NORD Drivesystems BU0300 - Manual (Page 43)

3.2 Technology unit overview
BU 0300 EN Subject to technical alterations 43
3.2.7 InterBus module
(SK TU2-IBS, Part. No. 275130080)
(SK TU2-IBS-C, Part. No. 275170080)
With InterBus, up to 256 subscribers with different automation devices
can exchange data. PLC's, PC's, operating and monitoring devices can
all communicate via a uniform bus in serial bit mode.
NORDAC frequency inverters are remote bus participants. The data
width is variable (3 words; 5 words), at a baud rate of 500kBit/s
(optional 2Mbit/s). An additional termination resistor is not necessary
as it is already integrated. Addressing is carried out automatically by
means of the physical arrangement of the participants.
An external 24V supply is required for uninterrupted Bus operation.
NOTE: Detailed information can be found in the operating instructions BU 0070 or contact the supplier of the
frequency inverter.
3.2.8 AS interface
(SK TU2-AS1, Part. No. 275130120)
(SK TU2-AS1-C, Part. No. 275170120)
The Actuator-Sensor-interface (AS interface) is a bus system for the
simple field bus level. The transmission principle is a single master system
with cyclical polling. A maximum of 31 slaves (or 62 A/B slaves) can be
operated on an up to 100m long unshielded two-wire cable in any network
structure (tree/line/star). The AS interface cable (yellow) transmits data
and power while a second two-wire cable can be used for a small auxiliary
voltage (24V). Addressing is implemented via the master, which can also
provide other management functions, or via a separate addressing device. The 4 bit reference data (per
direction) are cyclically transmitted with an effective error protection at a maximum cycle time of 5ms.
Transmission of larger data volumes is also possible with some slave profiles (e.g. slave profile 7.4). The bus
system is defined in the AS Interface Complete Specification.
NOTE: Detailed information can be found in the operating instructions BU 0090 or contact the supplier of the
frequency inverter.
Module status LEDs
ST (red/green)
Module error/ready
InterBus status LEDs
UL (green)
Supply voltage applied.
RC (green)
Remote Check, remote bus to previous InterBus device is OK.
BA (green)
Bus Active, InterBus data are being exchanged (Bus running).
RD (yellow)
Remote bus disabled, remote bus to next InterBus device is
switched off.
TR (green)
Transmit, data is being transferred from/to participants.
Status LEDs
Device S/E (red/green) Module status/error.
AS- Int. PWR/FLT (red/green) Standard status display for AS interface slaves.