8. Modbus protocol
8. 10. Read Device Identification (43 = 16#2B)
Request:
Slave no. | 2B | Type of MEI | ReadDeviceId | Object Id |
| CRC16 | |
0E | 01 | 00 | Lo |
| Hi | ||
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1 byte | 1 byte | 1 byte | 1 byte | 1 byte |
| 2 bytes | |
Response: |
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Slave no. | 2B | Type of MEI | ReadDeviceId | Degree of conformity | |
0E | 01 | 02 | |||
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1 byte | 1 byte | 1 byte | 1 byte | 1 byte |
Number of additional frames |
| Next object Id |
| Number of objects | ||||
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| 00 |
| 00 |
| 04 | ||
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| 1 byte | 1 byte | 1 byte | ||||
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Id of object no. 1 |
| Length of object no. 1 | Value of object no. 1 | |||||
| 00+ |
| 0D | “Telemecanique” |
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| 1 byte |
| 1 byte | 13 bytes |
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Id of object no. 2 | Length of object no. 2 | Value of object no. 2 |
01 | 0B | “ATV71HU15M3” |
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1 byte | 1 byte | 11 bytes |
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Id of object no. 3 | Length of object no. 3 | Value of object no. 3 |
02 | 04 | “0201” |
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1 byte | 1 byte | 4 bytes |
Id of object no. 4 |
| Length of object no. 4 | Value of object no. 4 | ||||
| 06 |
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| 09 | “MACHINE 4” |
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| 1 byte |
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| 1 byte | 9 bytes | ||
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CRC16 |
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| 1 byte | 1 byte |
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The total response size given in this example equals 55 bytes.
The response contains the following four objects:
•Object no. 1: Manufacturer name (always "Telemecanique", i.e., 13 bytes).
•Object no. 2: Device catalog number (ASCII string; for example: “ATV71HU15M3”, i.e., 11 bytes).
The length of this object varies according to drive type. Use the “Length of object no. 2” field to determine the length.
•Object no. 3: Device version, in "MMmm" format where "MM" represents the determinant and "mm" the subdeterminant
•Object no. 4: Device name (ASCII string; for example: "MACHINE 4", i.e., 9 bytes).
The length of this object varies according to the device name assigned to the drive (the latter being configured by the user): [7. DISPLAY CONFIG.] menu, [7.1 USER PARAMETERS] submenu, [DEVICE NAME] parameter.
This menu can only be accessed in Expert mode. Maximum size 16 bytes.
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