Current Impulse Relay - Siemens Simatic RTU303xC Series Operating Instructions Manual

Parameters
Function parameters
RS/SR priority
Output parameters
Output
5.10.2

Current impulse relay

Function
The input parameters "Set" and "Reset" set the output to 1 or 0:
● Set
A positive edge (0 → 1) sets the output to 1.
● Reset
A positive edge (0 → 1) sets the output to 0.
As with the latching relay (see above) the parameters "Set" and "Reset" both have a latching
function.
If "Set" and "Reset" are both = 0, the output is set to 1.
If "Set" and "Reset" are both = 1, switching the output is controlled by the "RS/SR priority"
function parameter:
● SR: The output is set to 1.
● RS: The output is set to 0.
The "Trigger" input causes a status change at the output regardless of its previous status.
● Output = 0: A positive edge at the "Trigger" input sets the output to 1.
● Output = 1: A positive edge at the "Trigger" input sets the output to 0.
The "Trigger" input has the function of a button. A tag can be connected to its input that
generates short pulses (current impulses).
Diagram
The following diagram shows an example of the effect on the output.
The blue arrow indicates a value change of the output Q that is caused by the programming
of the RS/SR priority.
RTU303xC
Operating Instructions, 06/2019, C79000-G8976-C382-06
Tag type / range of Description
values
SR
• •
RS
•
•
Digital output / bit Tag for the output.
memory
5.10 Switch and relay blocks
SR
If "Set" and "Reset" have the same value, "SR" caus-
es the output to be set to 1.
RS
If "Set" and "Reset" have the same value, "RS" caus-
es the output to be set to 0.
Program blocks
317