1. For indicators on the communications module, see chapter 9.
LED
Fault
Possible cause Action
NS
Flashes red
Communications
interrupted due to
timeout.
Bus problem
■ Check communication.
■ Synchronise the module.
Illuminates red Connection error.
MS
Flashes red
Recoverable er‐
ror.
■ Synchronise the module.
Illuminates red Unrecoverable er‐
ror.
Defective mod‐
ule.
■ Contact an authorised service
partner.
■ Install a new module.
MS illuminates green and
NS flashes green
Module connec‐
ted to bus, no
communication
(software).
Master deacti‐
vated.
Activate master
Slave address
in module in‐
correct.
Set the slave address in the
SIGMA CONTROL 2 as parametr‐
ised in the bus master. For setting,
MS illuminates or flashes
green and NS is extin‐
guished
Module connec‐
ted to bus, no
communication
(hardware).
Bus connec‐
tion interrupted
No supply volt‐
age to bus.
■ Check bus lines and plug.
■ Check bus supply voltage.
Tab. 107 Fault indicators in the DeviceNet communications module
2. Indicators in the menu
<Communication – Com-Module>.
In the menu 8.2
<Communication – Com-Module>, communications errors are displayed as
text under the line
Status or as a number after the word Error.
No. Fault text
Possible cause
Action
1
COM Module fault
Defective module.
Contact an authorised service partner.
2
Communication
error
Bus coupling via com‐
munications module in‐
terrupted.
Check bus lines and plug.
Slave address in module
incorrect.
Set the slave address in the
SIGMA CONTROL 2 as parametrised in the
bus master. For setting, see chapter 8.
3
Internal software
error
Defective module.
Contact an authorised service partner.
4
COM Module
deactivated
Module not activated.
Initiate communication, see chapter 8.
5
COM Module not
identified
No KAESER communi‐
cations module.
Only use a genuine KAESER communica‐
tions module.
90 Error Bus
monitoring
Bus master does not re‐
turn the toggle bit within
the monitoring interval.
■ Check bus master software.
■ Check the timeout interval, see chapter 8.
■ Deactivate monitoring if activated inad‐
vertently. See chapter 8.
Tab. 108 Fault indicators in the Communication – Com-Module menu
10 Fault Recognition and Rectification
10.7 Communication modules
No.: 901700 14 E
Service Manual Controller
SIGMA CONTROL 2 BLOWER ≥ 4.0.X
171
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