User's Manual

System Operation
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Alarm Monitoring/Reset (Discrete I/O)
Anytime an alarm occurs, the Alarm Reset input will
reset the alarms and allow for processing of the next
step by automation, except for the following condi-
tions:
• Potlife Alarms cannot be reset by the Alarm Reset
input or through the EasyKey Alarm Reset
key. Only a Purge/Color Change or spraying the Pot-
life volume will reset a Potlife alarm. (See
Alarm_Potlife output information on page 50.)
• When Flow Control is turned on (see Configure
Screen 5 on page 31), the Flow_Rate_Alarm output
will be High when the instantaneous flow rate is
above or below the Flow Rate tolerance setting.
(High Flow or Low Flow will be the condition, indicat-
ing in the status bar of the EasyKey.) This output will
be High along with the Mix_Active output. The PLC
should monitor the amount of time this condition
exists and take action at a predetermined time. With
Flow Control there will be times (for example during
flow rate changes) where the general alarm as
described here will be High (typically momentarily).
The PLC must read this Alarm output (i.e. general
alarm), see if Mix_Active is still High, and if so, start
a timer. A typical example would be to ensure all
parts are sprayed within a specific flow rate range. A
maximum predetermined time would be set to allow
a Low or High flow condition to exist continuously.
• Shutdown or go to Standby after the flow rate alarm
time expires.
Job_Complete Input
Every time a momentary Job_Complete input is seen by
the ProMix 3KS, a job log will be recorded, logging the
A, B, and C meter volumes (cc) with a time and date
stamp. The volumes will then be reset to 0. (Volume
totals are accumulated since the last reset.)
NOTE: A Color Change accomplishes the same Job
Complete Reset functions. The Job_Complete input is
commonly used to record material usage for a specific
set of parts. These volumes are sprayed material vol-
umes.
For Applications with Dump Valves (for quick
purges/color changes at or near the gun):
ProMix 3KS has four specials that can each be turned
off and on twice throughout a color change sequence.
See Advanced Setup Screen 8 on page 38 or Recipe
Setup Screen 7 on page 42.
For example, a dump valve at a gun on a robot could be
opened at the appropriate times to facilitate fast color
changes. Another output could be used to automatically
drive an air-operated fluid regulator High during the
Purge or Color Change process.
NOTE: With integrated Flow Control, the flow control
regulator automatically is driven High. See Advanced
Setup Screen 5 on page 37 for specifics on setting up
these values. Each of the specials can be monitored, but
can only be controlled through the times entered within
the setup screens of the EasyKey or by managing the
proper registers on the network.
The following ProMix 3KS inputs should never be on
(High) at the same time:
•Mix_Start
• Purge_Start
• Color_Change_Start
The Recipe Bits (0-6) are always on at the same time.
The only time these bits are recognized is when the
Color_Change_Start input is High. The Recipe Bits
should be loaded and stay loaded for the current rec-
ipe. Do not change the Recipe Bits until a color change
is required again. Inconsistent results are possible if this
is not followed.