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Parameters/address space
5.4 Explanation of the module/channel parameters
Description
The I/O module has the following measuring ranges:
Measurement type
"deactivated"
"2‑wire"
"4‑wire"
HART mode is only possible with a measuring range of 4 to 20 mA. HART communication is not
deactivated even at currents below 4 mA.
Note
Response of the internal sensor supply with "2-wire" measurement type
After activation of the internal sensor supply (e.g. during module startup or after a short-circuit
of the sensor supply), the "Wire break" and "Low limit violated" diagnostic events are suppressed
for 3 seconds to avoid passivation of the channel involved in the ramp-up of the sensor.
During this time, the module provides the safe process value 0 on all channels.
5.4.11
Diagnostics HART
Definition
Enabling the diagnostics of the HART message frame specific monitoring and the status
information supplied by the connected field device in the HART message frame (HART device
status).
The parameter is only relevant when the "HART enabled" parameter is activated.
The HART diagnostics are reported as maintenance events.
Maintenance events (Page 72)
5.4.12
Diagnostics wire break
Definition
Enable the wire break detection. The module can only detect a wire break if this parameter is
activated.
32
Measuring range
Resolution with interference frequency suppression for 50
and 60 Hz
--
4 to 20 mA
0 to 20 mA
4 to 20 mA
--
16 bits including sign
F-AI 8xI 2-/4-wire HART HA
Equipment Manual, 09/2021, A5E50557845-AA
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