Instruction Manual PROTECT-PSC
V 2.6R01 / 04.19
7-3
7.3
Disturbances/error messages
7.3.1
Error categories
The error messages are subdivided into 3 categories. The category of error can be
recognised by the states of the special flags V01 to V03.
Alarms
Alarms are signalised by a set flag V03. They are shown in the display of the CPU
module by the prefix “AL” before the error code. An alarm warning does not lead to
a functional impairment of the PROTECT-PSC. Safe operation is guaranteed even
with a permanent alarm. An alarm can only be recognised by the messages of the
display or by query of flag V03.
Slight errors
Slight errors are signalised by a set flag V02. They are shown in the display of the
CPU module by the prefix "ER" before the error code. Their occurrence usually
indicates incorrect settings, errors in the user program or errors in the cabling (e.g.
cable break or short circuit to ground). The PROTECT-PSC moves to the safe
state (all safe outputs are shut down). The user program continues to be executed
(interrogation of the inputs, monitoring by PROTECT-PSCsw) without the possibil-
ity to enable the Outputs. Leave the safe state is only possible by Power OFF/ ON
or be activating the Restart Button..
Serious errors
Serious errors are signalised by a set flag V01. They are shown in the display of
the CPU module by the prefix "ER" before the error code. These errors are usually
hardware errors. If an error of this kind occurs, the user program is immediately
interrupted. The controller moves to the safe state. Leave the safe state is only
possible by Power OFF/ ON or be activating the Restart Button
7.3.2
Error memory
When an error occurs, the error code, further additional information as well as the
time of the error are stored in a special error memory. This memory can be read
out using the PROTECT-PSCsw programming software.
Ring buffer
The error memory is designed as a ring buffer. The last 8 errors are saved. If all 8
entries are used and if a further error then occurs, the oldest entry is overwritten.
Existing entries are not deleted after the error has been eliminated. It is not
possible to manually delete the error messages
If there is no back-up battery, all errors are deleted following a Power OFF.
Summary of Contents for PROTECT-PSC
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Page 265: ...Annex 8 Instruction Manual PROTECT PSC V 2 6R01 04 19 8 5 8 3 EC Type Examination certificate ...
Page 266: ...Annex 8 Instruction Manual PROTECT PSC V 2 6R01 04 19 8 6 8 4 Declarations of conformity W ...
Page 267: ...Annex 8 Instruction Manual PROTECT PSC V 2 6R01 04 19 8 7 8 5 Index ...