Function Blocks UM353-1B
April 2012
3-6
3.1.4 CLOCK - Real Time Clock
This function block enables the current time and date to
be viewed when using the local faceplate. As shipped,
the clock is set to Greenwich Mean Time. When the
Step Down Button is pressed to view the parameter
value, the current TIME or DATE at that instant is
displayed. The value can be changed using the pulser
and the <-- and --> arrow buttons to enter a new value.
The new value will initialize the clock when the STORE
button is pressed. To accommodate scheduled local time
changes such as Daylight Savings Time, which varies
from country to country, the clock is either manually
changed as described above or synchronized to a master
as described below.
The time and date cannot be changed locally if the
SRCE ADD parameter has been configured to a value
other than 0 to have the time synchronized with a master station on the Ethernet network. Using the IP MASK of
255.255.255.0, the first three octets of the IP address (e.g. 192.168.1.xxx) must be the same for all controllers. The
SRCE ADD parameter is used to set the last octet of the master controller on the network.
When the SRCE ADD parameter has been configured to synchronize the time with a master controller on the
Ethernet network, the controller will query the master controller at 12 midnight and synchronize its time with the
master. The time is also available in Modbus registers for display on the operator display (e.g. i|ware). The clock is
powered by the controller battery when shut down. Battery condition can be checked from the faceplate using the
BAT OK parameter in the STATN (Station) function block. In addition, the RTT function block has a battery status
output that can be used to trip an alarm, or force a loop to a desired state (e.g. manual, standby, hold).
3.1.5 ETHERNET - Ethernet Communication Network
Use this function block to configure Ethernet
communication parameters. The default IP addresses
shown are used for factory testing in a network
environment and should be changed to meet individual
system requirements. All 353 controllers that will be
communicating with each other or the HMI must reside on
the same subnet. Consult your company’s network
administrator for assistance in determining IP addresses.
Also, consider any network security issues that can arise
when networking plant areas.
ETHERNET
ETHERNET
ETHERNET
SD
L
IP AD
d
RES
s
(S)
..
1-nnn,2-nnn,3-nnn,4-nnn (192.168.0.2)
IP MASK
(S)
........
1-nnn,2-nnn,3-nnn,4-nnn (255.255.255.0)
E
R
P
M
A
IK
E
I
A
P
HD
XT
P
ETH
ernet
D
u
PL
e
X
(S)
.
A
uto,
HALF
,
FULL
(A)
S
GIE
A
PT
IP GATE
way
(S)
..
1-nnn,2-nnn,3-nnn,4-nnn (192.168.0.1)
TAEHR
ET
ETH
ernet
RATE (S)
.....
A
uto, 10, 100 (A)
TAPPR
E2
P
eer
2 P
eer
RATE (S)
.25, .5, 2, 5, 10 sec (.5)
(Rev 2)
REAL TIME CLOCK
E
SET DATE
......... 01011970 to 12313099 (0)
CLOCK
S
E
ET
E
M
T
SET TIME
.............. 00:00:00 to 23:59:59 (0)
S
TI
DTA
1 2 5 9 9
0 0
0 0
:
219
SRCE ADD
SouRCE ADDress
...................... 0 - 255 (0)
11
:
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