GB-7
GB
Faults
DANGER
Electric shocks can be fatal! Before working on
possible live components, ensure the unit is discon-
nected from the power supply.
Fault-clearance must only be undertaken by author-
ized, trained personnel.
▷ Faults may be cleared only using the measures
described below.
▷
If the PFA does not respond even though all faults
have been remedied: remove the unit and return
it to the manufacturer for inspection.
? Faults
! Cause
• Remedy
? The 7-segment display does not light up.
! Mains voltage is not applied.
• Check the wiring, apply mains voltage (see type
label).
? The display blinks and indicates
P
or
? A bus fault is indicated on the automation
system.
! The PROFIBUS DP data traffic has suffered a
fault.
! Bus cable interrupted.
• Check bus cable.
! Bus cable connections confused in the plug.
• Check the wiring.
! A and B cables confused.
• Check cables.
! Terminal resistors connected incorrectly.
• Switch on the terminal resistors on the first and
last station in the segment and switch them off
for all other stations.
! Incorrect PROFIBUS address set.
• Correct the address setting – switch the unit off
and then on again to save the address.
! Bus cables too long.
• Reduce cable length or baud rate – see page
5 (Commissioning).
▷
If the transfer rate is reduced, remember that
this will increase the signal running times to and
from the individual units.
! Poor shielding.
• The shield must be connected to the shield clips
in the PROFIBUS DP plugs in full and over a wide
area.
! Poor equipotential bond.
• The PROFIBUS DP shield should be connected
at all points to the same ground potential by
grounding the BGT. If necessary an equipotential
bond cable must be laid.
! If faults only occur sporadically in the PROFIBUS
DP system, and are mostly only indicated briefly
in the bus master, the terminal resistors, shield-
ing, cable lengths/routes, equipotential bond
and the use of interference-suppressed ignition
electrode plugs (1 kΩ) in particular should be
checked.
▷
Further notes on building PROFIBUS DP net-
works are set out in the instructions for the au-
tomation system or, for example, in the “Installa-
tion Guideline for PROFIBUS DP/FMS”, available
from the PUO (PROFIBUS User Organization).
? All the burners are constantly in operation,
regardless of data traffic.
! The PFA is set to manual mode.
• Switch the PFA to “normal operation”.
? The display indicates
.
! Profibus module fault.
• Remove the unit and return it to the manufacturer.
? The display indicates
30
,
31
,
34
,
80
,
89
,
94
,
95
,
96
,
97
,
98
or
99
.
! Internal faults.
• Remove the unit and return it to the manufacturer.
Technical data
BGT
Weight: 2.3 kg.
PFA
Front width 8 depth units = 40.6 mm.
Overall height 3 height units = 128.4 mm.
Ambient temperature: -20°C to +60°C.
4 digital inputs: 24 V DC, ± 10%, < 10 mA.
4 digital outputs for controlling small relays 24 V,
max. 250 mW (10 mA).
Mains voltage:
220/240 V AC, -15/+10%, 50/60 Hz,
110/120 V AC, -15/+10%, 50/60 Hz,
for grounded and ungrounded mains.
Weight: approx. 0.75 kg.
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