Issue
What is the purpose of modbus registers 35 and 36 in the TC900.
Product Line
Field Devices
Environment
TC900
Cause
Further detail required for registers 35 and 36 and how they interact.
Resolution
The TC900 allows either the onboard sensor or an external sensor or a value e.g. a temperature value binded to a modbus (16bit unsigned) value be written to the TC900 and be used.
Register 24 determines if the in-built sensor (00) or the external sensor (01) is displayed on the screen
If register 35 = 00, then the sensor set in register 24 is displayed.
Register 36 has the ability to be the binded sensor and be written to (FC06) with a value x10. e.g 23.5 should be writte as 235.
If register 35 = 01, then the value in register 36 is displayed on the screen.
However, if register 23 = 01, then the setpoint is displayed on the screen.
Note, in the TC900, registers start at 0000, therefore in EBO add '1'.
