Booster Connection; System Monitoring/Alarm Output; Error Messages - Ropex RESISTRON RES-420 Operating Instructions Manual

10.21 Booster connection

The RES-420 controller has a connection for an
external switching amplifier (booster) as standard. This
connection (at terminals 1+2) is necessary for high pri-
mary currents (continuous
current > 25A). The switching amplifier should be con-
nected as described in section 8.7 "Wiring diagram with
booster connection" on page 17. No settings are
required in the menu.

10.22 System monitoring/alarm output

To increase operating safety and to avoid faulty heatse-
aling, the controller incorporates special hardware and
software features that facilitate selective fault detection
and diagnosis. Both the external wiring and the internal
system are monitored.
These features crucially support the system owner in
localizing the cause of an abnormal operating state.
A system fault is reported or differentiated by means of
the following elements.
A.) Error message on the display:
The cause of a fault can be localized quickly and easily
with the help of the error code that appears on the dis-
play. Please refer to section 10.24 "Fault areas and
causes" on page 44 for a list of the possible error
codes.
B.) Alarm relay (relay contact, terminals 5+6):
Page 40
current > 5A, pulsed
RES-420
This contact is set in the factory as follows:
• OPEN if error code 104...106, 111...113 or 211 is
displayed. The contact closes, however, if a
"START" signal is activated in this state.
• CLOSED if error code 101...103, 107, 108,
201...203, 801 or 9xx appears.
If the alarm relay is configured differently from the fac-
tory setting ( section 9.3.9 "Configuration of the alarm
relay" on page 22), these states are inverted.
An error message can only be reset by pres-
!
sing the "RESET" key or by switching the
controller off and then on again.
Invalid error messages may appear when the
!
controller is switched off owing to the unde-
fined operating state. This must be taken into
account when they are evaluated by the higher-
level controller (e.g. a PLC) in order to avoid false
alarms.

10.23 Error messages

The table below describes each fault and the required
corrective action. The block diagram in section 10.24
"Fault areas and causes" on page 44 permits each fault
to be cleared quickly and efficiently
The error codes described below can also be displayed
in the ROPEX visualization software ( section 10.20
"Diagnostic interface/visualization software (as of soft-
ware revision 100)" on page 39) to facilitate troubles-
hooting.
Controller functions