Host Engineering Forum
General Category => Do-more CPUs and Do-more Designer Software => Topic started by: ATU on January 07, 2021, 10:16:31 AM
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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?
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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.
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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.
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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?
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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.
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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.
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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.