Describe what you understand by the following and give a description in your own words why you might use them and what may be different about them to usual coding:
(a) Reusable blocks
(b) Drive logic
(c) Alarm handling
In at least 3 points explain the issues related to using PLCs for closed loop (PID) control.
Explain the issues related to using PLCs for: Batch processes
1. The number of program could be large
(a) Sequential control.
1. Occurrence of given sequences of discrete outputs
When doing a PLC project, there are 5 steps that are typically followed. Please list and describe these steps, in your own words. 1 mark for the Step item and 1 mark for a good description of the step