E2408DF
Rev 27.05.2021
Modbus RTU Communication
Modbus main holding registers (00xxx or 40xxx): 0-based, decimal
Reg RW
Description
Supported values
1 R
hardware version
0...65535
2 R
software version
3 R
product serial number
0...65535
4 RW*
Slave ID [1...247]
0...247
5 RW*
baud rate
1200, 2400, 4800, 9600, 19200, 38400,
57600
6 RW**
Response delay, ms
1...255 ms
7 RW*
Stop bits
1, 2, 3, 4
8 R
Last error code
1...255
17 RW***
Technological: data age in
seconds (read) / restart(write)
0...65535 s (read), 42330(write)
167 RW*
Change rate limit for
pressure data, pressure units
1...32000 pressure units,0=no limit
168 RW*
Integrating filter time constant
for pressure data, s
1...32000 s, 0=no filter
201 RW**
Parameter assigned to OUT1
0=none, 1=temperature,
2=pressure, 9=forced Modbus
control, value set in 203
202 RW**
Parameter assigned to OUT2
0=none, 1=temperature,
2=pressure, 9=forced Modbus
control, value set in 204
203 RW**
Forced value for OUT1
0...1000 (0.0%...100.0% of scale)
204 RW**
Forced value for OUT2
0...1000 (0.0%...100.0% of scale)
211 RW**
Parameter assigned to RE1
0=none, 1=T, 2=P, 9=forced by 213
212 RW**
Parameter assigned to RE2
0=none, 1=T, 2=P, 9=forced by 214
213 RW**
Forced state for RE1
0=off, 1=on (relay control by Modbus)
214 RW**
Forced state for RE2
0=off, 1=on (relay control by Modbus)
215 RW**
Switch delay for RE1
0...1000 s, default 0
216 RW**
Switch delay for RE2
0...1000 s, default 0
11
