I have written a basic functional Scheme for an Emergency Stop with (Manual) Reset and EDM in ctrlX Safety Engineering. I would like some confirmation that this is the correct/best way to write this functionality. Or is there a better way?
The scheme outputs a signal Estop_Status that would drive an external relay with a N/C forced guided contact connected to an EDM input.
Functional Scheme below.
Note: I have used a ctrlX PLC and functional I/O to simulate the external relay and adjust the EDM time to simulate faults.
Solved! Go to Solution.
First I would like to tell you some limitations if you are using the current release SAFEX-C.1x Firmware 22.214.171.124-FPGA211 and ctrlX SAFETY Engineering 126.96.36.19939:
Because of these limitations I would not recommend to use the logic you posted on the current release sorry 😅
Regarding the application itself, I have 2 things to say:
Thanks for the information on resetting estop using Start Type: Monitored
Yes I am using the EDM for monitoring according to cat 4 of EN 954 1. This is a very common use case. I am happy to reset all the PLC logic for now. After Estop or EDM error the system should go back to start conditions anyway.
Is there any plan to have an error reset block with a logical input? At the moment it looks like the only way error reset is the Start/Reset block which must be a physical input. Sometimes there needs to be multiple fault reset buttons or fault reset via higher level control via fieldbus.
Happy I could help.
Regarding the EDM improvments, if you see the block properties:
You will be able to separate certain blocks into different reset groups, that you can safely reset without having to restart the logic.
For this reset you will be able to use the Start/Reset Input Element as "Use as Block-Reset", but this is not implemented yet.
Regarding the reset fieldbus, there is the function block "Reset from Network":
However, this block still has very limited operation on the current release:
Given our current timetable my recommendation is to build your project witout expecting these fixes soon.
Hello @bclapperton ,
for EDM and Reset issues please follow the following Bug-IDs in our Extended Release Notes, that you will receive with every release: 501983, 584752, 642842 and 670720.
Since the question is answered for the moment, I close this with the relevant answers as "solution".
@BRamos : FYI
Your ctrlX SAFETY team