Devatec ElectroVap - Communication Protocols; MODBUS RTU & BACNET MSTP Parameters; RS485 Protocol Mapping Details

ELECTROVAP® ELMC
26
3.8.3 MODBUS RTU and BACNET MSTP communication parameters
Network must be composed exclusively of humidifiers to avoid communication errors. Requests transiting the BUS
must not exceed 15 bytes.
Modbus RTU
Bacnet MSTP
Speed of communication
2400 / 4800 / 7200 / 9600 (default) / 14400 / 19200 / 28800 / 38400 / 57600 /
115200 / 230400
Packet size
8 bits
Parity Bit
Not
Stop bit
2
1
Timeout response
5000ms (5sec)
Time between requests
(After a response received)
Min. 100ms
Standard
3.8.4 Communication protocol for RS485 interface - MODBUS and BACNET
Modbus
Register
Address
Bacnet Object
Class / instance # / ID (hex)
Description
Value
10001
BI
0
00C00000
Contactor
1 = production -- 0 = no production
10002
BI
1
00C00001
High-level detection
1 = reached-- 0 = no reachec
10003
BI
2
00C00002
High limit switch
1 is opened -- 0 is closed
10004
BI
3
00C00003
Fill valve
1 = filling – 0 = no filling
10005
BI
4
00C00004
Drain valve
1 = draining -- 0 : no draining
10006
BI
5
00C00005
relay X10 (term. 3-4): Blower
pack / remote ON/OFF,
service, default
1 : relay ON -- 0 : relay OFF
10007
BI
6
00C00006
maintenance returns
1 is ON -- 0 is OFF
10008
BI
7
00C00007
Alarm returns
1 is ON -- 0 is OFF
1
BO
0
01000000
On/Off BMS command
1 = ON : Start requested / 0 = Off: Stop Unit
2
Bv
1
01400001
Not used
Not used
3
Bv
2
01400002
option 1 (with card 8 SB relay)
1: ON -- 0: OFF
4
Bv
3
01400003
option 2 (with card 8 SB relay)
1: ON -- 0: OFF
5
Bv
1
01400001
option 3 (with card 8 SB relay)
1: ON -- 0: OFF
6
Bv
2
01400002
option 4 (with card 8 SB relay)
1: ON -- 0: OFF
30001
Have
0
00000000
Type unit
1: Steam Bath, 2: ELMC,3: CMC, 13: EHU 750
30002
Have
1
00000001
Register version
1
30003
Have
2
00000002
Current
10 x (A)
30004
Have
3
00000003
Steam output
10 x (Kg/hr)
30004
Have
3
00000003
Run status
0: Idle 1: Steam Gen 2: End of season 3: Failure 4:
Manual drain 5: Maintenance