ATR243 - User manual -
25
Modbus RTU protocol features
Baud-rate
Selection on parameter 70
bd.rt.
:
4.8 k
4.800 bit/Sec.
9.6 k
9.600 bit/Sec.
19.2k
19.200 bit/Sec.
28.8k
28.800 bit/Sec.
38.4k
38.400 bit/Sec.
57.6k
57.600 bit/Sec.
Format
8, N, 1 (8 bit, no parity, 1 stop)
Supported
functions
WORD READING (max 20 word) (0x03, 0x04)
SINGLE WORD WRITING (0x06)
MULTIPLE WORDS WRITING (max 20 word) (0x10)
Looking at the table here below it is possible to find all available addresses and functions:
RO
Read Only
R/W
Read / Write
WO
Write Only
Modbus
Address
Description
Read Only
Reset
value
0
Device type
RO
EEPROM
1
Software version
RO
EEPROM
5
Slave address
R/W
EEPROM
6
Boot version
RO
EEPROM
50
Automatic addressing
WO
-
51
System code comparison
WO
-
500
Loading default values (write 9999)
R/W
0
510
Setpoints storing time in eeprom (0-60 s)
R/W
10
999
Process subjected to the visualization filter
RO
-
1000
Process (degrees.tenths for temperature sensors;
digits for linear sensors)
RO
-
1001
Setpoint 1
R/W
EEPROM
1002
Setpoint 2
R/W
EEPROM
1003
Setpoint 3
R/W
EEPROM
1004
Setpoint 4
R/W
EEPROM
1005
Alarm 1
R/W
EEPROM
1006
Alarm 2
R/W
EEPROM
1007
Alarm 3
R/W
EEPROM
1008
Setpoint gradient
RO
EEPROM
1009
Relay status (0 = Off, 1 = On):
Bit 0 = Relay
Q1
Bit 1 = Relay
Q2
Bit 2 = Reserved
Bit 3 =
SSR
RO
0
1010
Heating output percentage (0-10000)
RO
0