Edwards nEXT nEXT85 - Multi-Drop Operation

Object name
Command Parameter
range
Factory
seng
Data type Units
Comments
Vent opons 2 !864 0 8 decimal Hard vent when < 50%
speed if stop or fail
?864 1 Controlled vent if > 50%
speed then hard vent if <
50% speed if stop or fail
2 If stop, hard vent
If fail, hard vent when
< 50% speed
3 If stop, hard vent
If fail, controlled vent
> 50% speed then hard
vent < 50% speed
4 If fail, hard vent
If stop, hard vent when
< 50% speed
5 If fail, hard vent
If stop, controlled vent >
50% speed then hard
vent < 50% speed
6 Hard vent if stop or fail
7 Same as opon 6
8 Output is permanently
energised (Fan ON)
9 Do not use
10 Output is permanently
de-energised (Fan OFF)
11 Do not use
12 Do not use
13 Do not use
14 Hard vent when < 50%
speed if stop
15 Controlled vent if > 50%
speed then hard vent if
< 50% speed if stop.
4.6.5 Mul-drop operaon
With mul‑drop mode, a single computer system can communicate with more than one
pump. Each pump must be assigned its own individual address before it can be installed
in a mul‑drop system. The command to assign the mul‑drop address is sent in
standard nEXT message format. Refer to Assigning a mul-drop address on page 64.
The message protocol in the mul‑drop mode is dierent than the protocol given for the
serial messages in the single pump systems. The dierences in the mul‑drop message
protocol are:
Page 52
B8G000880_D - Installaon