32
3 System Operation
C1 Control element does not react on changes to continuous output of the FMS.
Measure continuous output in order to make sure, that the FMS is working correctly.
Check output circuit to the control element.
TIP:
It is recommended that the FMS output signal is simulated with current transmitter. This makes
it easy to locate the fault.
See also C2 and C4
C2 No current signal measurable on the continuous output, although a figure >0 appears on "con-
tinuous output value" display
Hardware probably defective
First change continuous additional cards
if fault persists, change processor card
if fault persists, change backplane
C4
Fault 371
The monitor output of the FMS constantly monitors the current flowing (terminals 47 and 49),
(only if set to "Internal Load"). A current must flow at all times if the monitor output is configured
to "Internal Load". If the output is not used, the terminals must be short-circuited.
Check wiring
(Maximum apparent ohmic resistance 600 Ω)
Short-circuit terminals directly
Reset fault
TIP:
If the current can no longer flow entirely via the negative input (terminal 49) because of an ex-
ternal earth connection, this fault will occur even though the output current is correct.
TIP:
If "internal load" is not used for a fault resistant application (p.ex. only indication) switch off
monitoring (P 764).
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