Configuration Of System Limits; System Limits Implementation; Legacy Peak-Peak Algorithm - GE Mark VIeS System Manual

GAPn _
VIBn
GAPn _
A
POSy
GAPn _ KPH
#
VIBn
LMVibnA
From the ToolboxST application, Component Editor, I/O pack, Parameters tab, there is a global System Limit disable
parameter, SystemLimits. When this parameter is set to Disable, all system limits in the YVIB are set to False, and a
diagnostic alarm is generated.
Item Description
SysLimit# Set point for the System Limit check. Value is expressed in EU for that point.
SysLim#Enabl Enable or Disable this specific System Limit check. Value is an enumerated type.
SysLim#Latch Configure whether system limits should latch TRUE. Value is an enumerated type.
SysLim#Type Configure whether system limits checks are greater than set point or less than set point. Value is an
enumerated type.

8.3.2.3 Legacy Peak-Peak Algorithm

The default vibration algorithm, which is the only vibration algorithm implemented by the YVIBS1A, is a windowed peak
detection function. A window size (scan period) is determined by the current rotor speed on GAP13_KPH1. If there is no
keyphasor input, 160 ms scan period is the default. As new input data is processed, it fills the window in. When the window is
full, we calculate the peak-peak measurement, scale it, and send it to signal space. The window is then emptied and needs to
be completely filled again before a new peak-peak value is computed. For this reason, the effective update rate is the scan
period, not frame rate.
Scan
Period (s)
Frame
Period
238 GEH-6855_Vol_II
SysLim # Type
Comparison SysLim # Latch
(A >= B or
A <= B )
B
SysLimit #

System Limits Implementation

Configuration of System Limits

Signal Space Value
NotLatch
Latch
Set
Set Dominant
Latch
Rst
RSTSYS
GEH-6855_Vol_II Mark VIeS Functional Safety Systems Volume II
Public Information
SysLim # GAPn
SysLim# VIBn
Out
SysLim#ACCn
Choices
Textfield
Enable or Disable
Latch or NotLatch
<= or >=