is used to ensure that both servers are identical.When using an IGSS dualized server solution, which is a hot standby
server solution, the Dual Server Synchronization
utility is used to ensure that both servers are identical.
The utility can be run on any PC in the network where the IGSS software has been installed. For example it could be run from one or the other of the two server PCs in the dualized system, from an IGSS operator station or from a dedicated PC, which only runs Dual Server Synchronization.
Important: Never run the Dual Server Synchronization utility from more than one PC in the network. Doing so will result in errors for which no warning will be given.
There are certain parameters that are not automatically updated between the servers. These are typically configuration changes, which are not reflected in the PLCs to which the two servers in the dualized system are connected.
The Dual Server Synchronization utility is used for updating these parameters, which are:
|
Parameter name |
What it is |
|---|---|
|
Local object |
Objects not found in the PLCs to which both servers are connected in a dualized system, i.e. objects created "locally" on the one or the other server. |
|
Local ACK |
Acknowledgement of alarms where the alarm atom is set to local on the Edit Mapping tab under I/O mode. |
|
Alarm inhibit |
Operator initiated alarm blocking, which always originates "locally" due to operating personnel decision in light of specific situations. |
In Definition you can create a digital object to monitor the states of the two dualized servers. For more info, click here.
To activate the synchronization function, double click on the SYNC icon found in
the IGSS program group and the Sync Server
Configuration dialog box appears.
To continue with the next steps in setting up the Sync Server, click here.