Applies To:
  • CitectSCADA 6.x, 7.x
Summary:
I am trying to read register 432000 with Modbus v2.6.4.1, but the read fails with an ErrDriver 258 (0x102).

However, I can read the 400000-416000 range properly.

The help file mentions that the 400000-465536 is supported by the driver

 

Solution:
This is a bug in Modbus v2.6.4.1, and was fixed in driver hotfix v2.06.17.003. This driver allows reads for the 400000-465536 range. This driver has yet to be officially released. 

Please contact Citect Support to obtain the hotfix for the driver or for further information.

 
Keywords:
 modbus, address out of range, high register, large address

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