CHAPTER 5 - Inferface circuits
MANIU04.9607 GB 03/97
Page 5.2
set by parameters
P12, OUT1_A
and
P14, OUT2_A,
with the possibilities shown in Table
5/3
Table 5/3
OUT1_A and OUT2_A
Meaning
1
Current analog reference I_ref
2
Speed reference W_ref
3
Available for further developments
4
Actual speed monitor
5
Torque signal monitor
6
Available for further developments
7
Available for further developments
8
Reference current monitor phase U
9
Reference current monitor phase V
The configuration also makes it possible to set the scaling factor for the representation of the
internal numerical values: in fact, once the analog full scale has been set in the range ±10V, it
is possible to change the resolution of the representation with parameters
P13, DA1SHF
and
P15, DA2SHF,
that determine the number of shifts and therefore the number of divisions by 2
of the numerical value before representing it in an analog way. In this way the user can set
the use of these signals arbitrarily.
Since in the majority of cases the most significant numerical values are motor rotation speed
and delivered torque, the default configuration of these outputs is OUT1_A=4 and OUT2_A=5
respectively. In this case the two shift parameters (P13 and P15) are set to zero and the full
scale is calculated automatically, basing on the limits set with
P4, W_MAX,
that is maximum
speed, and
P5, I_MAX
for maximum torque (maximum current). When the maximum values
of P4 and P5 are reached, the representation on output has a value equal to +7.5V (or -7.5V
if negative) rather than +10V, allowing a further 25% margin for overshoots.
