Siemens DI 16x24VDC HF, Equipment Manual

Page: 42 / 46

A.3 Diagnostics messages
Diagnostics alarms
A diagnostics message is generated for each diagnostics event and the DIAG LED on the
DI 16×24VDC HA flashes red or the MT LED lights up yellow.
In addition, channel-specific channel diagnostics are displayed through the corresponding
channel error/status LEDs.
The diagnostics messages can be read in the diagnostics buffer of the CPU, for example.
Diagnostic messages are assigned either channel-specific to an input or assigned as module
messages to all inputs. All channels are switched off for diagnostics messages that affect the
entire module. Only the corresponding digital input is affected by diagnostics messages, which
refer to individual channels.
Table A-1 Diagnostic messages, their meanings and remedy options
Diagnostics mes‐
sage Error
code Assignment Meaning Remedy
Wire break 6
H
Channel Impedance of encoder circuitry is too high Use another type of encoder or
wiring, for example, use con‐
ductors with a larger cross-sec‐
tion
Wire break between the module and sensor Connect the cable
Channel not connected (open)
• Disable diagnostics
• Connect encoder contacts
with a 15 kΩ to 18 kΩ re‐
sistor
1)
• Switch off wire break check
Parameter assign‐
ment error 10
H
Module • Parameter assignment does not match
the terminal block used
• Incorrect parameter assignment
• Correct the parameter as‐
signment
• Check terminal block
2)
Supply voltage
missing 11
H
Module Missing or insufficient supply voltage L+
• Check the supply voltage L
+ on the terminal block
• Check terminal block
Hardware interrupt
lost 16
H
Module Error is reported because the events occur
faster than they can be processed in the
system.
Channel/compo‐
nent temporarily
unavailable 1F
H
Module Firmware update is in progress or has been
canceled during the update.
The module does not read any process val‐
ues in this state.
• Restart the firmware up‐
date
• Wait for firmware update
Short-circuit/over‐
load at external en‐
coder supply 10E
H
Channel Short-circuit of the encoder supply to
ground Correction of the process wir‐
ing
Shutdown on but‐
ton activation 122
H
Module The output disable switch was activated. Pull module
Inconsistent param‐
eter assignment 123
H
Module Errors in the redundancy parameters sent
to the module Check the parameter assign‐
ment
Drivers, parameters, diagnostics messages and address space
A.3 Diagnostics messages
DI 16x24VDC HA
42
Equipment Manual, 10/2020, A5E39265608-AD