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Author Topic: BRX TCP  (Read 13052 times)

mhw

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BRX TCP
« on: February 19, 2021, 12:56:07 PM »
I have a BRX that is doing MRX and MWXs to 4 TCP clients (Click PLCs). One of the clients went off line for an extended period. After bringing it back online the BRX would not communicate with it until I put the BRX in program mode and then run. I have tried to duplicate this by disconnecting the PLC for a short time. The communications are quickly reestablished.
Is this by design that the communications are disabled until a program mode cycle after being offline for an extended period?
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Bolt

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Re: BRX TCP
« Reply #1 on: February 19, 2021, 01:42:01 PM »
I doubt it is by "design".  I also MRX/MWX to multiple Clicks, and haven't had a BRX related issue re-connecting after an outage.

Are these connected via hardwired ethernet or via a wireless bridge of sorts?

How is your program written, do you have your MRX instructions set to run continuously at a time interval?  Do you Set Bit or JMP to Stage on Success/Error?  Do you have timeouts for non-responsive Clicks?
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BobO

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Re: BRX TCP
« Reply #2 on: February 19, 2021, 02:06:56 PM »
Quote from: mhw on February 19, 2021, 12:56:07 PM
I have a BRX that is doing MRX and MWXs to 4 TCP clients (Click PLCs). One of the clients went off line for an extended period. After bringing it back online the BRX would not communicate with it until I put the BRX in program mode and then run. I have tried to duplicate this by disconnecting the PLC for a short time. The communications are quickly reestablished.
Is this by design that the communications are disabled until a program mode cycle after being offline for an extended period?

Definitely not by design. All comms should come right back. If you can dupe it, I'd love to know the details.

Sometimes the issue is network hardware. I've seen switches and adapters get mad until they were power cycled. Sometimes unhooking the network cable refreshes the switch or adapter.
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mhw

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Re: BRX TCP
« Reply #3 on: February 20, 2021, 08:11:01 AM »
Quote
How is your program written, do you have your MRX instructions set to run continuously at a time interval?  Do you Set Bit or JMP to Stage on Success/Error?  Do you have timeouts for non-responsive Clicks?
Each instruction is in a separate stage and I jump to the next after a success or error.
Quote
Are these connected via hardwired ethernet or via a wireless bridge of sorts?
Hardwired
Quote
Sometimes the issue is network hardware. I've seen switches and adapters get mad until they were power cycled. Sometimes unhooking the network cable refreshes the switch or adapter.
I was able to connect to the click with my PC through the same series of switches that DoMore is connected. The switches are unmanaged stride. I never did power cycle the switches.
I have numerous sites where DoMore is communicating to several clicks without any problems. Hopefully I will never see this again.
Thanks
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mhw

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Re: BRX TCP
« Reply #4 on: August 03, 2021, 05:39:15 PM »
It is doing it again and I can't get it to restart! They had 2 of the PLCs offline today and now it is hung.
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BobO

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Re: BRX TCP
« Reply #5 on: August 03, 2021, 05:43:35 PM »
Quote from: mhw on August 03, 2021, 05:39:15 PM
It is doing it again and I can't get it to restart! They had 2 of the PLCs offline today and now it is hung.

It is hung on a particular stage or MWX/MRX box?
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mhw

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Re: BRX TCP
« Reply #6 on: August 03, 2021, 06:07:38 PM »
Stage with a MRX.
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BobO

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Re: BRX TCP
« Reply #7 on: August 03, 2021, 06:14:38 PM »
Quote from: mhw on August 03, 2021, 06:07:38 PM
Stage with a MRX.

Stage bit on, but neither Success or Error bit on or transitioned?

Open the Device list and double click on the Modbus/TCP client you are using. What does the device status say?
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"It has recently come to our attention that users spend 95% of their time using 5% of the available features. That might be relevant." -BobO

mhw

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Re: BRX TCP
« Reply #8 on: August 04, 2021, 08:18:28 AM »
Quote
Stage bit on, but neither Success or Error bit on or transitioned?
correct

Quote
Open the Device list and double click on the Modbus/TCP client you are using. What does the device status say?
Unfortunately I didn't read this post before I updated the firmware.  It was on 2.7 and I updated it to 2.8.3. Started working right after the update. I have the status open now and every device will momentarily flash that the instruction is locked. I assume that this is normal.

Thanks for you help.
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BobO

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Re: BRX TCP
« Reply #9 on: August 04, 2021, 09:18:44 AM »
Quote from: mhw on August 04, 2021, 08:18:28 AM
I have the status open now and every device will momentarily flash that the instruction is locked. I assume that this is normal.

Yes.
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