Edwards SCU-350 Series

SCU-350 Series Control Unit for Turbomolecular Pump
MT-21E-201-E
Page 67
5
SERIAL COMMUNICATION PROTOCOL
5.3.4 Queries
5.3.4.1 List of Queries
Query Syntax Replies
Alarm State ?A
{alarm state, alarm code1, alarm
code 2---}
Control state ?C {SIM control state}
Pump state ?P {pump state, alarm state}
Parameter
?V {n}
n=1, 2, 3
{value}
If a value cannot be returned because the hardware is not functioning, a space character is returned.
5.3.4.2 Description of individual queries
1. ?A ：?A Alarm state
See Section 5.5.2 for the alarm state and Section 5.5.3 for the alarm codes. Send all numbers if there
are two or more alarms detected.
Syntax SIM reply
?A
Alarm state, Alarm code1, Alarm
code2…..
Example: 2, 4, 8
2. ?C SIM control state
See Section 5.5.4 for the SIM control state.
Syntax SIM reply
?C
0 = no control
1 = SIM has control
Example: 0