Program blocks
5.7 Blocks for analog value functions
RTU303xC
Operating Instructions, 06/2019, C79000-G8976-C382-06
281
Parameters
Tag type / range of
values
Description
Trigger
True / False
Digital input / output /
bit memory
STATUS_ERROR
With an edge change 0
→
1 block processing is started (if
En = 1) and the current value of the analog input (A
Trg
) is
saved.
With the setting "True" the trigger is always active.
With the setting "False" the block is never processed.
Input
Analog input / bit
memory
Event counter / usage
meter
The value (A
Trg
) of the input at the time of the edge
change of "Trigger" is monitored by the block function for
positive and negative change.
Function parameters
Positive change
3.402823 e-38 ..
3.402823 e+38
Max. 19 characters,
display of max. 4
decimal places
Absolute value of the positive change
(Δ+)
Negative change 3.402823 e-38 ..
3.402823 e+38
Max. 19 characters,
display of max. 4
decimal places
Absolute value of the negative change (Δ
-)
Output parameters
Output
Digital output / bit
memory
Tag in which the value calculated by the block is output:
•
1 = "Positive change" overshot or "Negative change "
undershot
•
0 = "Positive change" not overshot and "Negative
change " not undershot
5.7.3
Limit value switch
Function
An analog input is monitored for two values and a digital output signal is set that depends on
the function of the block.
