Avatar
Please consider registering
guest
sp_LogInOut Log Insp_Registration Register
Register | Lost password?
sp_Search Search
Advanced Search
Advanced Search
Forum Scope


Match



Forum Options



Minimum search word length is 3 characters - maximum search word length is 84 characters
sp_Search Search
Go to Bottom
sp_Feed Topic RSSsp_TopicIcon
from Device and Cache
August 2, 2016
11:19, EEST
Avatar
jura
Member
Members
Forum Posts: 16
Member Since:
March 14, 2014
sp_UserOfflineSmall Offline
Go to Top
1sp_Permalink sp_Print

Hello.
Pressure:=TPsInteger.Create(nil);
Pressure.Value:= 21;
IDX := MyOPCProvider.AddressSpace.AddVariable(RootIndex, Pressure, ‘Pr’);

After adding the variable Pressure into the address space
how to determine event what OPC client reads the associated Item ,
and how to determine what is the required reading from the Cache or from the Device ?

August 3, 2016
15:21, EEST
Avatar
Heikki Tahvanainen
Member
Members
Forum Posts: 402
Member Since:
April 17, 2013
sp_UserOfflineSmall Offline
Go to Top
2sp_Permalink sp_Print

Hello,

Thank you for the question. OPC DA doesn’t really make it possible to know which OPC Client is making the read.

There’s no support for Device read at the moment, so you cannot react to that in the application.

sp_Feed All RSS
Go to top
Forum Timezone: Europe/Helsinki
Most Users Ever Online: 1919
Currently Online:
Guest(s) 62
Top Posters:
Heikki Tahvanainen: 402
hbrackel: 144
rocket science: 100
pramanj: 86
Francesco Zambon: 83
Ibrahim: 78
Sabari: 62
kapsl: 57
gjevremovic: 49
Xavier: 43
Member Stats:
Guest Posters: 0
Members: 773
Moderators: 7
Admins: 1
Forum Stats:
Groups: 3
Forums: 15
Topics: 1558
Posts: 6567
Newest Members:
aracelyhaley4, raphaelschonell, Ashmag, kathyreimann56, brittanylemos, dorthycundiff76, PromotionToold, CHHinrichs, rodricklienhop, jose_Wanderlei
Moderators: Jouni Aro: 1039, Pyry: 1, Petri: 1, Bjarne Boström: 1054, Jimmy Ni: 26, Matti Siponen: 359, Lusetti: 0
Administrators: admin: 1