ON-LINE CONFIGURATION
OPERATION
B - 2
I-E96-202B
®
In some applications, MFP modules are remotely located pro-
hibiting the operator from viewing the front panel LEDs. In
these applications, use data from the second module status
byte message to determine the status of the module. This
appendix provides a procedure for on-line configuration that
shows both the state of LEDs seven and eight as well as the
contents of the second module status byte message (specifi-
cally bits seven, six, three and one) for each step of the proce-
dure. Refer to
for the MFP module faceplate location
of LEDs seven and eight.
The type of interface device used to connect the module bus or
Controlway to the Plant Loop or INFI-NET determines how the
module status is acquired. Using an operator interface station
console, acquire the status by selecting the module in the PCU
status display selected from the system status display. With an
engineering work station using the Bailey Controls Company
CAD/TEXT software package, select the problem report option.
Please note that this option does not continuously poll for
module status. It may be necessary to invoke this option multi-
ple times until the final module status condition arises for the
given step of the on-line configuration cycle. The Modify Mode
menu of the CAD/TEXT software package contains the prob-
lem report option.
Do not reset a primary MFP module before the LEDs or module
status byte of the backup MFP module indicates that it is avail-
able. Resetting the primary MFP module before verifying the
backup module is available could result in unpredictable mod-
ule operation or loss of output data.
Table
provides a legend of symbols necessary to fully
understand this section. Table
, Figure
, Table
Figure
illustrate the primary and backup cycles, respec-
tively. For clarity, the term backup MFP module will always
refer to the original backup MFP module and the term primary
MFP module will always refer to the original primary MFP mod-
ule. When the primary and backup roles are reversed for either
unit, their status is carefully noted.
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 7 and 8
In the following tables, LED 8 is
on top, LED 7 is on bottom
ON
OFF
✲
BLINKING
NOTE:
1. bit 7 = first time in execute (most significant bit (MSB))
x = position not important
bit 6 = backup MFP module status bad
1 = bit set
bit 3 = on-line configuration changes being made
0 = bit not set
bit 1 = NVRAM default configuration