STP-iS2207 Series Turbomolecular Pump 
 
MT-89E-001-C
Page 94 
5
SERIAL COMMUNICATION PROTOCOL 
 
Parameter
Item  Data format  Remarks 
1  The number of error  8-bits hexadecimal 
coded ASCII 
Up to 80 errors 
*1
2 to 81 
*1
  Error 1  8-bits hexadecimal 
coded ASCII 
*2 
…  … 
Error 80 
*1
  8-bits hexadecimal 
coded ASCII 
*1  The maximum number of errors may differ depending upon the software version of the STP pump. It is recommended that 
an application be designed as variable-length data. 
*2  Value corresponding to the error message is transmitted, (refer to Table 24 and Table 25). The most recent error has the 
largest parameter number. When the number of errors being detected is under the maximum number, the value of 
parameter that is larger than the number of errors being detected is set to 0. 
 
Example:   
The number of error  : 02
hex
 = 2 errors 
Error 1  : 0D
hex
 = 13 = Disturbance Xh 
Error 2  : 0F
hex
 = 15 = Disturbance Xb 
Error 3 to 80  : 00
hex
 = No error detected 
 
Parameter
1  2  3  4  5  6  7  8  9  10 
ASCII  0
2
0
D
0
F
0
0
0
0
0
0
0
0
0
0
0
0
0
0
HEX  30
32
30
44
30
46
30
30
30
30
30
30
30
30
30
30
30
30
30
30
 
Parameter
11  12  13 
[Omitted]
68  69  70  71  72  73 
ASCII  0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
HEX  30
30
30
30
30
30
30
30
30
30
30
30
30
30
30
30
30
30
 
Parameter
74  75  76  77  78  79  80  81 
ASCII  0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
HEX  30
30
30
30
30
30
30
30
30
30
30
30
30
30
30
30