Trane VarioTrane TR1 2800 Series, Руководство по эксплуатации

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Parameter number (PNU)
Bits no. 0-10 are used to transfer parameter numbers. The relevant parameter's function is defined in the pa-
rameter description in the section entitled
Programming .
Index
Index is used together with the parameter number to
read/write-access parameters that have an index, e.g.
parameter 615
Error code
. The index is made up of 2
bytes, one lowbyte and one highbyte, but only the
lowbyte is used as an index.
Example - Index:
The first error code (index [1]) in parameter 615
Error
code must be read.
PKE = 1267 Hex (read parameter 615 Error code .)
IND = 0001 Hex - Index no. 1.
The frequency converter will respond in the parame-
ter value block (PWE) with a fault code value from 1 -
99. See
Summary of Warnings and Alarms to identify the
fault code.
Parameter value (PWE)
The parameter value block consists of 2 words (4 bytes), and the value depends on the defined command (AK).
If the master prompts for a parameter value, the PWE block does not contain a value.
If you wish the master to change a parameter value (write), the new value is written in the PWE block and sent
to the slave.
If the slave responds to a parameter request (read command), the present parameter value in the PWE block is
transferred and returned to the master.
If a parameter contains not a numerical value, but several data options, e.g. parameter 001
Language where [0]
corresponds to English , and [3] corresponds to Danish , the data value is selected by entering the value in the
PWE block. See Example - Selecting a data value .
Via serial communication it is only possible to read parameters that have data type 9 (text string). Parameter
621 - 635
Nameplate data is data type 9. For example, in parameter 621 Unit type it is possible to read the unit
size and mains voltage range.
When a text string is transferred (read) the length of the telegram is variable, as the texts are of different lengths.
The telegram length is defined in the telegram's second byte, known as LGE.
To be able to read a text via the PWE block the parameter command (AK) must be set to 'F' Hex.
The index character is used to indicate whether it is a
read or write command.
In a read command the index must have the following
format:
TR1 2800 Series VFD 59
Programming