Temperature transmitter iTEMP TMT82 Use in safety instrumented systems
Endress+Hauser 17
5.1.5 Alarm and warning messages
Additional information is provided by the alarm and warning messages in the form of
error codes and associated plain text messages.
NOTICE
When SIL locking is active on the device, additional diagnostics are activated, e.g. the
output current that is read back is compared against the rated value. If one of these
diagnostics results in an error message (e.g. F261 electronics module), a failure
current is output.
‣
In this case, briefly disconnect the device from the power supply, e.g. by unplugging the
terminals.
‣
When the device is subsequently restarted, a self-check is carried out. The error
message is reset.
‣
The relevant sensor input for these diagnostic events can be identified with the Actual
diag. channel parameter or on the optional plug-in display.
5.2 Device configuration for safety-related applications
5.2.1 Configuration methods
When the devices are used in safety instrumented systems, the device configuration must
meet two requirements:
• Confirmation concept:
Proven, independent testing of safety-related parameters entered.
• Locking concept:
Locking of the device following parameter configuration (as per IEC 61511-1 section
11.6.4).
To activate the SIL mode, the device must run through an operating sequence, during
which it can be operated in the operating/configuration tool (e.g. FieldCare, DeviceCare,
Pactware, AMS, PDM, Field Communicator 375/475) for which device driver files (DD or
DTM) are available.
"Expert mode" (SIL mode activation = SiMA)
Here, the current transmitter settings are adopted for the SIL mode (for restrictions, see
"Parameters and default settings for the SIL mode" section → 22). This means that
defined or preconfigured settings can be used for the appropriate application.
A0053700
1 Device parameter configuration method: Expert mode
A detailed description is provided in the following sections. The expert mode can be
implemented exclusively via HART only in the case of SIL devices (order code 590:
"Additional approvals", option LA "SIL"). For this reason, only these devices can be used
for safety instrumented systems.
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