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TruVu™ ET display screens
TruVu™ ET Display (part# EQT2)
CARRIER CORPORATION ©2020
Installation and Start-up Guide
All rights reserved
16
Screen name
Description
Communication
Lets you edit the controller's information described below. Touch a field to type in new information.
BACnet Device Instance
number
Auto Generate Device ID
– Turn Off or On.
The following fields pertain to the controller's MS/TP network:
Max Masters
- Set this to the highest MAC address (up to 127) on the MS/TP network. If you later
add a device with a higher address, you must change this field to that new address.
Max Info Frames
- Specifies the maximum number of information messages a controller may
transmit before it must pass the token to the next controller.
CAUTION Increasing this number allows the controller to transmit more messages while it has the
token, but it also increases the overall time it takes for the token to pass through the network.
•
For a router, set this value to a high number such as 200.
•
In non-router controllers, use the following formula to calculate this value:
[2 - (devices * (.002 + (80/baud))] / [(600/baud) * devices] = Max Info Frames
For example, if the network has 15 devices at 19200 baud, Max Info Frames would be 4.
NOTE
You may need to increase the result of the formula for controllers that need to
communicate many values to other devices.
Summary of Contents for TruVu EQT2
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