ABB OMD800 - Page 39

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AUTOMATIC CONTROL UNIT, OMD800
AUTOMATIC CONTROL UNIT, OMD800
Function Description
No function Digital input disabled
Emergency stop Digital input to command changeover switch to position O in
case of emergency, overrides all other commands
Inhibit switching I to II Digital input to prevent switching from Line 1 to Line 2
Remote control to O Digital input to command changeover switch to position O in
AUTO mode
Remote control to I Digital input to command changeover switch to position I in
AUTO mode
Remote control to II Digital input to command changeover switch to position II in
AUTO mode
Inhibit remote control Digital input to inhibit all remote control commands
Generator alarm Digital input to indicate generator failure
Force commutation Digital input to force switching from primary to secondary line in
AUTO mode
External generator start Digital input to start generator externally
Status of secondary loads Digital input to connect feedback from secondary loads control
device
Manual back switching mode Digital input to prevent automatic switching to primary line
Remote reset Digital input to reset active alarm
Line Priority I Digital input to set priority to Line 1
Line Priority II Digital input to set priority to Line 2
External Alarm Digital input to indicate external alarm
Table 7.5 The available Functions for Digital Inputs 4-11
Digital Inputs 4-7, Function
Figure 7.26 Digital Input 4 – Contact Type, NO is the default
Digital Input 4
Function
Contact Type
1/2
A07138
DI4 Function
Remote Control to I
A07139
Cancel EditOK
Digital Input 4
Function
Contact Type
2/2
A07140
DI4 Contact Type
NO
A07141
Cancel EditOK
Figure 7.25 Digital Input 4 - Function, Remote Control to I is the default