Micromod MOD: 30ML Functions Data Base Reference - Manual (Page 33)

MOD 30ML Functions
DISPLAY INTERFACE BLOCK
2.3 DISPLAY INTERFACE BLOCK (DIF)
The Display Interface block is a repository for all instrument display related data and control.
Use this block to assign the following:
• an instrument device tag
• access and entry constraints (tune and configure passwords, access and entry timeouts)
• customize alarm/diagnostic presentation (flash/beep on/off and rates)
• power up display
• define the order in which user displays are selected by the tag key and/or
• specify an input for remote selection of user display
2.3.1 Display Interface Block Operation
The Display Interface block monitors the operation of the faceplate by checking faceplate
communications errors and keyboard response errors. The block is executed every 50
milliseconds and manages activities such as ramping, current access level, faceplate
response to process alarms and diagnostics and the display list.
Faceplate Response to Process Alarms and Diagnostics
This block is used to configure the Alarm LED flash rate, the display flashing and flash rate
and the audio indicator beeping and beep rate. The Alarm LED will always indicate, by
flashing, that an unacknowledged diagnostic or process alarm condition exists. If the Alarm
LED is ON but not flashing it indicates an active diagnostic or process alarm exists and is
acknowledged. If the Alarm LED is OFF there is no diagnostic or process alarm condition.
The Alarm LED flash rate, the display flashing and flash rate and the audio indicator beeping
and beep rate are determined by the OR'ing of their configurations. FAST rate will override
SLOW rate, Flash Display will override not flashing display and beeping will override not
beeping. For example; if the attributes are configured as follows, and there is an
unacknowledged diagnostic, an unacknowledged high priority process alarm and an
unacknowledged low priority process alarm present, the Alarm LED will be flashing at a
FAST rate, the display will be flashing at a SLOW rate and the beeper will be beeping at a
SLOW rate.
Flash Display on Diagnostic NO
Beep on Diagnostic NO
Diagnostic Flash/Beep Rate FAST
Flash Display on High Priority Process Alarm YES
Beep on High Priority Process Alarm NO
High Process Alarm Flash/Beep Rate SLOW
Flash Display on Low Priority Process Alarm NO
Beep on Low Priority Process Alarm YES
Low Process Alarm Flash/Beep Rate SLOW
There is a silence feature which keeps the display from flashing and the beeper from beeping
while you are viewing the alarms and for one minute after you quit viewing alarms. To keep
re-arming this feature, press the ALARM key and then press the key labeled RET (R/L).
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