ABB AC 31 Technical Manual page 139

Page 5-30
Programming
When the push button is not pressed during 10 seconds, the configuration mode is closed and
the display value mode is again active
The configuration is stored in an internal EEPROM and it is saved in case of power fail.
This configuration can also be set by the user program.
G G G G Configuration by the user program
It is possible to configure the type of each channel by the user program with the function
blocks CONFIO1, CONFIO4 or CONFIO8. If the analog extension is removed, then its
configuration can be load again to the new one.
The type of the channel is written in the TYPE parameter:
TYPE = 0
1
2
3
4
5
6
14
15
It is also possible to lock the configuration. The lock function means that the configuration can
not be modified with the push button. The locked function is never stored and has to be sent
every time that the extension is supplied.
The display value is calculated according to the formula:
DISPLAY = (ANALOG value * MULT) / 32767 + OFFS
The position of the dot can also be set.
For example:
ANALOG value is 8000 (2V in voltage configuration)
MULT =100
OFFS= 25
DOT=1
DISPLAY = (8000 * 100) / 32767 + 25 =49
The display value is
The latest configured channel on one extension is always the channel number displayed. It is
possible to select a channel number to the display from the user program.
+/- 10V configuration
0-20 mA configuration
4-20 mA configuration
Pt100 configuration
Pt1000 configuration
Pt100 3 wires configuration
Pt1000 3 wires configuration
the configuration is unlocked (all channels)
the configuration is locked (all channels)
4.9
ABB Control - AC 31
1SBC 260400 R1001-b 06.99