30 ATR 621 - User manual  
Modbus 
address
Description
Read 
Write
Reset 
value
1013
Error  ags 
Bit0 = Eeprom writing error
Bit1 = Eeprom reading error
Bit2 = Cold juntion error
Bit3 = Error AI1 (sensor 1)
Bit5 = Generic error
Bit6 = Hardware error
Bit7 = Missing calibration error
Bit8 = Eeprom cycle reading error
RO 0
1014 Cold juntion temperature (degrees with tenth) RO -
1200
Cycle selection for remote start 
1 = cycle1
…
15 = cycle15
16 = controller
17 = output manual control 
R/W 1
1201 Remote Start/Stop (0 = STOP, 1 = START) R/W 0
1202
Remote setpoint for controller (degrees with 
tenths of degree for temperature sensors; 
digits for linear sensors).
R/W 0
1203
Remote setpoint for controller with process 
decimal point selection.
R/W 0
1204
Remote manual control output percentage 
(0-100)
R/W 0
1205
Remote manual control output percentage 
(0-1000)
R/W 0
1206
Remote manual control output percentage 
(0-10000)
R/W 0
1207
Manual tuning ON/OFF 
0 = Tuning o  1 = Tuning on
R/W 0
1210 OFF LINE  time* (milliseconds) R/W 0
2001 Parameter 1 R/W EEPROM
…. …. R/W EEPROM
2100 Parameter 100 R/W EEPROM
4001 Parameter 1** R/W EEPROM