8. Menu 75 Parameters
ALSPA PROFIBUS Field Bus Coupler
Page 8-8
Technical Manual
(09/06)
To configure the first parameter source, set P75.31 = 9.01
To configure the second parameter source, set P75.32 = 9.05
To configure the third parameter source, set P75.33 = 9.07
To configure the final parameter source, set P75.34 = 9.08
Note:
When entering parameters via the Keypad, it is
important that any leading zeros are entered after the
decimal point. Entering 9.1 will result in P9.10 being
used, not P9.01.
Entering a value of 0 in a source pointer parameter will mean that a
corresponding value of 0 is written to the PROFIBUS network.
8.5.12
Reference Scaling and Masking, P75.28 to P75.29
Internally, the drive represents 100.00% with a value of 10000. The
PROFIDRIVE profile can represent 100.00% with a value of 16384.
In order to scale received set point references to the drive’s internal
representation for 100.00% the parameter P75.28 is available that
allows the user to specify the numerical value being used by the
PROFIBUS network to represent 100%. At default the value is set
to 10,000.
As not all references may require scaling, a Scale Reference Mask,
P75.29, is provided to enable scaling on selected references. By
default the first and last received words are not scaled as these are
normally used for control flags. The lowest 6 bits in the mask are
used for the scale mask, the remaining bits are ignored.
Table 8-5 Scale reference mask
Bit
7 6 5 4 3 2 1 0
Apply scale to PPO PZD word:
Default
│ │ │ │ │ │ │ └
─
1
0
│ │ │ │ │ │ └ ─
─
2
1
│ │ │ │ │ └ ─ ─
─
3
1
│ │ │ │ └ ─ ─ ─
─
4
1
│ │ │ └ ─ ─ ─ ─
─
5
1
│ │ └ ─ ─ ─ ─ ─
─
6
0
│ └ ─ ─ ─ ─ ─ ─
─
not used
0
└ ─ ─ ─ ─ ─ ─ ─
─
not used
0
