Integer Controlled Step Position Information (Isc); Analogue Set Point (Apc); Attributes; General Information About Attributes - ABB COM600 series User Manual

Name Type
t TimeStamp
5.2.18.
Name Type
ctlVal INTEGER
valWTr ValWithTrans
q Quality
t TimeStamp
5.2.19.
Name Type
ctlVal AnalogueValue
mxVal AnalogueValue
q Quality
t Timestamp
5.3.
5.3.1.
54
COM600 series, Version 5.1
Modbus Serial Slave (OPC) User's Manual
Value/ Value
range

Integer controlled step position information (ISC)

Value/ Value
range
-64 ... 63

Analogue set point (APC)

Range / Value
range

Attributes

General information about attributes

In addition to item tags for process data (indications and commands), the OPC servers
and clients also provide some item tags for controlling the devices and retrieving status
information from them. These item tags are called attributes.
There are three categories of attributes:
1. Modbus Serial Slave OPC Client attributes
2. Modbus Serial Channel attributes
3. Modbus Serial IED attributes.
These attributes are described in the following subsections.
Mandat- Protocol informa-
ory/Optional tion element
M <none> | Time of
occurrence
Mandat- Protocol informa-
ory/Optional tion element
M Control Value
M State
M Modbus status
M <none> | Time of
occurrence
Mandatory / Protocol informa-
Optional tion element
M Control Value
M Current Value
M Modbus status
M <none> | Time of
occurrence
1MRS756913
OPC data types
VT_DATE
OPC data types
VT_I1
VT_I4
V_I4
V_DATE
OPC data types
VT_R4
VT_R4
VT_I4
VT_DATE