Edwards SCU-801

SCU-801 Control Unit for Turbomolecular Pump
MT-95E-001-A
Page 87
5
SERIAL COMMUNICATION PROTOCOL
Parameter
Item
Data format
Remark
1
Pump operation command
8-bits hexadecimal coded
ASCII
Refer to Table 22
Pump operation command
Value
START
1
STOP
2
RESET
4
Table 22 - Pump operation commands
Example:
Pump operation command : RESET operation = 4 = 04
hex
Parameter
1
ASCII
0
4
HEX
30
34
5.4.4 ReadFailMess
Function: Reads the errors being detected. This data is the same data as that of "ReadModFonct"
parameter 2 to 79 or "ReadModFonctWithWarning" parameter 3 to 80.
Transmission frame:
PC->SIM
Stx
0
0
1
?
F
Etx
LRC
SIM->PC
Ack
PC->SIM
Ack
SIM->PC
Stx
0
0
1
Sp
F
Parameter 1 to 78
*1
Etx
LRC