Siemens SIMATIC ET 200SP HA Manual page 56

Drivers, parameters, diagnostics messages and address space
A.4 Diagnostics messages and maintenance events
Maintenance messages have no direct effect on the function of the module or the analog value
acquisition.
Table A-11 Maintenance messages, their meaning and possible remedies
Maintenance Error
message code
Redundancy part‐ 120
H
ner has different
hardware/firm‐
ware version
IO redundancy 121
H
warning
Retentive memo‐ 154
H
ry in carrier mod‐
ule defective
Retentive memo‐ 155
H
ry in the terminal
block defective
56
Assignment Meaning / Cause
Module The redundantly configured and intercon‐
nected I/O modules are not compatible
Module Unable to correctly communicate with the
partner module
Module Fault detected in the data block on the carri‐
er module during operation
Module An error in the memory module on the ter‐
minal block was recognized during operation
Analog input module AI 16xTC/8xRTD 2-/3-/4-wire HA (6DL1134-6JH00-0PH1)
Solution
● Check the module and
replace it
● Update the firmware
● Check the redundancy
connection
● Check the redundant
modules
● Check and replace terminal
block if necessary
Replace carrier module
Replace terminal block
Manual, 05/2017, A5E39408175-AA