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7.3 MX18 SYSTEM CONTROLLER AUTO CHANGEOVER UNIT, CONTINUED
ALARM 7. Slave Selected Status.
An alarm ACTIVE is generated when the SLAVE Computer is selected as the system
controller. The alarm will CLEAR if the MASTER computer is selected as the system
controller. This alarm is activated by Automatic & Manual selection changeover.
ALARM 8. Not defined.
The MAX PROTOCOL commands that the MX18 will recognize and respond to, are listed
below. It will only listen to commands from the currently selected MASTER or SLAVE
Computer. Commands from the non-selected one will be ignored.
"Z"
When a warm reset is received the MX18 only re-initializes the alarm states. No other
action or indication is given.
"X"
When the poll request command is received the MX18 will immediately generate the poll
answer sequences. This is used to satisfy the subrack polling mode (if in use).
"R"
When an enabled pseudo alarm changes state a read command sequence is generated
to represent the new status of that specific alarm. The format is identical to that
generated by a RD400 alarm input module.
Rev. C
RESET command (RX/TX)
POLL command (RX/TX)
READ command (TX)
7.3-3
HMXMU001018
10/06
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