Siemens TC12 Installation, Commissioning And Maintenance Handbook page 64

2.4.8.4 Active tasks, RX/TX packets and time events, Key to Press 'A'
This screen, as its name suggests, shows the processes going on within the
Instation against time, each dot represents 400ths of a second and the screen
shows processes in any one second. For its full understanding a good working
knowledge of the Instation is required, however it is possible to see if one
particular task or time event is running more often than is normal or using up more
time than normal.
The graphical representation noted below are described as if viewing a
monochrome screen, however notes are made alongside to state what the colour
would be if a colour display were employed.
Meanings of the graphics
A dot . is a single 400th of a second time period
Inverse video blocks (brown) Indicate time events during which for example data is
output to TC8 OTUs. Digit above indicates time spent on event, should not
normally go above 5.
It should be within the following bounds
It can be in yellow area
It should be in the red or green area as shown below
If it goes into the blue area it will be rejected and not acted upon.
17 dots
3rd line .................| Start of yellow area........
4th line ...continuation of yellow area
Characters 0 to C indicates task with the following significance
C= 1 second timer update task, not normally visible.
B= High priority message received from the host UTC TCC ready for
A= Input from IMD usually reply data and process ready to transmit as
a packet back to host UTC TCC.
9= Message ready received across Ethernet from host/UTC TCC.
8= Not Used
666/HE/43100/000
TC12 Installation, Commissioning & Maintenance Handbook
Indicates a packet received from the host UTC TCC via
the Ethernet, usually on bottom line of those displayed
and right hand corner.
Indicates a packet transmitted to the host UTC TCC
normally on top line of display
output
This is then distributed as necessary to High and Low priority
message tasks and configuration message task.
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8 dots 8 dots 10 dots
|........|........|.......... end of 4th line
RED | GREEN BLUE.
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