Edwards, nEXT Turbomolecular Pumps, nEXT240, nEXT300 and ...

B800-00-880 Issue B
3.7.5 Command set
Table 16 shows a summary of the full set of commands available for controlling and monitoring the nEXT pump.
Table 17 shows the abbreviations that are used to define commands in the following sections and Table 18 shows the
error codes that might be returned.
Table 16 - Summary of commands that can be sent to the nEXT pump
Object name Command Parameter
range
Node !S850
?S850
Pump type ?S851 7;
10;
4
Pump control !C852 0
1
?V852 0.1800;
32-bits
Vent options !S853
?S853
Timer setting !S854
?S854
Power limit setting !S855
?S855
Normal speed
setting
Standby speed
setting
Temperature
readings
Link parameter
readings
!S856
?S856
!S857
?S857
Factory
setting
Data
type
Units
Comments
0.99 - decimal address Multi-drop address
0 = disable multi-drop address
99 = wildcard
0
1
2
3
4
5
6
7
8
?V859 0.100;
0.100
?V860 0.500;
0.300;
0.15000
- string
string
string
chars
chars
chars
Pump type
DSP software version number
(D396496XXX for nEXT)
Full speed RPS (1000 for nEXT)
- decimal - Stop the pump
Start the pump
- decimal
hex
RPS
flags
Measured motor speed
System status word
0 decimal Hard vent only when 50% speed or
hard vent if