Rockwell Automation 1503VC IntelliVAC Plus Contactor Control Module - Manual (Page 41)

4-14 Description of Features
1503-UM054C-EN-P – June 2013
The ‘IBx Line Undervoltage’ and ‘IBx Line Undervoltage’ values
are included to allow a distinction for Undervoltage conditions
during different intervals of the contactor coil operation.
Real-Time Clock (RTC)
The IntelliVAC Plus Unit contains an RTC with an external 3V
lithium battery (see Appendix D for battery replacement type) which
will maintain the correct time for a period of at least 20 years when
no external power is provided. The RTC will be set-up at the
factory, and provision shall be made to adjust the setting via the
DeviceNet interface (Time Zone Selection in Chapter 4).
The RTC will be used to support several features associated with the
IntelliVAC Plus as well as to provide the date and time information
over the DeviceNet interface. Time stamping of events will be
stored in the Event Log which resides in non-volatile memory. The
RTC is capable of a resolution as low as 10mS which will allow
more precise stamping of the events for better knowledge of when
events occurred, thus helping to define which event occurred first.
The time format that should be used is the 24 hour mode.
The RTC data will be settable on DeviceNet in the following
manner:
Valid Data Range
‘Year = ‘ ‘2000’ to ‘2099’
‘Month = ‘ ‘01’ to ‘12’
‘Date = ‘ ‘01’ to ‘31’
‘Hour = ‘ ‘01’ to ‘24’ (uses 24 hour time)
‘Minute = ‘ ‘00’ to ‘59’
‘Second = ‘ ‘00’ to ‘59’
’10milliSecond=‘‘00’to‘99’
The RTC data will be viewable on DeviceNet in the following
manner:
RTC Date: Month/Day/Year
RTC Time: Hour/Minute/Second/Millisecond
The ’10 millisecond’ parameter will only be used to time stamp
events and will not be viewable in the RTC data viewing mode.
Various operating transactions will be time stamped using the RTC
values in the following format: Year, Month, Date, Hour, Minute,
Second and 0.01 Second.