Edwards SCU-800

SCU-800 Control Unit for Turbomolecular Pump
MT-49E-101-G
Page 89
5
SERIAL COMMUNICATION
PROTOCOL
5.4.7 ReadCounters
Function: Reads serial number, running time and start counter.
Transmission frame:
PC->SIM
Stx
0
0
1
?
c
Etx
LRC
SIM->PC
Ack
PC->SIM
Ack
SIM->PC
Stx
0
0
1
Sp
c
Parameter 1 to 23
Etx
LRC
Parameter
Item
Data format
Remarks
1 to 10
Control unit serial number
4-bits ASCII character
11 to 20
Pump serial number
4-bits ASCII character
21
Pump running time
(Unit: minute)
32-bits hexadecimal coded
ASCII
22
Control unit running time
(Unit: minute)
32-bits hexadecimal coded
ASCII
23
Start counter
32-bits hexadecimal coded
ASCII
Example:
Control unit serial number
: 12345
Pump serial number
: 6789A
Pump running time
: 0000003C
hex
= 60 minutes = 1 hour
Control unit running time
: 0000028C
hex
= 652 minutes =10 hours and 52 minutes
Start counter
: 00000064
hex
= 100 times
Parameter
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
ASCII
1
2
3
4
5
6
7
8
9
A
HEX
31
32
33
34
35
20
20
20
20
20
36
37
38
39
41
20
20
20
20
20
Parameter
21
22
23
ASCII
0
0
0
0
0
0
3
C
0
0
0
0
0
2
8
C
0
0
0
0
0
0
6
4
HEX
30
30
30
30
30
30
33
43
30
30
30
30
30
32
38
43
30
30
30
30
30
30
36
34