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Appendix C - AIN Registers

When using the Mux80 with a Modbus compatible device, such as the T7, use the following registers to read the extended analog inputs.

Mux80 AIN Registers
Name Start Address Type Access

AIN#(48:127)             Returns the voltage of the specified analog input.

96 FLOAT32 R

AIN#(48:127)_RANGE             The range/span of each analog input. Write the highest expected input voltage.

40096 FLOAT32 R/W

AIN#(48:127)_NEGATIVE_CH             Specifies the negative channel to be used for each positive channel. 199=Default=> Single-Ended.

41048 UINT16 R/W

AIN#(48:127)_RESOLUTION_INDEX             The resolution index for command-response and AIN-EF readings. A larger resolution index generally results in lower noise and longer sample times.

41548 UINT16 R/W

AIN#(48:127)_SETTLING_US             Settling time for command-response and AIN-EF readings.

42096 FLOAT32 R/W

AIN_ALL_RANGE             A write to this global parameter affects all AIN. A read will return the correct setting if all channels are set the same, but otherwise will return -9999.

43900 FLOAT32 R/W

AIN_ALL_NEGATIVE_CH             A write to this global parameter affects all AIN. Writing 1 will set all AINs to differential. Writing 199 will set all AINs to single-ended. A read will return 1 if all AINs are set to differential and 199 if all AINs are set to single-ended. If AIN configurations are not consistent 0xFFFF will be returned.

43902 UINT16 R/W

AIN_ALL_RESOLUTION_INDEX             The resolution index for command-response and AIN-EF readings. A larger resolution index generally results in lower noise and longer sample times. A write to this global parameter affects all AIN. A read will return the correct setting if all channels are set the same, but otherwise will return 0xFFFF.

43903 UINT16 R/W

AIN_ALL_SETTLING_US             Settling time for command-response and AIN-EF readings. A write to this global parameter affects all AIN. A read will return the correct setting if all channels are set the same, but otherwise will return -9999. Max is 50,000 us.

43904 FLOAT32 R/W

For more information on multiplexing with the U6, see U6 Channel Numbers 

For more information on multiplexing with the UE9, see UE9 Channel Numbers