Device functions
Page 50
RES-5006
Version 1
If there is an error, the AL bit is set. The error number is displayed in the compact protocol instead of the actual
value in bit 0…3, in the expanded and complete protocol in the second word at bit position 8…11
(
section 8.6.14 "Error numbers" on page 31).
D.)
Output of the error number over actual value output 0…10 VDC (terminal 17+18):
As a temperature display is not required in case of malfunction, the actual value output is used to output
the error in case of alarm.
Offered for this purpose, within the 0…10 VDC range, are 13 voltage levels, each of which has one error number
assigned. (
section 8.19 "Error messages" on page 50).
For statuses that require AUTOCAL, or when the device configuration is not correct (error no. 8…12, or 104…106,
111…114, 211, 302, 303), the actual value output switches back and forth between the voltage value that corre-
sponds to the error and the end value (10 VDC, i.e 300 °C or 500 °C) with 1Hz. If the START signal is output
during these statuses, the voltage value no longer changes.
An alarm message can be reset by activating the RS bit or by switching the controller off and on.
Resetting the alarm message using the RS bit becomes effective only when the RS bit is deactivated.
Invalid alarm messages can occur when the controller is switched off due to the undefined operating status. This
must be considered in evaluating the higher-level controller (e.g. PLC) to avoid false alarms.
8.19
Error messages
Besides the error diagnosis coded in the protocol, the PROFIBUS diagnosis (expanded device diagnosis) can also
be accessed. The error numbers appear as plain text in the project design tool, as they are stored in the GSD file.
The following table shows the assignment of the output error numbers to the errors that occur. In addition, the
cause of the errors and the necessary measures to remedy them are described.
The simplified circuit diagram in section 8.20 "Error ranges and causes" on page 54 permits fast and efficient error
remedy.
The controller outputs 13 voltage levels for error diagnosis over the PROFIBUS interface and the actual value
output. Internally in the controller, the error messages are differentiated in even more detail. The 3-digit error num-
bers described in parentheses can be displayed with the ROPEX visualisation software (
interface for visualisation software ROPEXvisual
" on page 47). The error search can thus be performed even
more effectively.
Evaluation of the actual value output for detection of an error message - e.g. in the higher-order
controller - must be done with an adapted tolerance window to avoid incorrect evaluations. The tol-
erances of the actual value output must be observed (
section 10 "Technical data" on page 56).
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