Rlm_ - Rate Limiter (V3.0) - Siemens Moore 353 User Manual

Function Blocks

3.2.84 RLM_ - Rate Limiter (V3.0)

RLM_ function blocks limit the rate of change of
analog input A. Separate up and down rates are
entered in configuration, in engineering units per
minute. Output RL will be high (1) if the block is
limiting a rising input signal and output FL will be high
when the block is limiting a falling input signal.
The Adaptive Rate inputs will vary the configured
adaptive rate between 0 – 100% as the input varies
from 0 to 100%. When the input is not configured the
adaptive rate will not apply.
Input E asserted high (1) will enable the limit action of
the block. When input E is low (0), the output will
track the analog input. If input E is not configured, the
limit action of the block will be enabled
A
E
.
AU
AD
3-92
A nalog Input
UPRATE
DOWNRATE
Switch shown in the enabled position with Input E not connected
E nable
Adaptive Rate Up
Adaptive Rate Down
BLOCK DIAGRAM
RATE LIMITER
ESN = 000
RLM_
A
Analog Input
RATE LIMITER
E
Enable
AU
Adaptive Up
AD
Adaptive Dn
U P R A T E
UP RATE (units/minute)
D O W N R A T E
DOWN RATE (units/minute)
I N P U T A
INPUT A .....
(H)
I N P U T E
INPUT E .....
(H)
I N P U T
A U
INPUT AU
(H)
I N P U T A D
INPUT AD
(H)
E S N
Exec. Seq. No.
O utput 1
R ising L imit
F alling L imit
Rev. 2
UM353-1
Output 1
O1
RL Rising Limit
FL Falling Limit
....... Real (100.0)
(S)
. Real (100.0)
(S)
loop tag.block tag.output (null)
loop tag.block tag.output (null)
..
loop tag.block tag.output (null)
..
loop tag.block tag.output (null)
............ 001 to 250
(H)
O1
RL
FL
.
March 2003