Operating instructions

20
The soft start time SST is set at the same time. The also applies to the operating
mode VAR.
Depending on AN1 the soft start time has the following values:
AN [1°el] 30
0 120 140 160 180 200 220 260 300 400 600
33.7 =33.7 =41.2 =48.7 =56.2 =61.5 =64.5 =67.4 =70.5 =73.5
SST [ms]
7 7.5 8 9 10 11 12 12.5 13 13.5 14 Rev.
➜
4. External connections
4.1 Power supply for Thyro-A
Connecting the power supply is carried out as shown in the figures and TECHNICAL
DATA. With Thyro-A 2A a right rotational field in the power circuit is required.
Description LED’s Description
Frequency fault PULSE INHIBIT blinks Outside 47Hz to 63Hz when
switching on or Zero crossing
SYNC fault PULSE INHIBIT blinks outside permissible tolerance
range in operation
Temperature monitoring red LED blinks Temp. monitoring responded
(control board or control
section)
Flash values invalid 2 red LEDs Mains fault
Correction values invalid blink synchron
Undervoltage PULSE INHIBIT Mains fault
Pulse lock active PULSE INHIBIT Bridge X2: 1.2
opened
U limitation 2 red LEDs blink slowly, U limit value exceeded
alternatively
Tab. 2 Allocation of message register
With a solely ohmic resistance load the poti can be turned to the left limit stop, at
 30°el Thyro-A independently switches to a faster pulse operation with To = 5 peri-
ods without SST. In this configuration the terminal X2.7 can be used as an additional
digital “set point value” (24V d.c.). This also permits the controller to be driven by a
2-point controller.
3.3 Diagnosis / status indications
Faults can occur in the load circuit and in the controller itself or from the mains.
Diagnosis of unexpected operating behaviour is performed by LEDs on the front
panel of the control device.