Model S4000T
35
8.8.3 Status/Error
A read returns the Alarm state and Errors that are occurring at the present time which
are indicated by bit position.
Function
Bit
Position Access
Alarm
15
MSB
Read
Warn
14
Read
Fault
13
Read
Not
Used
12
Read
Not
Used
11
Read
Not
Used
10
Read
Not
Used
9 Read
Switch
Error
8 Read
Setup
Error
7 Read
Calibration
Check
Timeout
6 Read
EEPROM
Error
5 Read
EPROM
Error
4
Read
Sensor
Error
3 Read
Fail
to
Calibrate
2 Read
Low
Supply
Voltage
1 Read
8.8.4 Unit Type
A read returns the Decimal Value 4000. This identifies the S4000C.
A read returns the Decimal Value 4001. This identifies the S4000T.
8.8.5 Software Revision
A read returns the software revision of the S4000T in 2 ASCII characters.
8.8.6 Status Block
A read returns a 6 byte message containing the analog (2 bytes), Mode (1 byte),
Status/Error (2 bytes), and Sensor Life (1 byte) in that order. For the format of each
byte, refer to the appropriate individual commands.
8.8.7 Alarm Settings
A read returns the present Alarm settings of the S4000T. A write command changes
the settings to the requested values. The setpoints are programmable in 5% FS
steps. (1% FS steps for 20ppm range).
A 1 in the 9
th
bit position means the output is latching, a 0 means it is Non-Latching.
A 1 in the 8
th
bit position means the output is normally energized a 0 means it is
normally De-Energized. The Alarm setpoint cannot be set below the Warn setpoint.
Factory default is: 60% FS, latching, de-energized.
Exception: Returns an Exception Code 01 (illegal function) if an illegal write is
requested.