Xylem H-4161 - Manual (Page 18)

3-2 SDI-12 Command and Response Protocol
H-4161
3.1 Command Summary
The H-4161 supports the following SDI-12 commands:
Standard Commands:
aM! Make measurement
aM1! Make special measurement
aD0! Send Data
aV! Verify
aI! Send Identification
a! Send Acknowledge
aAn! Change Address
Extended Commands:
aXTEST! Displays the current module settings
aXHELP! Displays the supported commands
aXRMM! Read Module Mode (0=Monitor, 1=Initiate)
aXWMMn! Write Module Mode (0=Monitor, 1=Initiate)
aXRMA! Read Monitored Address (0-9, A-Z, a-z)
aXWMAn! Write Monitored Address (0-9, A-Z, a-z)
aXRMP! Read Monitored Parameter (1 to 9)
aXWMPn! Write Monitored Parameter (1 to 9)
aXRAC! Read AutoScan command setting (0 to 9)
aXWACn! Write AutoScan command setting (0 to 9)
aXRMR! Read Measure Rate (seconds)
aXWMRdd! Write Measure Rate (seconds)
aXSTM! Set Transparent Mode
aXRIH! Read High (max) data value for 20.0mA
aXWIHdd! Write High (max) data value for 20.0mA
aXRIL! Read Low (min) data value for 4.0mA
aXWILdd! Write Low (min) data value for 4.0mA
aXSCSdd! Set Current Stage (for testing 4-20mA)
aXSMdd! Set Milliamp output (for testing 4-20mA)
Factory use only:
aXSDACdd! Set the DAC to dd counts (for testing 4-20mA)
aXSCL! Set Calibration Low (DAC=500)
aXSCH! Set Calibration High (DAC=65000)
aXRCL! Read DAC Calibration Low
aXWCLdd! Write DAC Calibration Low
aXRCH! Read DAC Calibration High
aXWCHdd! Write DAC Calibration High