Scaling Of Messages - ABB SPA-ZC 302 Installation And Commissioning Manual

1MRS755014
5.4.8.7.
Profibus-DPV1/SPA Gateway
Installation and Commissioning Manual
Fig. 5.4.8.6.-1 Indirect SPA Message dialog
The definitions of the Indirect SPA message settings are the following:
Description Signal name
Slave Address The slave address of the protection relay or unit
Ch/Cat/Dno The Channel (Ch), Category (Cat), and the Data number (Dno)
where the specific Analog values are read/written on the SPA
slave device. It must be verified that the parameter (Ch/Cat/Dno)
in question exists in the SPA slave.
Read/Write Identifies the request either W (write) or to R (read). The default
value is R (read).
StaticData (Optional) Data that is assigned the write command. There can
be many SPA write messages that always use the same static
value for example reset commands. This is only valid for write
commands. If the message is defined to be R (read), then the
StaticData is ignored.
Scaling Scaling factor, for details see Section 5.4.8.7. Scaling of
messages.
In Use The In Use flag indicates if the parameter was found in the
connected SPA slave device during the initialization phase. In
the Template info field the In Use flag is marked with number 1.
An unselected check-box indicates that the parameter was not
found. For details, see Section 4.7. In Use flags.

Scaling of messages

Scaling of values may be necessary in order to get the precision of the values that
the application requires. It may also be necessary to take scaling into consideration
when commands are sent from the application.
There are two means to scale values in the gateway: global scaling and parameter
specific scaling.
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