Siemens 353 User Manual

Function Blocks UM353-1B
April 2012
3-84
3.2.79 RTT_ - Real Time clock Trip
RTT_ function blocks provide high (1) outputs when time
from the CLOCK block coincides with the TIME, DATE, &
DAYS of the Week TRIP settings. The block outputs will
remain high while the CLOCK coincides with the settings.
Output TM will go high when the TIME coincides with the
TIME TRP setting. It will remain high for 1 second.
Output DT will go high when the MONTH, DAY, & YEAR
coincides with the MNTH TRP, DAY TRP, & YEAR TRP. It
will remain high for one day.
Output DY will go high when the Day of the Week, calculated
by the 353, corresponds to the MONTH, DAY, & YEAR.
The Clock Status output will go high if there is a problem with
the clock or the clock has been reset. The Battery Status will
go high if the battery is low. The battery low condition could
also cause a clock reset when the power is cycled. These
outputs can be used to trip a User Status alarm condition or in logic to force a loop to manual, standby, hold, etc.
Status outputs could be intermittent and may require configuration of function block logic to latch the status and
operator interaction using pushbutton switches to clear.
REAL TIME TRIP
RTT_
E
TIME TR
i
P
(S) ...... 00:00:00 - 23:59:59 (0)
MNTH TR
i
P
(S)
........................... 01 - 12 (01)
MN
IM
S
H
D
A
Y
TM
T
i
M
e Trip
DT
DY
D
a
T
e Trip
D
a
Ys
Trip
1 7
3
6:
TIME
MT WT F S
DAYS
T
T
0111110
DAYS TR
i
P
(S)
..................... SMTWTFS (1111111)
TRP
TRP
T
R
P
MNTH
1 2
DAY
3 0
YEAR
9 991
DaTe Trip
TiMe Trip
DaYs Trip
S
DAY TR
i
P
(S)
.............................. 01 - 31 (01)
DYATRP
YEAR TR
i
P
(S)
.................... 1970 -3099 (1999)
YE RATRP
:16
Rev. 3
CS
C
lock
S
tatus
BS
B
attery
S
tatus

Siemens 353 Specifications

General

Brand	Siemens
Model	353
Category	Controller
Language	English