Endress+Hauser ria45 - In Operation; Device Self-Diagnosis and Error Handling

RIA45 Commissioning
Endress+Hauser 35
Expert → Diagnostics → Simulation:
• Select the output to be simulated with the simulation value
• Select the relay to be simulated with the status
7.5 In operation
7.5.1 ‘+’ and ‘-’ quick pick keys
You can use the ‘+’ and ‘-’ quick pick keys to switch through all the active channels
(universal inputs and calculated values) in the display mode. The measured value or the
calculated value is then displayed for 5 seconds. The channel name pertaining to the value
displayed appears in the color section of the display. The maximum and minimum value
are offered for each active channel.
You can exit a menu at any time by pressing the ‘+’ and ‘-’ keys simultaneously. Any
changes made are rejected.
7.5.2 Min./max. memory
The device writes the highest and lowest values of the inputs and calculated values and
saves them cyclically every 15 minutes in the nonvolatile memory.
Display:
Select the corresponding channel using the ‘+’ and ‘-’ quick pick keys.
Reset the min. and max. values:
Reset in the setup: select the channel (Analog in 1/2, Calc value 1/2 ), ‘Reset min/max’,
min./max. values of the corresponding channel are reset.
A reset outside the setup (resetting without a user code) is only possible if this was
enabled for the channel in the setup (Allow reset, →  24). Press ‘E’ and select
‘Display’. All the channels for which resetting outside the setup is permitted are
displayed in succession. Select the corresponding channel and set to ‘Yes’. The
channel is reset.
7.5.3 Device self-diagnosis, failsafe mode and cable open circuit
detection/measuring range limits
The device monitors its inputs for a cable open circuit, as well as its own internal functions
by means of comprehensive monitoring mechanisms in the device software (e.g. cyclic
memory test).
If the self-diagnosis of the device detects an error, the device reacts as follows:
• Open collector output switches
• Red LED lights up
• Relay switches (if active and assigned as a fault/alarm relay)
• Display goes to the error mode → color of channel affected changes to red and an error is
displayed
• The unit switches automatically between the active channels and the error display