Pass-through Query (Service Code = 0x4F)
Pass-through Query is outlined below.
Offset | Field | Value | Definition |
|---|---|---|---|
0 | Handle | 1-255 (1 byte) | Handle for Query |
Request Size = 1 byte
The HARTIOM responds with these messages.
Offset | Field | Value | Definition |
|---|---|---|---|
0 | Status | 00 = Success 34 = RUNNING 35 = DEAD | Query Status |
1 | HART Command | 0-255 (1 byte) | Echo of HART Command |
2 | HART CommStatus | (1 byte) | HART Reply Status Byte #1 |
3 | HART FieldDeviceStatus | (1 byte) | HART Reply Status Byte #2 |
4 | Data Size | 0-255 (1 byte) | Number of Data Bytes in Reply for HART Command |
5-257 | HART Reply Data … | Data Bytes Returned in Data Field of HART Reply to Requested Command |
Reply Size = 6-260 bytes
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