System Tags

System Tags are diagnostic and control items in the Sub group _Attributes under each Device.

·      System Tags are identified by the keyword $SERVER as the Address Location

·      System Tags cannot be edited or modified.

·      Individual System Tags can be deleted as well as the entire _Attributes subgroup.

·      System Tags can be created by selecting Add Attribute Tags under the Device | Properties menu

 

System Tag Name

Data Type

Comment

_DeviceTimeout

VT_I2

READ / WRITE – OPC client application can change device timeout. Also See: Add Device

_DeviceType

VT_BSTR

READ ONLY – OPC client application can read type of class of Omron PLC OPC Server is connected to.

_DriverName

VT_BSTR

READ / WRITE – OPC client application can Hot Swap the communication driver used by the device. The DriverName must match a the name of a configured driver: Also See: Add Driver

_Enabled

VT_BOOL

READ/WRITE – OPC client application can enable or disable the Device from communication. Default = On/True

When the _Enabled item is Off / False, all OPC Items will report QUAL_BAD.

_ErrorCode

VT_I4

READ ONLY – OPC client application can retrieve the last error receive by the Device

_MessageCount

VT_I4

READ ONLY - This is a running count of communication messages both sent and received by the Device to the PLC.

_MessageErrors

VT_I4

READ ONLY – This is a running count of communication messages that were in error

_MessageRecv

VT_I4

READ ONLY – This is the running count of communication messages received from the PLC.

_MessageSent

VT_I4

READ ONLY - This is a running count of the communication messages sent to the PLC

_Node

VT_BSTR

READ / WRITE – OPC client application can Hot Swap to a different PLC by its Node.

HOSTLINK – Unit Number (0~31)

FINS ENET - < IPAddress|Network.NodeID >
Example: 192.11.11.38|0.38
Ethernet IP = 192.11.11.38, Network = 0,Node ID = 38

FINS SERIAL = <unit number | Network.NodeID >
Example: 0|2.1
Unit Number = 0, Network = 2, Node ID = 1

_ResetCounts

VT_BOOL

READ / WRITE – OPC client application can reset _MessageCount, _MessageErrors, _MessageSent, _MessageRecv to zero (0). Writing a True value to this item behaves as a one-shot.

_Simulate

VT_BOOL

READ / WRITE – OPC client application can Device to Simulation mode. Also See: Device Simulation