There is no device-dependent information to be supplied in the scan config point for the ModbusScanner, other than the name of the scan task -- ModbusScanner -- and its capability -- 0 = poll/PRBX only.
The following table reviews the contents of the scan tasks table attribute in the scan config point:
| Field Number | Field Name | DE Type | Possible Values | |
|---|---|---|---|---|
| Required | 0 | scan task name | rtBYTES16 | "ModbusScanner" |
| 1 | capability | rtUINT32 | 0=polled/PRBX | |
| Optional | . | |||
| . | ||||
| . |
|
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|---|---|---|---|---|---|
| AIN | Attribute Name | Type | DE Type | Possible Values | |
| Device Independent (required) | 0 | communication mode | scalar | rtLOGICAL | 0=polled/PRBX |
| 1 | device type | scalar | rtUINT8 | 0 to 255 | |
| 2 | control | scalar | rtLOGICAL | 0=disabled, 1=enabled | |
| 3 | status | scalar | rtUINT8 | §Communication Port Point | |
| 4 | retry count | scalar | rtUINT8 | 0 to 255 | |
| 5 | reply timeout | scalar | rtUINT16 | 0 to 65,535 | |
| 6 | poll types | table | |||
| 7 | PRBX types | table | |||
| 8 | CE overlap | scalar | rtLOGICAL | 0=disabled, 1=enabled | |
| 9 | msg queue status | scalar | rtUINT8 | 0, 1, or 2 | |
| Device Dependent (Modbus scan task specific) | 10 | comm info | table | (see below) | |
| 11 | rs232 info | table | (see below) | ||
| 12 | tranmission mode | scalar | rtUINT8 | 0=ASCII, 1=RTU | |
| 13 | max data length | scalar | rtUINT8 | 0 to 255 | |
| 14 | debug device | scalar | rtBYTES20 | (see below) | |
| 15 | socket | scalar | rtLOGICAL | (0=serial,1=TCP/IP) | |
| 16 | socket index | scalar | rtUINT8 | (see below) | |
| 17 | socket info | table | (see below) | ||
| 18 | current poll dev | scalar | rtBYTES20 | (see below) | |
| 19 | last good poll dev | scalar | rtBYTES20 | (see below) | |
| 20 | last good poll time | scalar | rtABS_TIME | (see below) | |
| 21 | process number | scalar | rtUINT8 | (see below) | |
| Optional | . | ||||
| . | |||||
| . | |||||
See also: