Please consider registering

sp_LogInOut Log In sp_Registration Register

Register | Lost password?
Advanced Search

— Forum Scope —

— Match —

— Forum Options —

Minimum search word length is 3 characters - maximum search word length is 84 characters

sp_Feed Topic RSS sp_TopicIcon
INFO - Prosys OPC UA Modbus Server - alarm management
December 22, 2022
11:24, EET
Francesco Zambon
Forum Posts: 30
Member Since:
December 20, 2021
sp_UserOfflineSmall Offline

Good morning,

Please I need to know if the Prosys OPC UA Modbus Server handles the alarms of Modbus slave devices.

I have a Modbus slave that displays machine alarms as bits in a register.

Is it possible to map these “Modbus bit alarms” into OPC UA variable nodes / OPC UA events and add further information (alarm name translated into language, description, severity, …)?

Thanks in advance for your support,

December 22, 2022
12:53, EET
Matti Siponen

Forum Posts: 230
Member Since:
February 11, 2020
sp_UserOfflineSmall Offline


You can represent the bit in the register as an OPC UA Variable. Clients can subscribe to this Variable with MonitoredItems and react accordingly. But there is no way to generate OPC UA Events based on the bit in Modbus Server.

When creating the Variable that represent the bit, you can choose its Name and Description. You can use those to inform Clients that the Variable represents a bit that in turn represents a machine alarm.

Forum Timezone: Europe/Helsinki

Most Users Ever Online: 518

Currently Online:
9 Guest(s)

Currently Browsing this Page:
1 Guest(s)

Top Posters:

hbrackel: 124

pramanj: 86

ibrahim: 74

rocket science: 65

kapsl: 57

Sabari: 51

gjevremovic: 49

Xavier: 43

fred: 41

TimK: 41

Member Stats:

Guest Posters: 0

Members: 684

Moderators: 15

Admins: 1

Forum Stats:

Groups: 3

Forums: 15

Topics: 1335

Posts: 5711

Newest Members:

daniel.boada@soprasteria.com, Ratheesh, Dustingen, janessawhittell, ravi_prabhakar, dustyy137676428, Douglasabibe, DonaldWibip, kennithmazza4, Heiko Geissler

Moderators: Jouni Aro: 963, Otso Palonen: 32, Tuomas Hiltunen: 5, Pyry: 1, Petri: 0, Bjarne Boström: 877, Heikki Tahvanainen: 402, Jukka Asikainen: 1, moldzh08: 0, Jimmy Ni: 25, Teppo Uimonen: 21, Markus Johansson: 42, Niklas Nurminen: 0, Matti Siponen: 230, Lusetti: 0

Administrators: admin: 1