Edwards SCU-1601

SCU-1601 Control Unit for Turbomolecular Pump
MT-96E-1B1-0
Page 97
5
SERIAL COMMUNICATION PROTOCOL
5.4.2 ReadMeas
Function: Reads the measured rotational speed.
Transmission frame:
PC->SIM
Stx
0
0
1
?
D
Etx
LRC
SIM->PC
Ack
PC->SIM
Ack
SIM->PC
Stx
0
0
1
Sp
D
Parameter 1 to 2
Etx
LRC
Parameter
Item
Data format
Remarks
1
[System reservation]
56-bits hexadecimal
coded ASCII
2
Measured rotational speed
(Unit: Hz)
16-bits hexadecimal
coded ASCII
Example:
Measured rotational speed: 02DC
hex
= 732 Hz = 43,920 rpm
Parameter
1
2
ASCII
*1
*1
*1
*1
*1
*1
*1
*1
*1
*1
*1
*1
*1
*1
0
2
D
C
HEX
30
32
44
43
*1 System reservation
5.4.3 Command
Function: Sends the pump operation commands START, STOP and RESET. These commands
function in the same way as when each switch of the SCU-1601 is pressed. They are valid when
MANUAL/REMOTE changeover switch on the SCU-1601 is "ON" and when being sent to the serial
port which is set as the input operation port in the remote operation mode setting. Refer to Section
3.11, "Parameter set mode".
Transmission frame:
PC->SIM
Stx
0
0
1
Sp
E
Parameter 1
Etx
LRC
SIM->PC
Ack
PC->SIM
Ack
SIM->PC
Stx
0
0
1
#
Etx
LRC