Previously, we discussed when data retention functionality is needed in project development. Today, I'd like to share the specific application of one such solution (1s UPS power loss retention).
When using Beckhoff controllers to develop complex projects, we often need to run multiple independent software PLCs within the same industrial PC , for example:
In PLC project one, it is necessary to save the mechanical coordinate position, angle, etc. of the robotic arm before it stops and is powered off ...
In PLC Project 2, the actual processing data needs to be recorded: This includes saving the current batch number of bottles being filled, and whether the pre-filled bottles have been packaged and sealed …
In PLC Project 3, the production formula data set in the current human-machine interface needs to be recorded so that it can be used again after the machine is turned on next time.
All three projects require data retention during power loss. How can we ensure that the power loss retention data in each PLC project is saved before shutdown?
The manual and example programs in "TwinCAT 3: Using 1s UPS Power Loss Retention Function in Multiple PLC Projects" written by Cai Jinzhong and edited by Xu Yingying detail how to achieve power loss retention function by linking variables to realize the status interaction of power loss data in different PLC projects.
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