14
5
A
SSEMBLY
,
COMMISSIONING
,
DIAGNOSIS OF ERRORS
5.3 Diagnosis of errors
Problem
Possible cause
no display
•
supply voltage OFF or improperly connected
all display segments are ON
•
short-time: self-test after having switched on
the supply voltage
•
sporadic: contact of supply voltage
connections not in perfect condition or
voltage fluctuates under the minimum value
keyboard reset not possible
•
locked (system parameter F26) and signal
Keylock active
input of preselection or other
programming not possible
•
programming lock(s) switched on (system
parameter F27 … F29) and signal
Keylock
active
counter does not count
•
counting input not connected properly or
bridged
•
earth connection counter – pulse generator
defective
•
incorrect level (npn/pnp, system param. F24)
•
contact/pulse generator does not switch
properly
•
max. counting frequency is exceeded
•
input
Reset, Hold or Inhibit activated
•
pulse or pause width too small
•
prescaler too small
counter does not count correctly
•
bounce/disturbing pulses, vibrations at the
encoder
•
incorrect prescaler
outputs without function
•
signal duration programmed "off" (system
parameter F5 or F6)
•
faulty relay
•
contacts welded because of overload
Error0
message
•
programming of prescaler < 0.0005
confirm error message with the store key
Error1
message
•
counted value limits exceeded (< -99 999,
> 999 999)
use keyboard reset to delete error message
