20 - ATR244 - User manual
Modbus RTU protocol features
Supported
functions
WORD READING (max 50 word) (0x03, 0x04)
SINGLE WORD WRITING (0x06)
MULTIPLE WORDS WRITING (max 50 word) (0x10)
Here below a list of all available addresses and supported functions:
RO = Read Only R/W = Read/Write WO = Write Only
Modbus
address
Description
Read
Write
Reset
value
0 Device type RO 47x
1 Software version RO Flash
2 Boot version RO Flash
3 Slave Address RO Eepr/dip
6 Baud rate RO Eepr/dip
50 Slave address automatic learning WO -
51 System code comparison for slave address automatic learning WO -
500 Loading default values (write 9999) RW 0
501 Restart ATR244 (write 9999) RW 0
502 Setpoint storing delay time RW 10
503 Parameters storing delay time RW 1
1000 AI1 value (degrees with tenth) RO -
1001 AI2 value (degrees with tenth) RO -
1002 Average between AI1 and AI2 [(AI1 + AI2) /2] (degrees with tenth) RO 0
1003 Difference between AI1 and AI2 (AI1 - AI2) (degrees with tenth) RO 0
1004
Module of the difference between AI1 and AI2 (|AI1 - AI2|) (degrees with
tenth)
RO 0
1005 Sum of AI1 and AI2 (AI1 + AI2) (degrees with tenth) RO 0
1006 Real setpoint (gradient) of the regulation loop 1 RO 0
1007 Real setpoint (gradient) of the regulation loop 2 RO 0
1008
Alarms status (0=absent, 1=present)
Bit0 = Alarm 1 Bit3 = Alarm 4
Bit1 = Alarm 2 Bit4 = Alarm 5
Bit2 = Alarm 3 Bit5 = Alarm 6
RO 0
1009
Error flags 1
Bit0 = AI1 process error (sensor 1)
Bit1 = AI2 process error (sensor 2)
Bit2 = Cold junction error
Bit3 = Safety error
Bit4 = Generic error
Bit5 = Hardware error
Bit6 = Error H.B.A. (partial ropture of the load)
Bit7 = Error H.B.A. (SSR in short circuit)
Bit8 = Overcurrent error
Bit9 = Parameters out of range error
Bit10= CPU eeprom writing error
Bit11= RFid eeprom writing error
Bit12= CPU eeprom reading error
Bit13= RFid eeprom reading error
Bit14= Eeprom calibrations bench corrupted
Bit15= Eeprom constants bench corrupted
RO 0
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