Dräger Regard 3910 - Modbus Function

26 Dräger REGARD 3900 Modbus TCP/IP Gateway
Modbus function
5 Modbus function
The Alarm Accept signal is generated when the Modbus Master writes data value 1 to address
40251.
Bit Status
0 A1
1 A2
2 A3
3 F1
4 F2
5 Maitenance
6 Underrange
7 Overrange
Modbus function 04 - registers (words): Example for Channel 01
Channel Register addresses
01 30002-30006
02 30017-30021
03 30032-30036
04 30047-30051
05 30062-30066
06 30077-30081
07 30092-30096
08 30107-30111
09 30122-30126
10 30137-30141
11 30152-30156
12 30167-30171
13 30182-30186
14 30197-30201
15 30212-30216
16 30227-30231
Calculation of the Gas Value:
(Gas Level x Range) / 1000 = Value
Modbus function 03,06,16
Holding Registers :
Channel Register addresses
01 40007-40016
02 40022-40031
03 40037-40046
04 40052-40061
05 40067-40076
06 40082-40081
07 40097-40106
08 40112-40121
09 40127-40136
10 40142-40151
11 40157-40166
12 40172-40181
13 40187-40196
14 40202-40211
15 40217-40226
16 40232-40241
ComError CAN Bus Gateway Register address 30242
Information
Register
addresses
Gas Level 30002
Range 30003
Resolution 30004
Decimal Places 30005
Status 30006
Gas Name 40007-40010
Gas Unit 40011-40014
Reserved 40015
Reserved 40016
The alarm status byte contains
alarm and channel status bits:
The High Byte reflects the Low Byte