Carrier EQT1-4 - Network Communication and Routing

Equipment Touch screens
Screen name
Description
Communication
Lets you edit the information below for the controller. Touch a field to tap in new
information.
BACnet Device Instance
number
Auto Generate Device ID
–Enter No or Yes
You can edit the following fields that 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.
Router
Lets you view or edit the router's ARC156, MS/TP, or Ethernet network number. Touch a
field to tap in the new number on the keypad.
Equipment Touch Carrier Proprietary and Confidential CARRIER CORPORATION ©2014
Rev. 4/9/2014 All rights reserved
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