Maintenance Messages - Siemens SIMATIC ET 200SP HA Equipment Manual

Displays, alarms and messages

7.4 Maintenance messages

7.4 Maintenance messages
Overview
A maintenance event is generated every time a maintenance requirement is determined. 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.
Table 7-9 Maintenance messages of F-DI 16×24VDC HA
Maintenance message
Redundancy partner has
different hardware/firm‐
ware version
IO redundancy warning
Carrier module or memo‐
ry in carrier module de‐
fective
Terminal block (TB) or
memory in terminal
block defective
66
Error Assign‐ Meaning / Cause
code ment
120 Module The redundantly configured I/O
H
modules are not compatible.
121 Module Unable to correctly communi‐
H
cate with the partner module
154 Module A fault of the carrier module or
H
of the memory module on the
carrier module was detected
during operation.
155 Module A fault of the terminal block or
H
the memory chip on the termi‐
nal block was detected during
operation.
Remedy
Check the hardware version and firmware
version of the modules and replace modules
or perform a firmware update.
• Check/replace right module
• Check/replace left module
• Check/replace terminal block
See also system manual ET 200SP HA Distrib‐
uted I/O System, section "Communication er‐
rors", "I/O redundancy warning" (Mainte‐
nance event: Error code 121H)"
Replace carrier module
Replace carrier module
Equipment Manual, 08/2021, A5E45647528-AD
F-DI 16x24VDC HA