TGP OPC Items

Owned by Michael Standal
Last updated: Jun 05, 2019
2 min read

Standard Items

See Device Standard Items.

Protocol Items

F.S.T.B (WO)[M]

  • F specifies the desired function code.
    • For TGP Standard devices the function code is between 0 and 1023.
    • For TGP SBC60 devices the function code is between 0 and 511.
  • S specifies the desired sub function code.
    • For TGP Standard Devices the sub function code is between 0 and 65535.
    • For TGP SBC60 devices the sub function code is between 0 and 255.
    • The default sub function code is 0.
  • T specifies the item type index.
    • An item type index of 0 represents data quality. 
    • An item type index of 1 represents a floating point data type.
    • An item type index of 2 represents a long data type.
    • An item type index of 5 represents a date string in the following format: YY/MM/DD, where YY represents the year, MM represents the month, and DD represents the day.
    • An item type index of 6 represents a time string in the following format: HH:MM:SS, where HH represents the hour, MM represents the minute, and SS represents the second.
    • An item type index of 8 represents a status data type.
    • The default item type index is 1
  • B specifies the bit designator (for use with item index type 8 only). 
    • The B bit designator is a value between 0 and 31.
    • Writes for item index type 8 must be performed as a DWORD.
    • The default bit designator is 32 (DWORD). 
  • If an item name has a (WO) to the right of the item name definition then the item will be a “Write Only” item. A “Write Only” item will not be polled from the field device.
  • If an item name has a [M] to the far right of the item name definition then the item will be flagged as a “Multi-function Code Write” item. When a “Multi-function Code Write” item is written to by the OPC Client, the TGP Protocol component will generate a write message to the item function code and a write message to the next consecutive function code. The sub function code and value of the subsequent function code will be identical to the first item. The “Multi- function Code Write” is not supported for item type index 8.
  • If an item name has a [RO] to the right of the item name definition, then the item will be Read Only.

Item Syntax Patterns

Item.Type.Index[M]

Item.Type.Index[WO]

Item.Type.Index[RO]

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