zenOPCSrv: the zenon OPC DA server does not return a valid value on a SyncIO::Read from DEVICE for an active group / active item

• Related Articles

• Checklist: OPCDA Server

  Time estimate: 20 minutes Please go through all the points in the following checklist. If necessary, confirm with IT Department any information you cannot verify before contacting your local COPA-DATA Representative. Do NOT use DCOM in combination ...

• IEC61850 Server - valKind RO (Read Only) must also be taken in account for DA with FC = SP and SE

  Description The IEC61850 Server did not refuse written values on valKind RO (Read Only) for DA with FC = SP and FC = SE. The issue has been addressed. Now the IEC61850 Server refuses written values on valKind RO (Read Only) for DA with FC = SP and FC ...

• At redundancy switch of zenon servers, a variable with "alternative value" (ALT_VAL) suddenly gets the INVALID bit added - breaking ALC

  Description When a variable with INVALID status gets switched to "alternative value" some drivers on the active server add status ALT_VAL and remove status INVALID for this variable. After the standby server takes over the active role (redundancy ...

• FAQ: How can I browse an OPC UA Server using the zenon OPC UA Client Driver?

  Go to Drivers > New Driver Create a Driver of Type "OPC UA Client Driver" Open the Driver Configuration Go to "Connections" Create a new Connection Enter your Discovery URL Enter your Server URL manually or click the 3 dots to browse the Discovery ...

• FAQ: Where can I find the XML device profile for COPA-DATA DNP3 drivers?

  What is a DNP3 XML device profile? Where can I find the XML device profile for one of the following drivers? DNP3_TG - Subset Level 1,2,3 and 4 for both requests and responses, DNP3 Master driver for zenon Service Engine AccessDNP3_SG - Subset Level ...