1706/05
In the default setting, TxPDO2 is transmitted when a change in the contents of the
status word takes place or the value of control effort changes. An inhibit time of 50
ms is effective. Without a change in the value, the TxPDO2 is transmitted at an
interval of 1000 ms (event time). The object status word corresponds to the product-
internal status word.
The TxPDO2 can be deactivated by setting bit 31 (MSB) of the COB-ID in 1801/1.
There is then no transmission of the TxPDO2 (see DS301).
The transmission type cannot be altered.
With a setting of the inhibit time of ≤ 20 ms, a minimum transmission interval of 20
ms is always complied with. This prevents the frequency inverter from continuousl
transmitting and thus blocking the bus if the actual value fluctuates (caused by control
functions).
he control effort mappin
parameter corresponds to the actual speed. Please
remember that control effort is stated in the unit RPM and is rescaled into the unit Hz
from the product-internal actual value. The set number of pole pairs (parameter
o.
of Pole Pairs
373, data set 1) is relevant.
8.2.2 Service data object SDO
Transmission and receipt of service data objects demands the exchange of at least
two data telegrams. Service data objects are messages of an arbitrary scope which
demand a confirmation by the recipient. This type of data is used, for example, for the
parameterization of the frequency inverter, as access to the ob
ject directory is made
possible. The reply entails the data segment and object control information. A
defective transmission is notified by an error telegram.
A server SDO has been implemented (Index 0x1200). The server SDO supports
Subindex 01 and 02.
Service data object
Index Subindex Meaning Value
1200 0 Number of entries (unsigned 8) 2
1 Server-Rx-SDO-ID (unsigned 32) 1536 + Node-Id
2 Server-Tx-SDO-ID (unsigned 32) 1408 + Node-Id
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