MVI56E-FLN ♦ ControlLogix Platform
Diagnostics and Troubleshooting
FA Control Network Ethernet Communication Module
User Manual
ProSoft Technology, Inc.
Page 77 of 155
Link Status Byte
The FA-Link Status register (displayed on the Own Node Status menu) contains
the following information:
Bit
Message
Description
Value
0
*Node Status (1=Out-ring,
0=In-ring)
Indicates whether the node is in-ringed or out-
ringed
0x0001
1
*Communication Invalid
(1=Yes, 0=No)
0x0002
2
Always 0
0x0004
3
Always 0
0x0008
4
Upper Layer Error Signal
(1=Error)
Indicates that the updating of the existence
signal of the upper layer cannot be recognized
0x0010
5
Common Memory Valid
(1=Valid)
Indicates the cycle data is valid
0x0020
6
Common Memory Set
(1=Complete)
Indicates that the setting in the common
memory of the node is completed
0x0040
7
Address Overlap
(1=Error,0=No Error)
Indicates that there is a duplication in the
common memory among the nodes connected
to the network
0x0080
*Only reported to the processor and not network where these bits are always
clear.
Upper Layer Status Word
The Upper Layer Status can be set by the ControlLogix processor to the module.
Refer to Upper Layer Status Read Definition (page 110) for more information.
Bit
Message
Description
Value
0 to 11
Error Code (User Defined)
0x0001
12
reserved
0x1000
13
1=Warning, 0=No Warning
Bit 15 = 1
Bit 15 = 0
0x2000
The upper layer
program is running with
an error but both cyclic
data and message data
are guaranteed.
The upper layer
program is at a stop
with an error but both
cyclic data and
message data are
guaranteed.
14
1=Alarm, 0=No Alarm
Both cyclic data and
message data are not
guaranteed.
Both cyclic data and
message data are not
guaranteed.
0x4000
15
1=Run, 0=Stop
Run
Stop
0x8000
