STP-iS2207 Series Turbomolecular Pump 
 
MT-89E-001-C
Page 124 
5
SERIAL COMMUNICATION PROTOCOL 
5.4.21  ReadOptions 
Function:  Reads  the  setting  value  of  optional  function.  The  parameter  n  depends  on  the  optional 
function. 
Transmission frame: 
           
*1
       
PC->SIM
Stx
0
0
1
?
0
Parameter 1  Etx
LRC
 
SIM->PC
                  Ack
 
PC→SIM
         
*1 
      Ack
SIM→PC
Stx
0
0
1
Sp
0
Parameter 1 to n  Etx
LRC
 
*1
  HEX code of the ASCII character '0' is "30". 
 
Parameter
Item  Data format  Remark 
1  Optional function number 
(receive/return) 
16-bits hexadecimal 
coded ASCII 
see Table 31 
2 to n  Function items (return)     
 
Optional function number  Value  Total response parameter n
Remark 
Second speed option setting  0014  4  see 5.4.21.1 
Second speed selection  0015  2  see 5.4.21.2 
Table 31 - Option function number and parameter list 
 
5.4.21.1  Second speed function setting 
Settings for second speed can be changed. 
Parameter
Item  Data format  Remark 
1  Optional function number
16-bits hexadecimal 
coded ASCII 
0014 hex 
2  Second speed setting 
(Unit: Hz) 
16-bits hexadecimal 
coded ASCII 
 
3  Second speed option 
setting 
16-bits hexadecimal 
coded ASCII 
0000 hex:DISABLE
00FF hex:ENABLE 
4  Selected speed value 
(Unit: Hz) 
16-bits hexadecimal 
coded ASCII