User manual

IEC61131 User and Reference Manual
April 22, 2008
150
ainbatt
RAM battery voltage
Description
The ainbatt I/O module provides a single I/O channel for the RAM backup battery voltage of
the SCADAPack controller. This module provides an I/O channel for the Input voltage of the
SCADASense series of programmable controllers (4202 DR, 4202 DS, 4203 DR and
4203DS). Data for the I/O channel may be connected to a user-defined variable with the I/O
connection editor. The connected variable is updated continuously with data read from the
controller.
The lithium battery input measures the voltage of the battery that maintains the non-volatile
RAM in a SCADAPack controller. The reading returned from this input is in the range from 0
– 5000 representing the battery in mV. It is useful in determining if the battery needs
replacement. The 3.6V lithium battery will return a typical value of 3600 or 3700. The RAM
battery voltage resolution is 100 millivolts. A reading less than 3000 (3.0V) indicates that the
lithium battery requires replacement.
I/O Connection
Module address
No physical module address is required.
Library type
IO board
Data type
Integer / real
Channel type
Input
Number of channels
1
Notes
The SCADAPack 100 controller uses the complex equipment sp100 module to access the
RAM backup battery voltage. See the sp100 IO connection for details.
Refer to the SCADAPack System Manual for further information on controller board RAM
backup battery.