Edwards SCU-800

SCU-800 Control Unit for Turbomolecular Pump
MT-49E-101-G
Page 81
5
SERIAL COMMUNICATION
PROTOCOL
5.4 Command specifications
5.4.1 Command list
Function
code
Command/Query Name
Function
?
D
ReadMeas
Reads the measured rotational speed.
Sp
E
Command
Sends commands START, STOP, RESET (valid
when MANUAL/REMOTE switch is selected ON.)
?
F
ReadFailMess
Reads the errors being detected.
?
M
ReadModFonct
Reads the pump operation mode and the errors
being detected.
?
V
ReadVersion
Reads the software version of the SCU-800.
?
c
ReadCounters
Reads serial number, running time and start
counter.
?
d
ReadSetPoint
Reads the setting values of the speed set point
and the TMS temperature.
?
e
ReadMotorTemp
Reads the measured motor temperature.
?
f
ReadStatus
Reads the various settings.
(Remote mode, TMS function, INHIBIT and
emergency vent valve).
?
g
ReadEvents
Reads the error record.
Sp
h
SetSpeedSetPoint
Changes the speed set point.
*1
?
h
ReadSpeedSetPoint
Reads the speed set point.
?
m
ReadModFonctWithWarning
Reads the pump operation mode, the errors and
the warnings being detected
?
[
ReadMeasValue
Reads the TMS temperature, motor temperature
and measured rotational speed.
Table 20 - Command list
*1
There is an endurance limit of setting changes (no more than 24 times per day for about ten years). If this limit is exceeded, it
not only may become impossible to change the setting but can also cause pump failure. Do not make setting changes in
excess of this endurance limit.