Expression descriptors and plc acknolwedgments

I have two separate Lookout Direct questions here...
The first is about the characters following expressions, such as the ":b" in V0002:b... I'd like to know what they are called and where I can find them in the Lookout Direct manuals! I spent about an hour looking for a list/explanation but could not find one. I was watching a timer value in an expression and without the :b there the value did not match the PLC value. I'm guessing this is some sort of typecast?
Secondly, I'm curious if there is a tutorial or suggested method on having Lookout wait for an PLC acknowledgement for a data or state change? I used LatchGates but am not sure if it's the best way to do such a thing.
Thanks,
Dave

davey31415 wrote:
The first is about the characters following expressions, such as the ":b" in V0002:b... I'd like to know what they are called and where I can find them in the Lookout Direct manuals! I spent about an hour looking for a list/explanation but could not find one. I was watching a timer value in an expression and without the :b there the value did not match the PLC value. I'm guessing this is some sort of typecast?
The characters are Data Modifiers. They are covered in Appendix B of the LookoutDirect Getting Started manual ... which is over at AutomationDirect.com: http://web2.automationdirect.com/static/manuals/lkdm/lkdm.html#gsg.
In this case it is a BCD thing.
=====================================================
Fading out. " ... J. Arthur Rank on gong."
Attachments:
DataModifiers.jpg ‏63 KB

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