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Watch Dog Timer and FSV
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Hi, I have a coupe of Avantech modules 4010/Lan and WISE 4060 they have 4 Digital in and 4 relays on them and there are a cost-effective good quality unit. In the software configuration on the "PLC" they offer a FSV (Fail Save Valve) which some how works with a watch dog timer (WDT). Basically if the module can't talk to the timer for a set period of time it goes to fail safe and a predefined relay state.
Talking to tech support I cant make head and tails of this. There aren't any settings of IP address on the module it's self for the WDT, so how dose it knows what to talk to, to verify connectivity? They ask me to look into a modbus master system...? I guess I have one.Is there such a standard in Modbus TCP? and is this supported by Mango?
I did find a document, talking about how to install under windows a specific watchdog timer service, made by Avantech which would make perfect sense to me.
I really think the support guy has no clue.
I'm sure someone would have come across about this before? Any clue would be appriciatedRegards
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Hi Eightbit,
I would assume that it is setting a modbus register with some value on a fixed interval. This would mean the watchdog client they supply has the fields to supply the connection (meaning the watchdog is the modbus master). If you could figure out what register / value is being set (and that is indeed what is happening), you could have Mango perform that action, probably through the Scripting data source calling .set() on the watchdog point, but there are options as well.
I would expect it to be in the device's manual.
