ABB DCS 500B Description page 16

Functional Software description
Analog Input Error Codes
EXAMPLE:
Rescaling, if reference is
different to +/- 10V
8
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 Text
Code
0 NO FAULT
1 I < 4 mA
2 NO IOB-1/IOB-3
3 WRONG IOB:
AITAC
AI1
AI2
AI3
AI4
4 LOW VAL.>HIGH VAL.
5 NO IOE 1
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)
HIGH VALUE (105)
LOW VALUE (106)
If the reference is +4V, the speed reference value at output of the
AI1 block (10104) is 10000.
general:
10
3 [ =
10
UHIHUHQFH
max .
- 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
Description
No faults or CONV MODE = 0
CONV MODE = 2 and I < 4 mA
No IOB-1 or IOB-3 board connected
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
Only IOB-2 board connected
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
Only IOB-2 board connected
CONV MODE = 3,4,5,6 and IOB-3 is not connected
Only IOB-2 board connected
CONV MODE = 3 and IOB-1 is not connected
Low value > high value
Extension board not connected
= 1
= 25000
= -25000
9
•
20000
(voltage signal)
(see below)
(see below)
DCS 500 Software Description