Burkert Type 8620 - Manual (Page 84)

mxCONTROL Type 8620
Page 84
14.1.5 Maximum Output Timer (MOT)
Some control modules contain a maximum output timer in order to detect whether the output(s)
has/have been failed
. If the module output emitted the maximum output longer than the adjustable
maximum output time an alarm “Out fails” is generated, the common alarm output is actuated and in
some of these modules the controller output(s) are overridden with 0 %.
The MOT time period
counter is reset to zero:
• in Manual Mode
• if an input / sensor error occurs
• if there is an interruption by flow switch or system switch
• if the MOT alarm vanishes
As long as the MOT alarms is active, the MOT time period counter is frozen. The MOT alarm stays
active also if there was a system switch/flow switch interruption.
The MOT alarm vanishes: • if the operator confirmed the alarm in the corresponding
module specific processdata menu (the confirmation screen is
a large screen)
• if the MOT is disabled in the configuration menu and the
specialist returned to the main menu
• if at least one of the parameters of the corresponding module
was changed in the parameter menu
• or if a new configuration or parameter file was downloaded or
a parameter was changed in the configuration menu
During active "ASL Pump Stop" the MOT time period counter is stopped, but not reset (valid in the
combination of module PH_ONLY_ACID or PH_ACID_CAUS with the "ASL Pump Stop" of a
connected module CORROSION_DISPLAY).
For further details - refer to the corresponding control module(s) description.