14 - 10 VM600 MPS hardware manual (standard version) MAMPS-HW/E
Edition 17 - February 2018
Detecting problems in the VM600 MPS rack
MAINTENANCE AND TROUBLESHOOTING
14.6.2.6 AMC8 card
(1) Before replacing a card
Where possible, various MPS system parameters and other information should be read
before replacing the AMC8 card. We recommend sending the following information to your
Meggitt Sensing Systems representative in order to help the diagnosis of any problems:
• Output states
• The system status
• The system identification
• Status of latched data.
This should be done using the VM600 MPSx software (MPS1 is shown in Figure 14-3). Select
the card in question (for example, slot 12) and use the following menu bar commands to
capture the information:
Communications > From AMC > Read Outputs
Communications > From AMC > Read System Status
Communications > From AMC > Read System Identification
Communications > From AMC > Read Status Latch Data.
It is important to capture all of this information, because some of it can disappear once the
AMC8 card has been removed from the rack. Note that some information found in
Read System Status is coded in hexadecimal and should be recorded as such.
If an intermittent problem is seen, it is recommended to:
1- Read the registers using the Communications > From AMC > Read Status Latch
Data command and record the values
2- Clear the registers using the Communications > To AMC > Clear Status Latch Data
command
3- Leave the system running for some time.
4- Read the registers using the Communications > From AMC > Read Status Latch
Data command and compare the values obtained with the values recorded in step 1.
The same values and errors should be found if the problem is reproducible.
Figure 14-3: VM600 MPS software menu bar commands used to obtain
AMC8 card information
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