Modbus Serial Slave Opc Client Attributes - ABB COM600 series User Manual

1MRS756913
5.3.2.
COM600 series, Version 5.1
Modbus Serial Slave (OPC) User's Manual
The server does not automatically update the attributes according to the update rate of
the OPC group. Instead, the client must explicitly refresh the group, or request a read of
single attributes to retrieve the latest values. This is not necessary for most attributes,
since they do not change their value spontaneously. The exceptions are the diagnostic
counters and object status attributes. Object status attributes are updated automatically
by system messages, so in practice only diagnostic counters are affected by this rule. It
was introduced to avoid overloading the communication link between the protocol stack
and the OPC server.

Modbus Serial Slave OPC Client attributes

Table 5.3.2-1 Modbus Serial Slave OPC Client attributes
Property / Parameter
Protocol Stack Version
Reset
File Version
Product Version
Value or Value range/ Default
Value: Version information
Description
Data type: Text.
Access: Read-only.
The version information of the
Protocol Stack.
The Reset button for resetting
the OPC Client.
File version of the executable
OPC Client.
Version information of the
installed OPC Client.
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