Bad file descriptor?
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I frequently get the following error on a Modbus IP data source:
'polecat1ADAM': Exception from modbus master: Bad file descriptor (ioctl FIONREAD failed)
Any suggestions?
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Hi pyeager,
Someone else encountered this message in this thread: https://forum.infiniteautomation.com/topic/3360/urgent-alarm-identification
And persuaded themselves it had to do with the spottiness of the internet connection they were polling. Are you using TCP with keep alive, or just TCP?
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Mango is on the same LAN with the Modbus IP devices.
I was using TCP, and have switched to TCP with keepalive to see if that helps.