Maintenance Events - Siemens SIMATIC ET 200SP HA Equipment Manual

Diagnostics mes‐ Error
sage code
Retentive memory 154
in carrier module
defective
Retentive memory 155
in the terminal
block defective
1) 47 kΩ resistors can be used provided that the following supplementary conditions are complied with: Only singular structure
of the I/O modules (no IO redundancy); the process cables are shielded; no certification required according to the following
standards: NE21 or Power Station 6100-6-5
2) Only the terminal blocks (TB 45R ...) are suitable for use with I/O modules in IO redundancy.
A.4

Maintenance events

Maintenance events
A maintenance event is generated for each maintenance required identified. The MT LED lights
up on the module.
Maintenance messages do not have a direct influence on the functions of the module or digital
inputs.
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
DI 16x24VDC HA
Equipment Manual, 10/2020, A5E39265608-AD
Assignment
Module Fault detected in the memory block on the
H
carrier module during startup.
Module Fault detected in the memory block on the
H
terminal block during startup.
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 memory block on the
carrier module during operation.
Module Fault detected in the memory block on the
terminal block during operation.
Drivers, parameters, diagnostics messages and address space
Meaning
A.4 Maintenance events
Remedy
Replace carrier module
Replace terminal block
Remedy
Check the operating status and
firmware version of the mod‐
ules and replace modules or
perform a firmware update.
• Check/replace right-hand
module
• Check/replace left-hand
module
• Check/replace terminal
block
See also the "ET 200SP HA Dis‐
tributed I/O system" system
manual, Chapter "Replacing an
I/O module at IO redundancy".
Replace carrier module
Replace terminal block
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