ABB SPA OPC Server User Manual page 40

Section 4 Engineering
SPA Signals
After you have added the required objects to the SPA OPC Server Configuration Tool,
you need to configure them, see Configuring objects on page 46.
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An OPC item tag/node representing a signal, usually a command or
an indication. There are seven types of signals, see Adding SPA
Signal objects on page 44. Signals describe the actual information
that a device or module provides. The signals and their icons are the
following:
Double Indication
A signal consisting of two bits (double binary). Bit values are
presented as an integer value 00=0, 01=1, 10=2 and 11=3.
Single Indication
A signal presenting one bit information, values: 0 or 1.
Analog Input
A signal presenting floating point value information.
Digital Input
A signal presenting integer value information.
Command
Signal for controlling binary outputs.
Pulse Counter
A signal presenting long integer value information.
Analog Setpoint
A signal for controlling analog setpoints/outputs.
Overview of the engineering
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