initiated from function code 55. Table
lists the faceplate
LED status when the module enters the hard manual mode.
Figure
shows the module faceplate LEDs. To manually
position the throttle valve:
1. Monitor the turbine speed or load through the operator
interface.
2. Refer to your plant operating procedure to determine the
actuator position needed to maintain turbine speed.
3. To maintain the load (or speed) demand, adjust the
hydraulic actuator position by activating the raise or lower
contacts (customer installed). The raise contact opens the valve
Table 5-1. LED States
Red/Green
Status LED
LED 1
ATOP/CAL
LED 4
OUT DIS
LED 8
HARD MAN
Condition
Red
On
On
On
Initial power up. All LEDs are on momentarily.
Off
Off
On
Off
On-board diagnostics during power up.
Off
Off
On
HSS module waiting for MFP initialization data.
Green
Off
Off
Off
Normal operation.
On
Off
Off
Automatic tuning of parameters or calibration in
progress.
Off
Off
On
Hard manual mode. The MFP position demand
is not equal to the HSS position demand or man-
ual mode is enabled through function code 55.
Off
On
Off
Servo output disabled (D/A error, all bad LVDT
transformers in servo valve mode).
Blinking
green
Off
Off
On
MFP module is in configuration mode or failed.
HSS module is operating.
Red
Off
On
Off
HSS module failure.