Siemens 353, Руководство пользователя

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UM353-1B Function Blocks
April 2012 3-27
output requirement is less than the maximum pulse rate of 5/sec available with a 0.1 sec cycle time. The
requirement would also be satisfied if a PUL SCAL of 1 was selected which would have required a maximum pulse
rate of 1/sec.
POWER UP - During a warm start, if the configuration parameter PU LAST was set to YES, the integrator function
will initialize with the last value prior to power down and all outputs will be initialized to the last value prior to
power down. If set to NO, or during a cold start, the integrator and all outputs will initialize to 0.
Input EC allows the batch totalizer block to be used with another function block, such as the DINU that provides a
count signal. When input A is not configured it will be set to (0.0). The EC input is summed with the initial value
for use as the total. This value will now be displayed as the total on the operator faceplate and the presets will act
on this value to provide outputs A1 and A2.
BLOCK DIAGRAM
+/
-
1
BATCH TOTALIZER
A(t)
dt
A
PRESET 1
Display (
.T
)
PRESET 2
TOT alizer _UNIT s
INIT ital VAL ue
S
TL
A1
A2
DIR ect ACT ing ?
R
R eset
S top
.00001 - 99999
PUL se SCAL ing
PL
..
3 2 1
..
7
0 0
..
8 0 0
T1
T2
T1
T2
T
rip
1
- External Setting
A larm 2
A larm 1
T rip 2
T rip 1
ZDO
T rip 2 - External Setting
A nalog Input
Z ero D rop O ut
T ota L
P u L se
Max. Pulse Rate =
A (maximum)
[Time Base (sec) ][PUL SCAL]
Max. Pulse Rate =
0.5
Cycle Time
Required:
Available:
EC
External Count Input
+
+
+
Integrator
.
.
Rev 2