Read Data from Temperature Controller using MATLAB, Need Help
Step 1) Get a serial terminal program  (like realterm)
Step 2) Set the device to your RS485 controller
Step 3) Set the baud rate (the default for the temp controller is 19200 baud)
Step 4) Set the stop bits and parity bits 8, N, 1 (8 bit, no parity, 1 stop)
Step 5) 


  EN26Parameter   has  the  same  meaning  of  cycle  time  for  heating
  action .Parameter   (Cooling  Fluid)  pre-selects  the  proportional 
  band  multiplier  and the cooling P.I.D. cycle time  according to
  cooling fluid type:Cooling fluid type Air1.00 10Oil 1.254Water2.502 Once
  parameter , has been selected, the parameters , and  can be however
  modified.9  Serial CommunicationATR401-22ABC-T is provided with RS485
  and can receive / broadcast data  via  MODBUS-RTU  protocol.  Device 
  can  be  configured  only  as Slave.This  function  allows  to 
  control  multiple  controllers  connected  to  a  supervisory system. 
  Each instrument will answer to a Master query only if contains same
  address as on parameter 93 .Allowed addresses are from 1 to 254 and
  there should not be controllers with the same address on the same
  line.Address  255  can  be  used  by  the  Master  to  communicate 
  with  all  connected  equipment's  (broadcast  mode),  while  with  0 
  all  devices  receive command, but no answer is expected.ATR401  can 
  introduce  an  answer  delay  (in  milliseconds)  to  Master 
  request.This delay has to be set on parameter 94 .At each parameters
  modification, instrument stores values in EEPROM memory (100000
  writing cycles), while setpoints are stored with a delay of 10 seconds
  after last modification.


Then see if you can access one of the registers and read values out of it. 

Once you have done this in realterm, then transfer the baud rate/stop/parity bits to matlab and try and read the register there.