E
<p><b> Current Setup </b></p>
Four Gas Turbines {GT1, GT2, GT3, GT4} each with its own (HMI,Mark V and exciter) + one extra "<i>Master</i>" HMI in the control room.
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<p><b> Connection </b></p>
There are three different connections:
1- Stage Link: which is the "<i>ARCNET</i>" connected in a bus/daisy chained as follows..<pre>
A coaxial cable goes from Master HMI to GT1 HMI using a T connector.
Then from GT1 HMI to GT1 Mark V. Then from GT1 Mark V to GT1 Exciter.
After that it goes to GT2 HMI... then GT3... and GT4 in the same manner.</pre>
2- PDH: which is a star fiber/Ethernet network that goes from the master HMI to each GT HMI using a separate switch in each GT.
3- DCS: which is the serial connection from each HMI to the DCS.
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<p><b> Symptoms </b></p>
GT2 data can't be seen by GT2 local HMI. However, other HMIs (including the master) can see GT2 data.
Moreover, GT2 HMI can see some others (<i>GT1,GT3, GT4</i>) data. At the same time DCS can't see GT2 data.
<i>...BUT...</i>
If the coax cable coming from GT1 (<i>Exciter</i>) to GT2 HMI is disconnected, GT2 Data comes back in GT2 local HMI and DCS.
In this case, previous HMIs (Master, GT1) can't see the remaining (GT2, GT3, GT4) which make sense since they are isolated.
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<p><b> Additional Information </b></p>
When I type "<i>arcwho</i>" command in GT2 HMI during normal connection, only four addresses show up + the local address.
{My address: F2
Nodes found: F5 F1 31 01}
After disconnection, nine addresses show up + the local address.
{My address: F2
Nodes found: FF F4 F3 5B 4D 3F 2B 1D 0F}
Another thing found in GT4 ToolboxST is that GT1 & GT2 have the same secondary proxy which is GT2. This was corrected but nothing changed. (I believe this might lead to incorrect data but not to "<i>No Data</i>")
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===========================================================
<i>I'm sure that I'll find the answer in this wonderful forum.
I really count on you, specially on the Genius CSA.</i>
Four Gas Turbines {GT1, GT2, GT3, GT4} each with its own (HMI,Mark V and exciter) + one extra "<i>Master</i>" HMI in the control room.
-------------------------------------------------------------------------------
<p><b> Connection </b></p>
There are three different connections:
1- Stage Link: which is the "<i>ARCNET</i>" connected in a bus/daisy chained as follows..<pre>
A coaxial cable goes from Master HMI to GT1 HMI using a T connector.
Then from GT1 HMI to GT1 Mark V. Then from GT1 Mark V to GT1 Exciter.
After that it goes to GT2 HMI... then GT3... and GT4 in the same manner.</pre>
2- PDH: which is a star fiber/Ethernet network that goes from the master HMI to each GT HMI using a separate switch in each GT.
3- DCS: which is the serial connection from each HMI to the DCS.
-------------------------------------------------------------------------------
<p><b> Symptoms </b></p>
GT2 data can't be seen by GT2 local HMI. However, other HMIs (including the master) can see GT2 data.
Moreover, GT2 HMI can see some others (<i>GT1,GT3, GT4</i>) data. At the same time DCS can't see GT2 data.
<i>...BUT...</i>
If the coax cable coming from GT1 (<i>Exciter</i>) to GT2 HMI is disconnected, GT2 Data comes back in GT2 local HMI and DCS.
In this case, previous HMIs (Master, GT1) can't see the remaining (GT2, GT3, GT4) which make sense since they are isolated.
-------------------------------------------------------------------------------
<p><b> Additional Information </b></p>
When I type "<i>arcwho</i>" command in GT2 HMI during normal connection, only four addresses show up + the local address.
{My address: F2
Nodes found: F5 F1 31 01}
After disconnection, nine addresses show up + the local address.
{My address: F2
Nodes found: FF F4 F3 5B 4D 3F 2B 1D 0F}
Another thing found in GT4 ToolboxST is that GT1 & GT2 have the same secondary proxy which is GT2. This was corrected but nothing changed. (I believe this might lead to incorrect data but not to "<i>No Data</i>")
-------------------------------------------------------------------------------
===========================================================
<i>I'm sure that I'll find the answer in this wonderful forum.
I really count on you, specially on the Genius CSA.</i>