NORD Drivesystems BU0020 - Manual (Page 87)

7 Data transmission
BU 0020 GB-2612 87
If the parameter to be processed is also an array parameter (e.g. position array for the POSICON
option), then the sub-index of the required parameter can additionally be accessed via Bit 10 to Bit 15
of the sub-
index (0 = array element 1, 1 = array element 2,…):
Array element Parameter set Index
5 (000101
BIN
) 2 (01
BIN
) 15
HEX
= 0001 0101
BIN
21 (010101
BIN
) 4 (11
BIN
) 57
HEX
= 0101 0111
BIN
If a parameter is not dependent on the parameter set, then Bits 8 -15 are used for the sub-index.
Please refer to the operating instructions for details of the structure of the individual parameters and
which values may be called up.
If the sub-index is used, nos. 6, 7, 8 or 11, 12 must be used as the order label (see Section
7.5.1), in order for the sub-index to be effective.
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7.5.3 Parameter value (PWE)
According to the type of the PPO or parameter, transfer of the parameter value (PWE) is always as a
word (16 Bit) or double word (32 Bit) Only one parameter value can be transferred in a telegram.
A 32 bit parameter value comprises PWE1 (High value word) and PWE2 (Low value word, 4th word).
A 16 Bit parameter value for PPO1 and PPO2 is transferred in PWE2. For negative values the High
word must be set to FFFF hex.
Note
32 Bit parameter values are only used with the posicon option. All relevant parameters
are described in the supplementary posicon instruction manual.
The parameter value is transferred as an integer value. For parameters with resolutions 0.1 or 0.01
the parameter value must be multiplied by the inverse of the resolution.
Example
A run-up time of 99.99 seconds is to be set.
99.99s  99.99 * 1 / 0.01 = 99.99 * 100 = 9999
Therefore the value 9999
dec
= 270F
hex
must be transferred.
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