Maintenance Events; Address Space - Siemens SIMATIC ET 200SP HA Equipment Manual

Parameters, diagnostics messages and address space
A.5 Address space
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 have no direct effect on the function of the module or digital outputs.
Maintenance Error
message code
Redundancy 120
H
partner has dif‐
ferent hard‐
ware/firmware
version
IO redundancy 121
H
warning
Retentive mem‐ 154
H
ory in carrier
module defec‐
tive
Retentive mem‐ 155
H
ory in the termi‐
nal block defec‐
tive
A.5

Address space

Abbreviations
• "IB" stands for input byte, that is, the module start address in the input area
• "QB" stands for output byte, that is the module start address in the output area
• "DQ" stands for digital output
• "QDIn" stands for the value status (QI) of digital input n
42
Assign‐ Meaning / Cause
ment
Module The redundantly configured and interconnec‐
ted I/O modules are not compatible
Module Unable to correctly communicate with the part‐
ner module
Module Fault detected in the data block on the carrier
module during operation
Module An error of the memory block on the terminal
block was detected during operation
Remedy
Check the operating status and
firmware version of the modules
and replace modules or perform a
firmware update.
• Check/replace right-hand
module
• Check/replace left-hand mod‐
ule
• Check/replace terminal block
See also the "ET 200SP HA Distrib‐
uted I/O system system manual,
Chapter "Replacing an I/O module
at IO redundancy".
Replace carrier module
Replace terminal block
DQ 16x24VDC/0.5A
Equipment Manual, 10/2021, A5E39265993-AD