BEKA BA374NG, Руководство пользователя

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36
8. MAINTENANCE when configured as a Timer
8.1 Fault finding during commissioning
If a BA374NG fails to function as a Timer during
commissioning the following procedure should be
followed:
Symptom Cause Check:
No display No power
supply, or
incorrect wiring.
Note: Terminals
2, 6, 10 & RS2
are
interconnected
within the
instrument.
That there is
between 10 and
30V on
terminals 1 & 2
with terminal 1
positive.
Instrument
configuration
menu does not
correspond with
Timer section of
this manual.
BA374NG may
be configured
as a clock.
That
FunCtion
in configuration
menu is set to
ELAP5E
not to
CloC
.
Timer will not
start.
Timer not reset
Set time
5Et t
has not been
entered.
Reset timer via
external contact
or by operating
*
and
&
buttons
simultaneously
if the local total
reset
r5Et enbL
function has
been activated.
Enter time other
than zero for
5Et t'
.
Timer will not
respond to
sensor inputs.
Input A and/or
Input b
incorrectly
configured, or
sensor
incorrectly
connected.
Input A
and
input b
configuration
and that input
energising link
is correctly fitted
for selected
sensor.
Control
output(s) do not
function.
Control outputs
have not been
enabled.
Enable Control
Output(s) in the
configuration
menu.
Unable to enter
configuration
menu.
Incorrect
security code
That the correct
security code is
being used.
Contact BEKA if
the code is lost.
8.2 Fault finding after commissioning
EN 60079-17 Electrical installations inspection and
maintenance permits live maintenance in Zone 2 if a
risk analysis demonstrates that this does not
introduce an unacceptable risk. The removal of
covers [opening of Ex n instrument enclosure] is
permitted if this can be done without contaminating
the interior of the instrument with dust or moisture.
Some end-users may prefer not to permit live
maintenance to minimise risk.
ENSURE PLANT SAFETY BEFORE
STARTING MAINTENANCE
Live maintenance within the hazardous area
should only be performed when it is
permitted by risk analysis, or when there is
no risk of a flammable atmosphere being
present.
Symptom Cause Check:
No display No power
supply
That there is
between 10 and
30V on
terminals 1 & 2
with terminal 1
positive.
Timer will not
start.
Timer not reset Reset timer via
external contact
or by operating
*
and
&
buttons
simultaneously if
local total reset
rE5Et . EnbL
has
been activated.
Control
output(s) do not
function.
Control Outputs
have not been
enabled.
Enable Control
Output(s) in the
configuration
menu.
Unable to enter
configuration
menu.
Incorrect
security code
That the correct
security code is
being used.
Contact BEKA if
code is lost.
If this procedure does not reveal the cause of the
fault, it is recommended that the instrument is
replaced.
Note:
If configuration changes are made to any of
the following functions the Timer will be
forced into a fail safe idle condition. This
stops the Timer in the state it achieves when
it has timed-up to
5et t
or timed-down to
0000
. The Timer must be reset before it can
be restarted.
Input A
,
Input b
,
5tart5top
,
cycle5
,
up or dn
,
op1
and
op2
.