The concept behind this system is to efficiently manage a rapid influx of message codes while avoiding repeated announcements of the same message in sequence. For example, if two events occur closely together, such as explosions, only one announcement will be made. However, if different events occur within a short timeframe, like an explosion followed by a flood, both will be announced in order of occurrence. The anticipated locust infestation is scheduled for later, and it will be a single event that still requires notification. Due to the use of a serial control device with an ETH I/P gateway, there may be a delay between sending a command and receiving a response. Therefore, the logic implemented must account for this delay. Before allowing the activation of a message playback function or manipulating the stack, the device must be checked for its busy status. Despite this, the stack should still be able to receive additional values as they come in. The process described could benefit from a Raspberry Pi or Arduino with CIP Ethernet capabilities. However, there may not be support for this protocol in that context, and there may not be time to learn a new technology at the moment. To interact with the HMS serial/IP Gateway, certain procedures must be followed, such as incrementing a trigger byte before sending or receiving data. The player itself is more straightforward and responds to single ASCII characters, but due to the serial nature of communication, the mentioned incrementation is necessary. While the device can play messages by manipulating bits and values within the PLC, there seems to be a challenge with queuing the messages for playback. Some assistance with example code for implementing a First-In-First-Out (FIFO) queue is sought to overcome this hurdle. In this system, certain defines are used to manage codes and statuses, such as [IncomingCode], [CheckForBusy], [EvaluationTag], and [BusyFlag]. The FIFO pair (STACK) operates efficiently for holding new codes while the player is occupied, but integrating it into the overall process is the current obstacle. The provided pseudocode outlines the flow of operations, including checking for incoming codes, monitoring the player's status, and handling the playback of messages. This flow ensures the proper handling and playback of messages based on the system's status and conditions.
Is there a limited amount of codes? Each code serves as an index in an array of TOFs. Access the TOF array using the IncomingingCode code, then proceed to execute TOF once the IncomingCode code is completed.
If necessary, additional comments can be included. I don't anticipate there being more than a dozen, but I'm unsure how your response addresses all of this. The comments I provided are merely extra inquiries about the flow. Are you referring to any specific aspect?
TheWaterboy inquired about the effectiveness of your response in making everything function smoothly. The code initializes the TOF timer structure at offsetIncomingCode within the tofarray (an ARRAY[0..24] of TIMER Structure type) only if the TOF timer is not currently running, and it continues running if it is already active. It may be helpful to utilize each or all of the tofarray[...]DN bits for functionalities like sounding a horn.
I need assistance with incorporating the elimination of duplicate stack entries and employing a FFL/FFU as a Surge Accumulator. Packaging lines typically utilize similar methods, such as shift registers for empty bottle detection. However, I am seeking a solution to track integers in a more precise and compact manner.
Using arrays instead of FFL/FFU/FIFO functions can make your programming much simpler and more efficient; dealing with those features can be quite troublesome. One approach is to utilize the mean scan cycle as a "clock" and cycle through 32 unique "codes" per scan cycle. For example, if your continuous scan cycle runs at 1kHz, setting a "timer preset" of 1000 in the MOV instruction on rung 0001 equates to approximately 31 seconds with a timer resolution of around 32 milliseconds. You may need to adjust and calibrate your own scan cycle and timer preset to achieve the desired time delay. To track incoming codes, it is recommended to clear the code to 0 at the start of each scan cycle since it's essentially a one-shot operation. However, in this scenario, the incoming code is not cleared until halfway through the cycle to monitor its behavior. The value assigned to the "incoming code" (N7:0) was initially set to 1, then changed to 2 after a certain period, and reverted back to 1. Notably, the countdown of the timer (N9:1) for the incoming code was not reset when the value returned to 1, as the timer had not yet reached zero. Although this method may appear intricate at first glance, it ultimately simplifies the process compared to using FFL/FFU/FIFO functions. By embracing this approach, you can streamline your programming logic and achieve desired functionalities more effectively.
This is an intriguing approach you've chosen, with each element thoughtfully considered. I agree that a Raspberry Pi or Arduino might be a nice addition, though the learning curve could be steep under time constraints. It's interesting how you're leveraging HMS serial/IP Gateway - the trigger byte incrementation sounds like an essential procedure to maintain clean data flow. As for your FIFO queue challenge, have you considered looking into pre-built libraries that could assist in implementing it? There are some robust queue libraries available that might help streamline your coding process.
This sounds like a fascinating project! It seems like the main challenge is efficiently managing the message queue while ensuring system responsiveness, especially with the added complexity of serial communication delays. One suggestion would be to implement a non-blocking approach for your checks, potentially using an interrupt-driven model to monitor the device’s busy status while still allowing the FIFO stack to receive new messages. That way, you won’t miss any incoming event codes, even if your player is busy. Also, have you considered using a state machine to clearly define the various states of your message handling process? It might help to visualize the flow and make the logic even more manageable. Good luck!
✅ Work Order Management
✅ Asset Tracking
✅ Preventive Maintenance
✅ Inspection Report
We have received your information. We will share Schedule Demo details on your Mail Id.
Answer: Answer: Efficiently managing a rapid influx of message codes in a sequential system helps avoid repeated announcements of the same message in close succession, ensuring clarity and effectiveness in communication.
Answer: Answer: Delays in communication, such as those caused by serial control devices like the ETH I/P gateway, can be accounted for by implementing logic that considers the delay between sending a command and receiving a response.
Answer: Answer: Devices like Raspberry Pi or Arduino with CIP Ethernet capabilities could benefit the system, but compatibility issues with protocols and time constraints for learning new technologies may need to be considered.
Answer: Answer: Implementing a FIFO queue helps ensure messages are played back in the correct order, addressing challenges with managing and prioritizing messages for playback efficiently.
Answer: Answer: Defines are used to manage codes and statuses within the system, with specific definitions
Join hundreds of satisfied customers who have transformed their maintenance processes.
Sign up today and start optimizing your workflow.