Edwards SCU-1600

SCU-1600 Control Unit for Turbomolecular Pump
March 10 88 Issue 1-a
5
SERIAL COMMUNICATION PROTOCOL
5.4.8 ReadSetPoint
Function: Reads the setting value of the "Speed Set Point" and TMS temperature. The "Speed Set
Point" data is the same data as that of "ReadSpeedSetPoint".
Transmission frame:
PC->SIM Stx 0 0 1 ? d Etx LRC
SIM->PC Ack
PC->SIM Ack
SIM->PC Stx 0 0 1 Bsp d Parameter 1 to 2 Etx LRC
Parameter Item Data format Remarks
1 Speed Set Point
(Unit: Hz)
16-bits hexadecimal coded
ASCII
2 TMS temperature setting
(Unit: ºC)
16-bits hexadecimal coded
ASCII
Example:
Speed Set Point : 01F4
hex
= 500 Hz = 30,000 rpm
TMS temperature setting : 003C
hex
= 60 ºC (140 ºF)
Parameter 1 2
ASCII 0 1 F 4 0 0 3 C
HEX 30 31 46 34 30 30 33 43
5.4.9 ReadMotorTemp
Function: Reads the measured motor temperature.
Transmission frame:
PC->SIM Stx 0 0 1 ? e Etx LRC
SIM->PC Ack
PC->SIM Ack
SIM->PC Stx 0 0 1 Bsp e Parameter 1 Etx LRC