Siemens DI 16x24VDC HF, Equipment Manual

Page: 43 / 46

Diagnostics mes‐
sage Error
code Assignment Meaning Remedy
Retentive memory
in carrier module
defective 154
H
Module Fault detected in the memory block on the
carrier module during startup. Replace carrier module
Retentive memory
in the terminal
block defective 155
H
Module Fault detected in the memory block on the
terminal block during startup. Replace terminal block
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
message Error
code Assignment Meaning / Cause Remedy
Redundancy part‐
ner has different
hardware/firm‐
ware version 120
H
Module The redundantly configured and intercon‐
nected I/O modules are not compatible. Check the operating status and
firmware version of the mod‐
ules and replace modules or
perform a firmware update.
IO redundancy
warning 121
H
Module Unable to correctly communicate with the
partner module.
• 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".
Retentive memo‐
ry in carrier mod‐
ule defective 154
H
Module Fault detected in the memory block on the
carrier module during operation. Replace carrier module
Retentive memo‐
ry in the terminal
block defective 155
H
Module Fault detected in the memory block on the
terminal block during operation. Replace terminal block
Drivers, parameters, diagnostics messages and address space
A.4 Maintenance events
DI 16x24VDC HA
Equipment Manual, 10/2020, A5E39265608-AD
43