8300 | 8315 L&J Tankway Software Description |
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4.12 Gateway Block (GWBLK)
The Gateway Block point is used for compatibility with Modbus Master devices. Rather, the user configures a GWBLK to function as a
4.12.1Parameters
The database parameters used by the GWBLK point are listed and described below:
Configuration Parameters | Function |
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Tag | A Tag can contain 15 bytes of data and can include any printable |
| ASCII character. Tags can be used to identify points indicating the |
| use of the point such as “Modbus Slave” or “Register Value1.” The |
| default tag is set to “GWBLK.00” |
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Protocol | Protocol that the GWBLK point is used with. Valid values are |
| Modbus Slave |
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ComPort | Bit mask to enable address referencing. If a bit corresponding to |
| the com port, then address referencing is enabled for the channel. |
| The default is 0xFF (all COM ports) |
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DataMode | Integer HEX value that controls the data returned to a Modbus Host |
| 0: Use parameter values |
| 0x01: Convert to Integer |
| 0x02: Return 0xFF if the data is invalid. |
| 0x04: Convert to Integer using only the Scale |
| If the DataMode is 0x01, the PntRef data will be converted to an |
| integer using the Offset, Scale, ValueMin and ValueMax. If the |
| DataMode is 0x04, the Scale parameter is used to convert to an |
| integer. |
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Offset | Input range Offset used for scaling the output to an integer value |
| when DataMode=1. |
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Scale | Input range Scale used for scaling the output to an integer value. |
| When DataMode=1. |
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ValueMin | Ouptut range Offeet used for scaling the output to an integer value |
| when DataMode=1. |
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ValueMax | Output range Scale used for scaling the output to an integer value |
| when DataMode=1. |
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CommFailValue | Value to set all of the output registers to when there is a |
| communications or other failure. The CommFailValue works in |
| conjuction with the Filter values. If the PntStatus of the PntRef has |
| bits set that match the Filter, the reference value is declared invalid |
| and the output value will be set to the CommFailValue. This mode |
| is overridden by DataMode = 0x02. |
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