Siemens Simatic RTU303xC Series Operating Instructions Manual page 318

Program blocks
5.10 Switch and relay blocks
Tr
S
R
Q
Figure 5-12
Parameters
Parameters
Input parameters
En
Set
Reset
Trigger
318
Trigger
Set
Reset
Output
Switching diagram of a block "Current impulse relay", RS/SR priority = SR
Tag type / range of
values
True / False
Digital input / output /
bit memory
STATUS_ERROR
True / False
Digital input / output /
bit memory
STATUS_ERROR
True / False
Digital input / output /
bit memory
STATUS_ERROR
Description
Enable parameter, see section Often used parameters
(Page 252).
Sets the output to 1 on a positive edge (0 → 1).
With the setting "True", the output remains permanently
at 1. Resetting via the "Reset" input is then only possible
when "RS/SR priority" = RS.
With the setting "Unused" or "False", the output is only
controlled by the inputs "Reset" and "Trigger".
On a positive edge (0 → 1) resets the output to 0 when
"Set" = 0 or when the "RS/SR priority" = RS.
With the setting "True" "Set" is permanently reset and the
output remains permanently set to 0.
With the setting "unused" or "False", the "Set" input is not
reset.
With the setting "Unused" or "False", the output is only
controlled by the inputs "Reset" and "Trigger".
The edge change 0 → 1 of "Trigger" has the following
effect:
When "Set" and "Reset" = 0, the output is set to 1.
•
When "Set" and "Reset" = 1 and the "RS/SR priority"
•
= SR, the output is set to 1.
When "Set" and "Reset" = 1 and the "RS/SR priority"
•
= RS, the output is set to 0.
If only "Set" = 1, the output remains at 1.
•
If only "Reset" = 1, the output remains at 0.
•
The edge change 1 → 0 of "Trigger" has no effect:
Operating Instructions, 06/2019, C79000-G8976-C382-06
RTU303xC