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Error Causes and Remedies
TR-Electronic GmbH 2018, All Rights Reserved
Printed in the Federal Republic of Germany
Page 108 of 111
TR - ELA - BA - DGB - 0029 - 00
08/29/2018
9 Error Causes and Remedies
9.1 Optical displays
The LED function is controlled by NMT State Machine transitions. LED allocation see
chapter “Bus status display” on page 78.
Error LED
Cause
Remedie
OFF
No error, node is in state
NMT_CS_OPERATIONAL
(NMT_CT7)
Normal operating state
If the node doesn’t receive any
SoC, PReq, PRes or SoA frame
during a definable timeout
intervall after entering the
NMT_CS_NOT_ACTIVE
state, the
node changes over to
NMT_CS_BASIC_ETHERNET
(NMT_CT3).
Timeout is defined in Object 1F99h:
NMT_CNBasicEthernetTimeout_U32.
Default value = 5 s. The informations indicated
there must be considered.
It was executed a hardware- or a
local software RESET. The node
is initialized and changes into the
state
NMT_GS_INITIALISING
(NMT_GT2).
According to the state machine the node must be
taken into operation again.
ON
Due to an internal error the node
was transferred into the state
“Error condition” (NMT_CT11).
Causes for this can be CRC
errors or Loss of frames.
- In order to locate the error, the reported Error
code in the StatusResponse frame must be
evaluated, see Error Codes on page 110.
Optionally the threshold must be adjusted in the
corresponding objects.
Due to an internal error the node
was transferred into the state
“Internal Communication Error”
(NMT_GT6). Causes for this can
be Tx/Rx buffer
underrun/overflow errors or
Collision errors.
- In order to locate the error, the reported Error
code in the StatusResponse frame must be
evaluated, see Error Codes on page 110.
Optionally the threshold must be adjusted in the
corresponding objects.
Link LED
Cause
Remedie
OFF
Voltage supply absent or too low
- Check voltage supply, wiring
- Is the voltage supply in the permissible range?
No bus connection
Check bus cable
Hardware error,
measuring system defective
Replace measuring system
FLASHING
Measuring system ready for
operation, connection to master
established, data transfer active.
-
ON
Measuring system ready for
operation, connection to master
established, no data transfer.
-