The following table outlines the device-dependent information you must provide for the Modbus protocol in the scan output table attribute.
| Field Number | Field Name | DE Type | Possible Values | |
|---|---|---|---|---|
| Device Independent | 0 | point control | rtLOGICAL | 0=disabled, 1=enabled |
| 1 | point status | rtUINT8 | §To configure the scan input table | |
| 2 | reserved1 | rtINT16 | ||
| Device Dependent (Modbus scan task specific) | 3 | register | rtUINT16 | (see below) |
| 4 | num elements | rtUINT16 | (see below) | |
| 5 | modbus function | rtUINT8 | (see below) | |
| 6 | modbus type | rtUINT8 | (see below) | |
| 7 | register count | rtUINT8 | (see below) | |
| 8 | reserved2 | rtUINT8 | (see below) | |
| Optional | . | |||
| . | ||||
| . |
See also: