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Found 3 results

  1. Dear Community, Is it possible to have a bit trigger a message box? I have some ladder logic that determines if high and low user definable setpoints are equal to each other or inverse to each other. undesirable setpoint conditions make bit named SP> and SP= go true. Right now I have and indexed HMI text element that shows: legal entries, sp = illegal, sp> illegal, both illegal. I don't really want to trigger an alarm (though i could). The message box would be a nice way to signal operator of an illegal entry. I can't use legal entry ranges on numeric elements because legality is conditional to other setpoints. Thanks -dB
  2. We have a Unistream HMi which is connected to a remote Modbus Slave (Prosoft PLX31 Modbus Gateway) I need to read the bits from particular words which hold the status of sensors mapped to the Gateway tables. On the holding register entry page, it does not allow for just reading 1 bit of a word. Is there a work-around or some example of plc logic that will take that register and read the bits into a bit-array? Thank you,
  3. I'm working on understanding the RLO to Bit function block, personal knowledge more so than application use. I think I have a fairly decent idea of the applications of it but I'd like to get an idea of an actual use on it. In my head it seems to be an unnecessary abstraction of other combinations of function blocks. Any feedback or application examples would be immensely helpful. Thank you!