Functional Software description
8
DCS 500 Software Description
Analog Input Error Codes
Analog input error codes can be seen from the ERR pin, if the
hardware and software scalings are not compatible. Error codes
are shown below.
Error
Code
Text
Description
0
NO FAULT
No faults or CONV MODE = 0
1
I < 4 mA
CONV MODE = 2 and I < 4 mA
2
NO IOB-1/IOB-3
No IOB-1 or IOB-3 board connected
3
WRONG IOB:
AITAC
Only IOB-2 board connected,
CONV MODE = 1 or 2 and IOB-3 is not connected
CONV MODE = 3 and IOB-1 is not connected
AI1
Only IOB-2 board connected
AI2
Only IOB-2 board connected
CONV MODE = 3,4,5,6 and IOB-3 is not connected
CONV MODE = 7 and IOB-1 is not connected
AI3
Only IOB-2 board connected
CONV MODE = 3,4,5,6 and IOB-3 is not connected
AI4
Only IOB-2 board connected
CONV MODE = 3 and IOB-1 is not connected
4
LOW VAL.>HIGH VAL.
Low value > high value
5
NO IOE 1
Extension board not connected
EXAMPLE:
Rescaling, if reference is
different to +/- 10V
A speed reference 0 ... +/- 8V is connected to analog input AI1:
-
0V = corresponds to zero speed
-
+/- 8V corresponds to max speed
The speed loop at the control program is scaled to 20000 equal to
top speed. The value in rpm, the program uses is specified at pa-
rameter SPEED_SCALING (2103).
Parameters have to be set:
CONV MODE (104)
= 1
(voltage signal)
HIGH VALUE (105)
= 25000
(see below)
LOW VALUE (106)
= -25000
(see below)
If the reference is +4V, the speed reference value at output of the
AI1 block (10104) is 10000.
general:
20000
.
max
10
10
•
=
UHIHUHQFH
9
[
3
-
don´t forget the sign!
-
reference values higher than 10V can not be rescaled by the
converter; the rescaling has to be done outside the converter
-
references below 6,25V cannot be rescaled, because of the
high limit of the scaling parameters
Содержание DCS 500B
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