User Manual
Chapter 5
GFK-2849A
Oct 2019
Diagnostics
108
Devices Connected bit be checked first, before checking individual device connection status using
the Health status variables.
5.3.1
IED Connection Status
The communication between an ECM850 and an IED can be verified using the Status
Variable of each IED. The IED device status variable (ConnectionState) gets automatically
created, when you add a new Master/port or Server Device. Th
is “ConnectionState” variable
provides the status of IED connection. Each device has an associated health status variable
which is available in PPV format as described below:
In the Variables tab of the Navigator, expand the variable list of the intended target.
1.
Expand the UDT instance Sxx
1
_ IEDHealth and find the status variables listed for all
the IEDs configured for that ECM module.
2.
Check the status of each IED in the Watch window.
3.
The Status Variable is of type DWORD with a length of 32 bits. The bit description of
the status data is as shown below.
ConnectionState (or)
Sxx
1
_IEDHEALTH.nnn
2
_Sts
Primary Connection
Status
Redundant
Connection Status
TCP CONNECTED
0x0000 0002
0x0000 0020
TCP CONNECTING
0x0000 0004
0x0000 0040
TCP CONNECT FAILED
0x0000 0008
0x0000 0080
MMS
3
INITIALIZED
0x0001 0000
0x0100 0000
MMS RCB
4
ENABLE FAILED
0x0002 0000
0x0200 0000
1
xx - Slot number where the ECM850 resides
2
nnn - IED (IEC 61850 Server device) Name
3
MMS (Manufacturing Message Specification)
4
RCB (Report Control Block)
Example:
If an IED is connected and communicating in a Primary Connection the status value will be
16#0001 0002. If an IED is connected and communicating in a Redundant Connection the
status value will be 16#01000020.
This can be used by the application logic to take a corrective action or turn on an indicator if
a specific device fails. It might also be used by a custom HMI to show which IEC 61850 device
connections are currently established.
It is recommended that the
All Devices Connected
status bit be checked first in the “Module
Status” to determine wh
ether all devices belonging to the ECM850 are functioning. If this
bit is 0, indicating that one or more devices is not OK, the specific health status can then be
used to determine which specific devices are not communicating. For details on this status
bi
t, refer to “