15
Display Queue
34
15
211
When 34 is done, message 15 will be
displayed.
Display Queue
15
211
When 15 is done, message 211 will be
displayed.
Display Queue
211
EMPTY
Message 211 will continue to be displayed until a new message number is put
in the MTR
3.2 Alarm Messages
You can define up to 32 alarms. These can be defined either by 2 Words (16 bits) or 32 distinct bits.
Alarms can take up to 304 bytes of memory. Alarms have a hierarchical structure and are triggered
by bit ON status only.
Note: The host PLC has the entire responsibility for performing all acknowledges and clear functions.
It is suggested that the function keys on the MMI and their existing functions be used for these
purposes in conjunction with the PLC program.
If Alarms are defined wordwise, the unit reads the designated (2) alarm registers. The registers bits
are then parsed from 0 to 15 (Register 1) then 0 to 15 (Register 2). If Alarms are defined bitwise, MMI
reads the bits as a cluster or individually in order as specified by a list of designated bits. The first
logical 1 bit encountered is processed as an alarm. Its associated message is displayed and acted
upon. Further parsing action is inhibited until the alarm is cleared or an alarm of higher priority is
encountered in subsequent reads.
Note: If a bit is not assigned a message number then activating the bit suppresses all alarms after
that bit.
Alarms interrupt MTR operations. MTR operations resume when all alarms are cleared or inhibited.
Summary of Contents for MMI-1 Series
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