14
G
THERMASGARD
®
RTM 1- Modbus
| Telegrams
Function 04 Read Input Register
Register
Parameter
Data Type
Value
Range
3x0001
Temperature
4 s sampling
Signed 16 Bit
– 350...+ 800
– 35.0 ... + 80.0 °C
3x0002
Temperature
Filtering
Signed 16 Bit
– 350...+ 800
– 35.0 ... + 80.0 °C
3x0003
Sollwert Potentiometer
Signed 16 Bit
0...1000
0...100.0 %
3x0004
Dew point
Computed value
Signed 16 Bit
0... 500
0...+ 50.0 °C
3x0005
Relative humidity
Filtering
Signed 16 Bit
0...1000
0...100.0 % r.H.
Function 08 Diagnostics
The following
sub function codes
are supported
Sub Function
Code
Parameter
Data Type
Answer
00
Echo of transmission data
(Loopback)
Echo data
01
Restart Modbus
(Reset listen-only mode)
Echo telegram
04
Activation listen-only mode
No answer
10
Delete counter
Echo telegram
11
Counter bus telegrams
Unsigned 16 Bit
All valid bus telegrams
12
Counter communication errors
(Parity, CRC, frame errors, etc.)
Unsigned 16 Bit
Faulty bus telegrams
13
Counter exception telegrams
Unsigned 16 Bit
Error counter
14
Counter slave telegrams
Unsigned 16 Bit
Slave telegrams
15
Counter telegrams without answer
Unsigned 16 Bit
Broadcast messages (address 0)
Function 17 Report Slave ID
Composition of answer telegram
Byte No.
Parameter
Data Type
Answer
00
Number of bytes
Unsigned 8 Bit
6
01
Slave ID (device type)
Unsigned 8 Bit
4 =
THERMASGARD
®
MODBUS
02
Slave ID (device class)
Unsigned 8 Bit
10 =
THERMASGARD
®
/
THERMASREG
®
03
Status
Unsigned 8 Bit
255 = RUN, 0 = STOP
04
Version number (release)
Unsigned 8 Bit
1...9
05
Version number (version)
Unsigned 8 Bit
1…99
06
Version number (index)
Unsigned 8 Bit
1
