Siemens SIMATIC OpenPCS 7 - Page 62

ChangeMask
The "ChangeMask" parameter keeps track of where the message status was changed.
Parameter values of ChangeMask:
● OPC_CHANGE_ACTIVE_STATE
● OPC_CHANGE_ENABLE_STATE
● OPC_CHANGE_ACK_STATE
NewState
The "NewState" parameter indicates the message status after a change.
Parameter values of NewState:
● OPC_CONDITION_ACTIVE
● OPC_CONDITION_ENABLED
● OPC_CONDITION_ACKED
PCS 7 OS NewState ChangeState
Message came in OPC_CONDITION_ACTIVE
OPC_CONDITION_ENABLED
OPC_CHANGE_ACTIVE_STATE
Message went out with
acknowledgment
OPC_CONDITION_ACKED
OPC_CONDITION_ENABLED
OPC_CHANGE_ACTIVE_STATE
Message went out without
acknowledgment
OPC_CONDITION_ENABLED OPC_CHANGE_ACTIVE_STATE
Acknowledged messages
(message still pending)
OPC_CONDITION_ACTIVE
OPC_CONDITION_ACKED
OPC_CONDITION_ENABLED
OPC_CHANGE_ACK_STATE
Acknowledged messages
(message no longer
pending)
OPC_CONDITION_ACKED
OPC_CONDITION_ENABLED
OPC_CHANGE_ACK_STATE
Locked message - OPC_CHANGE_ENABLED_STAT
E
Unlocked message OPC_CONDITION_ENABLED OPC_CHANGE_ENABLED_STAT
E
Came in, acknowledged
message
OPC_CONDITION_ACTIVE
OPC_CONDITION_ACKED
OPC_CONDITION_ENABLED
OPC_CHANGE_ACTIVE_STATE
Came in, went out
message with
acknowledgment
OPC_CONDITION_ACKED
OPC_CONDITION_ENABLED
OPC_CHANGE_ACK_STATE
OpenPCS 7 interface
6.5 OPC Alarms and Events (OPC A&E)
OpenPCS 7
62 Function Manual, 05/2012, A5E02780178-02