ALTUS Nexto Series User Manual

6. REDUNDANCY WITH NX3030 CPU
//Logic to put the local PLC in Inactive
IF var_Inactive_command_Ethernet_relation = TRUE THEN
DG_NX4010.tRedundancy.RedCmdLoc.bInactiveLocal:=TRUE;
var_Inactive_command_Ethernet_relation:=FALSE;
END_IF
IF var_Inactive_command_Serial_relation = TRUE THEN
DG_NX4010.tRedundancy.RedCmdLoc.bInactiveLocal:=TRUE;
var_Inactive_command_Serial_relation:=FALSE;
END_IF
//Logic to switch on the local PLC switched off by the PX2612
IF var_TurnOn_command_Ethernet_relation = TRUE THEN
DG_NX4010.tRedundancy.RedCmdLoc.bTurnOnLocal:=TRUE;
var_TurnOn_command_Ethernet_relation:=FALSE;
END_IF
IF var_Turn_command_Serial_relation = TRUE THEN
DG_NX4010.tRedundancy.RedCmdLoc.bTurnOnLocal:=TRUE;
var_Turn_command_Serial_relation:=FALSE;
END_IF
Above there’s an example in ST language, where the redundancy command can be executed through two variables from dif-
ferent communication ports. On the same example, three different commands were executed (StandBy, Inactive and TurnOn).
Where:
var_StandBy_command_Ethernet_relation: Bool type variable attributed to an Ethernet communication Coil which will
execute the command to put the local Half-Cluster in Stand-By.
var_StandBy_command_Serial_relation: Bool type variable attributed to a Serial communication Coil which will exe-
cute the command to put the local Half-Cluster in Stand-By.
DG_NX4010.tRedundancy.RedCmdLoc.bStandbyLocal: this command executes an action similar to the button STAND-
BY from the PX2612, in the local PLC.
var_Inactive_command_Ethernet_relation: Bool type variable attributed to an Ethernet communication Coil which will
execute the command to put the local Half-Cluster in Inactive.
var_Inactive_command_Serial_relation: Bool type variable attributed to a Serial communication Coil which will execute
the command to put the local Half-Cluster in Inactive.
DG_NX4010.tRedundancy.RedCmdLoc.bInactiveLocal: this command executes an action similar to the button INAC-
TIVE from the PX2612, in the local PLC.
var_TurnOn_command_Ethernet_relation: Bool type variable attributed to an Ethernet communication Coil which will
execute the command to reactivate the local Half-Cluster after switched off by the PX2612 relay.
var_Turn_command_Serial_relation: Bool type variable attributed to a Serial communication Coil which will execute
the command to reactivate the local Half-Cluster after switched off by the PX2612 relay.
DG_NX4010.tRedundancy.RedCmdLoc.bTurnOnLocal: this command executes an action similar to the button TURN
ON PLC from the PX2612, in the local PLC.
6.3.5. Diagnostics, Commands and User Data Structure
Each CPU has several data structure related to redundancy. The following structure is AT variables mapped over %Q
variables:
RedDgnLoc: has diagnostics from the CPU (local) related to the redundancy, as the CPU redundancy state, for instance
RedDgnRem: it’s a copy from the other CPU RedDgnLoc, received through NETA/NETB synchronism channels. This
way, this CPU (local) has access to the other CPU (remote) diagnostics
RedCmdLoc: has commands which must be applied on this CPU (when called Local) or on the other CPU (when called
Remote). E.g. the StandbyLocal field from this data structure corresponds to a command which must be executed in
this CPU (local), while the StandbyRemote field corresponds to a command which must be executed in the other CPU
(remote)
RedCmdRem: it’s a copy from the other CPU RedCmdLoc, received through NETA/NETB synchronism channels. This
way, this CPU (local) can execute commands received from the other CPU (remote)
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ALTUS Nexto Series Specifications

General

Brand	ALTUS
Model	Nexto Series
Category	Computer Hardware
Language	English