This user manual introduces the Uni-Telway protocol of the Altivar 71 Modbus/Uni-Telway card.
This manual provides step‑by‑step instructions for installing the Uni‑Telway communication card on an Altivar 71 drive, including hardware receipt, switch coding for address selection, and wiring recommendations. It also describes the required safety precautions such as disconnecting power and waiting for DC bus discharge before servicing.
The document details communication configuration, supported services, and diagnostic procedures, with tables of switch positions for address coding and a list of service request codes for software setup. It references related Schneider‑Electric documentation for further guidance.
| Product type code | 16#18 |
|---|---|
| Subtype code | 16#71 |
| Address range | 1‑127 (binary‑coded) |
| Maximum read objects | 63 words |
| Maximum write objects | 60 words |
The address is binary‑coded using the switch bank; each switch position represents a bit, and the address can be changed only when the drive is turned off.
Supported services include identification, protocol version, mirror, read error counters, reset counters, read/write words, and read/write objects.