OPERATION
6
35
SMARTMAC 400
www.krohne.com
07/2022 - 4008875401 - MA SMARTMAC_400 R01 en
Error category
according to
NAMUR NE 107
Error group
Error message
Description
Action
Failure
Sensor
Device
malfunction
The field device sensor
reports device malfunction
(2nd status byte)
Check field device sensor
and replace it if necessary.
Access restriced
The field device reports the
command error: access
restricted
Check field device
configuration.
Device Busy
The field device sensor is
busy
Repeat your request.
General
command error
Report for all command
error not explicitly handled
Check field device .
HART
communication
failure
HART
®
communication
failed
Check field device and cable
connections and replace
field device necessary.
Loop 1 low alarm
current
Alarm current on loop 1 (
3.5 mA)
Check field device and
replace it if necessary.
Loop 1 high alarm
current
Alarm current on loop 1 (
20.5 mA)
Check field device and
replace it if necessary.
Current mon.
deviation high
Current monitoring max.
deviation time span reached
Check field device and
replace it if necessary.
Failure
Configuration
USP<645>: Temp
wrong unit
Process input for
temperature has wrong unit
code
Change configuration of
tertiary variable.
USP<645>: Cond
wrong unit
Process input for
conductivity has wrong unit
code
Change configuration of
primary variable.
Process
USP<645>: Temp
too high
Input temperature
> 100°C
Decrease process
temperature according to
USP<645> specification.
USP<645>: Temp
too low
Input temperature < 0°C
Increase process
temperature according to
USP<645> specification.
USP<645>: Cond
too high
Input conductivity
> 3.1 µS/cm
Decrease process
conductivity according to
USP<645> specification.
USP<645>: Cond
too low
Input conductivity
< 0.6 µS/cm
Increase process
conductivity according to
USP<645> specification.
USP<645>: Cond.
out of tolerance
Water quality / cond. out of
tolerance
Check process conditions.
Check function
Configuration
Loop current
fixed
The HART
®
device reports
loop current fixed (2nd
status byte)
Remove manual hold
function.