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Entry type: FAQ Entry ID: 24072753, Entry date: 11/21/2006
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How can you block the polling of individual stations in a SINAUT dedicated line network?

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Instructions:
If dedicated-line subscribers are to be added to a SINAUT project, which were not all available when the plant was commissioned, then calling the stations leads to a higher polling cycle, because the missing stations do not yet respond to the call through the central TIM.

In the SINAUT project you can temporarily suppress polling through the central TIM by blocking the missing stations in the central TIM's polling list.

There are two different procedures for this as described below.

Note:
This function is generally only available for dedicated lines.

1. Offline procedure
In the Offline procedure you edit the polling list of the central TIM using the SINAUT ST7 configuration tool offline in the project.
 

No. Procedure
1

Open the project in the SINAUT ST7 configuration tool.

2

Open the subscriber manager for the project.

3 Open the Properties by double-clicking on the Central TIM and select the "Polling List" tab.

Note:
In the case of a TIM 4 there might also be two "Polling List" tabs if a dedicated network or radio network is connected to both the internal and the external interfaces of the TIM 4. In the "Polling List" tab opened in each case you can see whether it is the list of the internal or external interface.

4 Double-click on the TIM of the station to be blocked and the "Properties - Poll list entry" window opens. Here you can disable or enable polling by the Central TIM.


Fig. 01

 

Note:
There must be at least one station enabled for polling in the polling list.
Disabling the last station is not permitted by the diagnostics tool; the relevant block in the "Properties - Poll list entry" window is gray and you cannot make any changes.

5 Compile the SINAUT project (only SDBs have to be newly generated) and transfer the newly generated SDBs into the Central TIM, then the disabled station will no longer be polled.
Table 01

This method has the advantage that at each time the Central TIM is rebooted the parameterization of the enabled/disabled station is retained.
The disadvantage of this method is that new SDBs have to be generated and transferred to the TIM in order to disable/enable a station. After transfer of the SDBs you must reboot the TIM to activate the new SDB contents.

2. Online procedure
In the Online procedure you edit the polling list of the central TIM using the SINAUT ST7 Diagnostics and Service tool online in the TIM.
 

No. Procedure
1 Open the project in the SINAUT ST7 Diagnostics and Service tool.
2 Open the TIM subscriber diagnostics in the Central TIM. There must be a connection set up between the computer and the Central TIM in order to be able to use the functions.


Fig. 02

 
3 Select the "Polling intern" or "Polling extern" tab.

Note:
In the case of a TIM 4 there might also both tabs available if a dedicated network or radio network is connected to both the internal and the external interfaces of the TIM 4.

Open the Enable / Disable Subscriber window by double-clicking on the TIM of the station to be disabled.


Fig. 03

 
4 In the window that opens is a display of the current state of the subscriber (enabled or disabled). By clicking on the "Toggle State" button you can enable/disable the subscriber during operation.


Fig. 04

 
5 The display of the online state of the subscriber changes accordingly.
In the list, the cross for "Station polling enabled" is removed (column F).


Fig. 05

 

Note:
There must be at least one station enabled for polling in the polling list.
Disabling the last station is indirectly prevented by the diagnostics tool, you can click on the "Toggle State" button and it is acknowledged as being correctly executed, but the cross remains in column F of the polling list. Polling has not been disabled.

Table 02

This online method has the advantage that you can change the list of stations to be polled without having to generate new SDBs. It is not even necessary to reboot the TIM.
The disadvantage of this method is that changes to the polling list are not stored permanently. Each time the TIM starts up the changes to the polling list are deleted and replaced by the original SDBs.

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