modbus - negative values

[Fahd]

Hi!, 

I'm having trouble reading negative values (analog-value , Holding register) from a Modbus device using profiles. Specifically, I'm trying to read a value that should be -10, but I’m getting 65436 from the LM5.

Thanks in advance

{ "name": " Temperature Control Outdoor Air Curve Outdoor Air 1 Setpoint ", "bus_datatype": "float16", "type": "register", "address": 1100,"units": "°C" , "value_multiplier": 0.1, "writable": 1},

[Daniel]

Did you try different datatype?

[admin]

Default "datatype" is "uint16", you need to add "datatype": "int16" to your profile.

[Fahd]

Default "datatype" is "uint16", you need to add "datatype": "int16" to your profile.

I change it to this (bellow) and still have the same issue 

{ "name": " Temperature Control Outdoor Air Curve Outdoor Air 1 Setpoint  ", "bus_datatype": "float16", "dataype": "int16" , "type": "register", "address": 1100,"units": "°C" , "value_multiplier": 0.1, "writable": 1},

{ "name": " Temperature Control Outdoor Air Curve Outdoor Air 2 Setpoint  ", "bus_datatype": "float16", "dataype": "int16" ,"type": "register", "address": 1101,"units": "°C" , "value_multiplier": 0.1, "writable": 1},

[Daniel]

What is documentation saying about this register?

[admin]

You have a typo in your profile field: dataype instead of datatype

[Fahd]

What is documentation saying about this register?

Variable_Type : HoldingRegisters 
Variable_Index : 1100
Scale : - 1
Data_Type : 16bit signed
Access :  R/W
Unit :  °C
Range  : -300 to 450

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You have a typo in your profile field: dataype instead of datatype

Thaaanks a lot