DXMIO

[ATU]

If I had several DXMIO racks connected to a BRX.  What is the reasonable update time for IO in the rack?  If Communications is lost with the slave, do the output shut off?

[BobO]

If I had several DXMIO racks connected to a BRX.  What is the reasonable update time for IO in the rack?  If Communications is lost with the slave, do the output shut off?

I've not ever profiled the performance (weird, I know), but I'd guess a few milliseconds. Output state is either cleared or held, as specified by the configuration.

[Controls Guy]

DM native RIO, correct?   I assume Modbus might be a bit slower.

Is the DM native I/O asynch to the scan?  Not randomly asynch like an AB CLX, necessarily, but capable of communicating during the ladder execution part of the scan?   I assume not.

[ATU]

In the Slave configuration it says " On Slave Error Inputs will"   Radio buttons for "Hold" or "Clear"  I thought that was odd, should it not be Outputs?

[BobO]

In the Slave configuration it says " On Slave Error Inputs will"   Radio buttons for "Hold" or "Clear"  I thought that was odd, should it not be Outputs?

Sorry, my bad. Outputs always clear.

[BobO]

DM native RIO, correct?   I assume Modbus might be a bit slower.

Is the DM native I/O asynch to the scan?  Not randomly asynch like an AB CLX, necessarily, but capable of communicating during the ladder execution part of the scan?   I assume not.

There are different meanings to async vs sync. It updates during the comm slice, so it's synchronous to the PLC scan, but only when new data is available.

[Controls Guy]

Yeah, that's what I was asking and what I was assuming given that you only have one CPU doing one thing at one time.