Installation manual

Publication 1747-RM001G-EN-P - November 2008
B-54 SLC Status File
S:39 Dynamic Config Clock/Calendar Day
This value contains the day value of the clock/calendar.
Valid range is 1 to 31. To disable the clock/calendar, write
zeros to all clock or calendar words (S:37 to S:42). The first
day of the month equals the value of 1. See status word
S:53 for Day-of-Week.
•••
S:40 Dynamic Config Clock/Calendar Hours
This value contains the hour value of the clock/calendar.
Valid range is 0 to 23. To disable the clock/calendar, write
zeros to all clock or calendar words (S:37 to S:42). 0000
hundred hours equals the value of 0.
•••
S:41 Dynamic Config Clock/Calendar Minutes
This value contains the minute value of the clock/calendar.
Valid range is 0 to 59. To disable the clock/calendar, write
zeros to all clock or calendar words (S:37 to S:42).
•••
S:42 Dynamic Config Clock/Calendar Seconds
This value contains the seconds value of the clock/calendar.
Valid range is 0 to 59. To disable the clock/calendar, write
zeros to all clock or calendar words (S:37 to S:42).
•••
ATTENTION
The second value may not reliably increment every second,
and therefore should not be relied upon for seconds-based
control or selection. Use the STI function for reliable
time-based control or calculations.
S:43
S:44
S:45
Status Selectable Timed Interrupt - 10 µs Timer
I/O Event Interrupt - 10 µs Timer
Discrete Input Interrupt - 10 µs Timer
This 16-bit value is “free running” and is used to measure
the amount of time that expires between consecutive
interrupt subroutine executions (in increments of 10 µs).
This value is updated upon each entry into the interrupt
subroutine. The 10 µs timer dictates that the maximum
amount of time that can expire between any two interrupts
and still result in a valid time measurement is 0.32767
seconds.
(16-bit signed x 10 µs = 32767 x .00001 = 0.32767 seconds)
The 10 µs timer is common to the STI interrupt, the Event I/O
interrupt, and the DII interrupt.
•••
Table B.4 Status File Functions (Continued)
Address Classification Description Fixed
5/01
5/02 5/03 5/04 5/05