Feature implementation 6-11
Meridian SuperNode MSL-100 Intelligent Peripheral Equipment (IPE) Reference Manual MSL14
focused on processing work that is less time consuming and work that has
higher priority such as termination messages. Therefore, the IPE can have a
rapid recovery from the overload level to a stable condition by regaining its
data store.
Overload indicators
When an IPE goes into overload, it is very important to inform operating
company personnel about the current situation. If the peripheral has been
under-engineered, appropriate actions may be taken to reduce the work load
that is being presented to this overloaded IPE.
The overload indication is given in the three forms: MAP display, logs, and
operational measurements. Descriptions of these follow.
MAP display
The Query PM (QUERYPM) command with the Fault (FLT) option at the IPE
level of the MAP terminal displays a posted IPE with fault conditions caused
by an overload situation.
The figure that follows gives an example of the QUERY command with the
FLT option. For more information on the QUERYPM command at the IPE
level, see Chapter “Software maintenance and diagnostics". Refer also to the
Commands Reference Manual (NTP 297-1001-822).
Figure 4 Overload example of QUERYPM with FLT option
Logs
Because there is only one level of overload control for IPEs, the protection
may not be sufficient to prevent an IPE from running out of data store. If any
new messages from the host XPM or from the P-side of the IPE arrive during
IPE
0
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
CM
MS
IOD
NET
PM
CCS
LNS
TRKS
EXT
.
.
.
.
.
.
.
.
QUIT
POST_
TRNSL
TST_
BSY_
RTS_
OFFL_
LOADPM
DISP_
NEXT
QUERYPM
PM
IPE
IPE Host
03
0
Links_00S:
Card:
1 2
3
4
5 6
7
8
9 0 1
2
3
4
5
1
1
1
1
1
1
SysB
1
ManB
Offl
15
5
CBsy
2
0
ISTb
7
2
InSv
125
10
ISTb
CSide 1
0
6
1
2LTC
4
0
0
QUERYPM FLT
IPE Node Inservice Troubles exist
PM Overloaded
Time: nn : nn>QUERYPM FLT
