GE D25 - DC Analog Input Test

GE Grid Solutions
D25
User's Manual
GE Information 994-0081-3.00-21
89
Testing Hardware I/O Points, Continued
DC Analog
Input Test
Testing DC Analog Inputs: the first part of this test verifies that the internal
Analog References are operating within the nominal range.
Analog Input changes are displayed in WESMAINT.
Procedure:
Verify Analog
Input
To conduct this test the code and configuration file must be downloaded to
the D25’s FLASH memory.
First, check the Analog Reference values. From the WESMAINT Main
Menu:
Step Action
1 On the Main Menu, type 1 — System Data Display.
Results: The System Data Menu appears.
2 On the System Data Menu, use the up and down arrow keys, or
type the menu number 3, to select Analog Input Display, then
press ENTER.
Results: The point numbers and (optionally) point descriptions
appear on the WESMAINT II+ display.
3 Use the arrow keys to move up or down to highlight a D25 Plant
I/O Analog Reference point.
4 Verify that the points display a value close to the values shown in
this table:
Table: Analog
Reference
Values
Use this table to verify the DC analog reference values.
Description Nominal Value
Positive DC Analog Reference 4095 (± 230)
Negative DC Analog Reference -4095 (± 230)
Zero DC Analog Reference 0 (± 164)
Notes
• These reference values are monitored by D25 software.
• When the D25 software detects an invalid DC analog reference, it sets the value
of the field DC analog points to zero and sets the over-range attribute on those
points.