ON-LINE CONFIGURATION
OPERATION
B - 2
I-E96-203C
Elsag Bailey
Process A utom ation
•
Management command system.
•
Engineering work station.
NOTE: Care must be exercised to avoid deleting blocks or adding
blocks in the middle of existing ones. (Refer to the notes at the end
of Step 2 in Table
In some user applications, MFP modules are remotely located
and the operator is unable to view the group B LEDs. In these
applications, the data from the second module status byte must
be used. This appendix provides an outline procedure for on-
line configuration, and shows both the state of LEDs seven and
eight as well as the contents of the second module status byte
(specifically bits seven, six, three and one). For each step of the
on-line configuration process, both the contents of the status
byte as well as the state of LEDs seven and eight (Fig.
) are
indicated in the margin.
The specific interface device determines how module status is
acquired. For example, using an operator interface station,
the status is polled by selecting the module in the PCU status
display selected from the system status display. With an
engineering work station using CAD/TEXT software, the
problem report option must be selected. This option does not
continuously poll for module status. The engineering work
station user may have to invoke it multiple times until the
final module status condition arises for the given step of the
on-line configuration cycle. The problem report option is
available in the
Modify Mode
menu of the CAD/TEXT soft-
ware.
Do not reset an MFP module before the LEDs or module sta-
tus byte indicate that the module is available. Resetting an
MFP module prematurely could result in unpredictable oper-
ation or loss of output data.
Table
shows the symbols used in this section. Table
and Figure
illustrate the backup cycle. Table
and
illustrate the primary cycle. For clarity, the term
Table B-1. Legend of Symbols
Description
Primary
Backup
Module address
n
n+1
Second module status byte
Bit
1
7 6 5 4 3 2 1 0
0 1 x x 0 x 0 x
Bit
1
7 6 5 4 3 2 1 0
1 0 x x 1 x 0 x
LEDs 8 and 7. In the following tables,
LED 8 is on top, LED 7 is on bottom.
z
ON
{
OFF
5
BLINKING
NOTE: x = don't care, 1 = bit set, 0 = bit not set.
1. bit 7 = first time in execute (most significant bit (MSB))
bit 6 = backup MFP module status bad
bit 3 = on-line configuration changes being made
bit 1 = NVRAM default configuration