3.2
Technology unit overview
BU 0500 GB
Subject to technical alterations
63
3.2.10 SK TU3-AS1, AS interface
The
A
ctuator-
S
ensor-
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 energy 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
.
Detailed information can be found in the operating instructions
BU 0090
, or contact the supplier of the
frequency inverter.
Device S/E
(red/green)
Module status/error
Status LEDs
AS- Int. PWR/FLT
(red/green)
Standard status display for AS interface slaves
OUT 1 … 2
(yellow)
Digital I/O LEDs
IN 1 ...
4 (yellow)
Status of the AS interface bits, which are received/transmitted
from the Master.
DI 1 ...
4 (yellow)
AS-i I/O LEDs
DO 1 ...
4 (yellow)
Status at digital input/output.
3.2.11 PotentiometerBox, SK TU3-POT
The frequency inverter can be controlled directly from the device using the
PotentiometerBox. No additional external components are required.
The motor can be started, stopped and the direction of rotation changed by
means of the buttons. The LEDs indicate the status of the inverter.
The required setpoint value of the frequency is adjusted with the
potentiometer after it has been enabled (green button).
If an inactive error of the frequency inverter is present (red LED flashing),
this can be acknowledged by pressing the STOP key
I/O key
START/STOP
(green/red)
To enable or block the output signal.
Potentiometer
0…100%
Sets the output frequency beween f
min
(P104) and f
max
(P105).
Red LED
off
No error
flashing
Inactive error
on
Active error
Green LED
off
Frequency inverter switched off, enabled with rotation
direction to the right
flashing 1: briefly on, longer period off
Frequency inverter switched off, enabled with rotation
direction to the left
flashing 2: briefly on, briefly off
Inverter switched on with direction of rotation to the left
on
Inverter switched on with direction of rotation to the right