Failed to disconnect multiplexer, failed Pumps Comms error

[ErosKuikel]

Hello, I have been getting this error in my ChiBio setup and was looking for potential solutions. We think that just the pump comms are faulty since the error log does NOT include “Failed Multiplexer Comms”. Any suggestions on how to rectify the error is appreciated..
Here is the error log:

[2021-06-14 17:07:11 +0000] [1801] [INFO] Starting gunicorn 20.1.0
[2021-06-14 17:07:11 +0000] [1801] [INFO] Listening at: http://192.168.7.2:5000 (1801)
[2021-06-14 17:07:11 +0000] [1801] [INFO] Using worker: sync
[2021-06-14 17:07:11 +0000] [1805] [INFO] Booting worker with pid: 1805
2021-06-14 17:07:19.766367 Starting watchdog
2021-06-14 17:07:22.249172 Initialising devices
2021-06-14 17:07:22.460563 Initialised M0, Device ID: 6159179671295245632
2021-06-14 17:07:23.072161 Initialised M1, Device ID: 194695882679957548
2021-06-14 17:07:23.597039 Start Up Complete
2021-06-14 17:07:54.286655 Set item: Pump1 to value 0.5 on M1
2021-06-14 17:08:00.077176 Set item: Pump2 to value 0.5 on M1
2021-06-14 17:10:41.830488Calibrated OD
2021-06-14 17:10:54.983099Calibrated OD
2021-06-14 17:11:05.726571Calibrated OD
2021-06-14 17:11:18.549027 Initialised M1, Device ID: 194695882679957548
2021-06-14 17:11:29.134315Calibrated OD
2021-06-14 18:05:23.291922 Set item: Pump1 to value 0.5 on M1
2021-06-14 18:05:24.531325 Set item: Pump2 to value 0.5 on M1
2021-06-14 18:17:39.992736 Set item: Pump1 to value 0.02 on M1
2021-06-14 18:23:16.746624 Set item: OD to value 0.6 on M1
2021-06-14 18:23:21.565236 Set item: OD to value 0.5 on M1
2021-06-15 16:19:51.008335Failed to disconnect multiplexer on device M1
2021-06-15 19:35:01.316448 Failed Pumps comms 1 times on device M1
2021-06-15 19:35:01.424338 Failed Pumps comms 2 times on device M1
2021-06-16 02:39:24.056322Failed to disconnect multiplexer on device M1
2021-06-16 02:55:24.936334Failed to disconnect multiplexer on device M1
2021-06-16 20:05:05.000824 Set item: Pump1 to value 0.5 on M0
2021-06-16 20:05:08.786019 Set item: Pump2 to value 0.5 on M0
2021-06-16 20:13:32.486125Calibrated OD
2021-06-16 22:01:02.944336 Failed Pumps comms 1 times on device M1
2021-06-16 22:01:03.052339 Failed Pumps comms 2 times on device M1
2021-06-17 03:26:23.418006 Set item: Pump1 to value 0.5 on M1
2021-06-17 03:26:24.585646 Set item: Pump2 to value 0.5 on M1
2021-06-18 12:07:08.915443 Set item: Pump2 to value 0.3 on M1
2021-06-18 12:07:11.859212 Set item: Pump1 to value 0.3 on M1
2021-06-18 12:13:22.285872Calibrated OD
2021-06-18 12:13:36.510426Calibrated OD
2021-06-18 12:14:13.967781 Set item: Pump1 to value 0.02 on M1
2021-06-18 12:15:24.096708 Set item: Pump2 to value 0.02 on M1
2021-06-18 12:15:54.743896 Initialised M1, Device ID: 194695882679957548
2021-06-18 12:16:08.438394Calibrated OD
2021-06-18 12:16:25.670564 Set item: Pump1 to value 0.02 on M1
2021-06-18 12:16:26.470370 Set item: Pump2 to value 0.02 on M1
2021-06-18 12:37:15.428608 Initialised M1, Device ID: 194695882679957548
2021-06-18 12:37:54.839842Calibrated OD
2021-06-18 12:38:04.287365Calibrated OD
2021-06-18 12:38:17.711333Calibrated OD
2021-06-19 02:29:43.684485 Failed Pumps comms 1 times on device M1
2021-06-19 02:29:43.792327 Failed Pumps comms 2 times on device M1
2021-06-19 12:12:38.568334 Failed Pumps comms 1 times on device M1
2021-06-19 12:12:38.676339 Failed Pumps comms 2 times on device M1
2021-06-19 19:34:01.732348 Failed Pumps comms 1 times on device M1
2021-06-19 19:34:01.840336 Failed Pumps comms 2 times on device M1
2021-06-20 13:05:56.644369 Failed Pumps comms 1 times on device M1
2021-06-20 13:05:56.752343 Failed Pumps comms 2 times on device M1
2021-06-20 13:54:47.528311 Failed PWM comms 1 times on device M1
2021-06-20 13:54:47.636394 Failed PWM comms 2 times on device M1
2021-06-20 17:46:05.483245 Set item: Pump2 to value 0.02 on M1
2021-06-20 17:46:33.882786 Set item: Pump2 to value 0.02 on M1
2021-06-20 17:48:39.960959 Set item: Pump2 to value 0.02 on M0
2021-06-20 17:49:00.635640 Set item: Pump1 to value 0.02 on M1
2021-06-20 17:49:02.427505 Set item: Pump2 to value 0.02 on M1
2021-06-20 17:49:09.963640 Set item: Pump1 to value 0.02 on M1
2021-06-20 17:49:12.627693 Set item: Pump1 to value 0.02 on M1
2021-06-20 17:50:17.677717 Failed Pumps comms 1 times on device M1
2021-06-20 17:50:17.699992 Failed Pumps comms 2 times on device M1
2021-06-20 17:50:17.722181 Failed Pumps comms 3 times on device M1
2021-06-20 17:50:17.744188 Failed Pumps comms 4 times on device M1
2021-06-20 17:50:17.766183 Failed Pumps comms 5 times on device M1
2021-06-20 17:50:17.788180 Failed Pumps comms 6 times on device M1
2021-06-20 17:50:17.810235 Failed Pumps comms 7 times on device M1
2021-06-20 17:50:17.832232 Failed Pumps comms 8 times on device M1
2021-06-20 17:50:17.854192 Failed Pumps comms 9 times on device M1
2021-06-20 17:50:17.876164 Failed Pumps comms 10 times on device M1
2021-06-20 17:50:17.898098 Failed Pumps comms 11 times on device M1
2021-06-20 17:50:17.919554Failed to communicate to a device 10 times. Disabling hardware and software!
[2021-06-20 17:50:17 +0000] [1801] [INFO] Shutting down: Master
[2021-06-20 17:50:17 +0000] [1801] [INFO] Reason: App failed to load.
debian@beaglebone:~$ client_loop: send disconnect: Broken pipe
–removed personalinfo–
Debian GNU/Linux 10

[harrison]

That does look like a potentially faulty pump board, or fault in the communication lines somewhere between the reactor and pump.
Is it a new system you have recently started working with? If so it might be a manufacturing defect there.
If it is an old system that worked well previously, I’d recommend swabbing/cleaning the pump circuit and USB connectors with ethanol and letting them dry, then having another go.

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