have the IO manual, some of the instructions were clear, but not all. We are
getting your standard IO box, with the default ACM’s which I think are 1 and 2
are 4-20 ma. Our dew point monitor has outputs of -112 to +68 dew point for the
4-20 ma. We want an alarm at -20 dew point. I want to know where to make a
change if we need to for that set point. We want one to read on the IO box, and
both to read out on the TX box. We will bring in a dry contact to close on run,
and want to view that on the TX as well as the dew point and the fault. I hope
I can understand how this is all set up so next time I won’t need help. How do I set this box up to do this, and then how do I set the TX to read this
It's correct the ACM 1 & 2 are 4-20mA ACM types.
In attach you can check the I/O commissioning form for the configuration of the Analog inputs 1& 2 and the Digital inputs 1 & 2.
Value Offset - Vo : minimum value of sensor
Value Range - Vr : is the difference between min and max of sensor
I applied a multiplier of 10 on Vo en Vr to get one decimal on display & TX
Therefore : DF is set to 02
I did the same multiplier applies to alarm settings :
Fault High level Setpoint - FH (i.e.-200)
Fault Low level Setpoint - FL (i.e. -1120)
Set low level alarm = Vo setting (your minimum)
Here you can see the configuration on the TX
Example :how to set up IO1-A
Example : how to set up IO1-D
Alternatively, you can display dew point values on the system page (through IO-SYS page configuration) :
In attach you can find a list with the different gauge styles with the example for each number/style.
In the Fieldbus table of the product you can find the registerlength who give the information about the data.
For example registerlength 1 = 16 bit
Below the multiplier we can see "FFFFFFFF" this is a default setting that allows to read the full register.
This setting is not necessary to change.
About the units listing I have degrees Fahrenheit underneath because I need to change the value of the multiplier and if we don't put the setting underneath it's not possible to change this value.