Modbus Plus X-Link Driver User’s Guide
3.1 Configuration Parameters
The Modbus Plus driver is distributed in the file SA85.DRV. Once the SA85.DRV is loaded into the
Card Segment | The memory address for the SA85 card. The card requires 2K |
| of memory in the range of C000 to EF80. Default is D000, |
| second choice is D800. |
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Convert Floats | With this option is on, the Modbus Plus Driver will convert the |
| data types between the integer supported by the Modbus Plus, |
| and floating points stored in the |
| be expanded to floats; the floats written to the Modbus Plus will |
| be truncated. When this option is off, the floating points will be |
| read and written as two consecutive integers. Default option is |
| Off. |
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Poll Rate | Because the driver does not use interrupt settings, it must |
| access data from the card at a certain rate. The poll rate ranges |
| from 2 ms to 255 ms with a default of 10 ms. |
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The memory address selected must match the switch settings on the SA85. The memory base address switches are located near the bus connector on the SA85 and are not accessible from the outside of the
The Modbus Plus node address must also be set on the SA85. The switches to set the station address are accessible from the end of the
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