Author Topic: Creating a 485/422 Host...  (Read 364 times)

GlennP

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Creating a 485/422 Host...
« on: June 22, 2018, 06:44:13 am »
Hi,
Long time since I have been here, but I want to make sure I configure correctly for a 485/422 host.  I am guessing the host is defined as the device that transmits the packet of data over the network to each device.

Jan Axelson

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Re: Creating a 485/422 Host...
« Reply #1 on: June 22, 2018, 08:37:25 am »
RS-485 and RS-422 are hardware standards only. They don't address protocols.

An RS-422 network has one driver and up to ten receivers.   

An RS-485 network can have multiple drivers and receivers and can use any protocol to decide who gets to transmit. For example, a designated node might send messages that include a node address, and the addressed sends a response. Or the nodes might transmit in a defined sequence.

GlennP

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Re: Creating a 485/422 Host...
« Reply #2 on: June 22, 2018, 09:28:38 am »
Ah, I am right the 'host' is the PC/Widget sending the data.