How do you read and write Multistate values to a 3rd party device on a mstp bus?
Just read the value, it will be a number just like you configure the MSV in the T3000 range/units field. Whatever you are using to read & write the MSV’s, your application or the device , will need to know how to handle MSV’s of course.
To follow up on this…
Trying to read a multi-state value from a BACnet MSTP controller through a T3 Nano.
The program editor in the T3000 software will not accept MSV as a valid object type, and throws the following message: “Use instance only support AV AI AO DO in line xx”.
I have no issue with AV and BV objects, but it seems that MSV is not a supported type… so is this product fully BACnet compliant or not?
Could you show us the program line that you’re using. Far as I know the T3 controllers deal with an MSV like an integer, 1, 2, 3 and so on for each state.
10 IF+ IN1 THEN VAR1 = VAR1 + 1
20 IF+ IN2 THEN VAR1 = VAR1 - 1
30 VAR1 = MAX( 1 , MIN( VAR1 , 3 ) )
This would step an MSV up and down between 0 and 3 based on two momentary contacts connected to in1 and in2.
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Hi Maurice, I want to read a MSV from a 3rd party Daikin Chiller, and I get the same errors “Use Instance only support AV AI AO DO in line xxx”
For e.g Line 110 MSV refers to (ICE, COOL, HEAT, PURSUIT) for the MSV I want to read. What do you recommend I do?
Chelsea will check this out for you, could be we havent implemented remote MSV reads. She will add it asap.
Hi Maurice, if you could expiate this, it will be great as I don’t know any other way I will be able to change its modes. I’ve attached the BACnet point in the Daikin unit that needs to be changed.
This task has been added to Chelsea’s list. I will ask her to put a push on it asap.
Great, as I’ve won this job and I just assumed that we could read and write MSV’s. I don’t want to change out the controller as I’ve already received the T3-LB. The great thing about the TEMCO controls is the BACnet and MODBUS capabilities. I need MODBUS for my MODBUS screen.
Hi Maurice, any steps closer to being able to transfer values from a MSV 3rd party BACnet controller?
Stand by for good news this week. (holiday just now).
