Parameter Communication Address
‑12‑
1.4 Station Number Allocation
1.4.1 Station Number Settings
When AC drives are cascaded, Fd‑18 must be set.
Figure 1‑1 System cascading topology
Automatically Assigning Station Number
1. Set parameters Fd‑18 and Fd‑39 of each power supply unit as appropriate. By
default, Fd‑18 is set to 1 and Fd‑39 is set to 0 (auto mode).
Set Fd‑18 to the number of the current AC drive.
Set Fd‑39 to 0 to enable auto assignment of station numbers.
2. After the above setting, restart the AC drive.
3. Formula and diagram of algorithm for auto station number assignment:
Algorithm:
Station number of power supply unit = Fd‑18 x 16
Station number of drive unit = Number of current slot + (Fd‑18 – 1) x 16
Example:
If Fd‑18 is set to 1, the station number of drive unit 1 is 1 + (1 – 1) x 16, that is, 1.
Station number of slot 1 = 14 + (Fd‑18 – 1) x 16
Station number of slot 2 = 15 + (Fd‑18 – 1) x 16
Station number of slot 3 = 13 + (Fd‑18 – 1) x 16
You can refer to Fd‑93...Fd‑99 to view the station number of the device connected
to a slot.
The following figures show the current station numbers of devices 1 and 2.
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