Resource Data Management PR0750-MOB Installation & User Manual page 11

Mercury 2 & Intuitive Mobile Controller User Guide
P-15 Probe 5 Select
P-16 Relay 3 mode
P-29 Probe 1 or Probe 3
Resistor
P-18 Service Interval Time
(Run Hours)
P-19 Switch Resistors
P-98 Lights Case Off
P-99 Load Shedding
P-30 Do Discharge Stop
Compressor A
P-31 Do Discharge Stop
Compressor B
P-32 Discharge Stop Value
P-33 Discharge Stop
Differential
P-34 Maximum Compressor
Run Time
P-35 Comp Stop Both
P-20 Alarm Delay
P-21 UT Alarm
P-22 OT Alarm
P-23 Log Probe Type
P-24 Slug Log Probe
P-25 Log Alarm Delay
P-26 Log UT Alarm
P-27 Log OT Alarm
P-28 Monitor OT Alarm
P-40 Defrost Mode
P-41 Defrost Start
P-42 Defrosts per Day
P-43 No Defrost Time
P-44 Def Terminate
P-45 Def Min Time
Warning
Ensure that all power is
switched off before
installing or maintaining
this product
Please Note
This input can be used as a defrost termination probe (default) or as a monitor probe with an OT alarm
level (P-28)
This changes the function of relay 3 from Lights (default) to an alarm relay. The alarm relay is energised
for no alarm. Use the NC and Common for "Loop make" on alarm or use the NO and Common for "Loop
break" on alarm.
Selects whether the switched resistor invokes either a Plant fault or an External Defrost.
Time (in 1000 x hours) before the service icon (Spanner icon) comes on. The Run Hours timer increments
based on the number of hours the controller has been powered up and running. Reset the spanner icon to
off by changing this parameter to 0 and then back to the desired service interval. This process also resets
the Run Hours value to 0. To view the current Run Time value refer to the I/O list.
Enables switched resistors to be used for Plant Faults, External Defrosts, Case Clean.
See : Switched Resistor Values
Used to place the controller into Case Off when its lighting timer is in the off state. When the lighting timer
is in the on state the controller follows its normal control operation. This feature is disabled if the set point
o
(P-01) is below 6 C. Please note that when the controller is in case off all alarms are inhibited and all
outputs are turned off. Therefore care must be taken when enabling this parameter.
 Off – Feature is not used and only the controller lights relay follows the lighting timer status.

On - Feature is in use and controller will be in Case Off whenever the lights timer is in the off
state.
 Unused – This selection has no effect and should not be used. Please select from either Off or
On. This feature operates in either Local, using controller RTC, or Remote, using Data Manager
GP timer channel, lighting applications.
 Off – Feature is not used
 Mode 1 – Case goes to "CO2 Load Shedding Case Off Mode"
Mode 2 – Goes to Case Clean Mode

See: Load Shedding
This enables the discharge stop on compressor A, if set to ON then the compressor will be disabled if the
discharge temperature is exceeded.
This enables the discharge stop on compressor B, if set to ON then the compressor will be disabled if the
discharge temperature is exceeded.
If a compressor discharge probe exceeds this value and P-30 and P-31 are set to ON then the relevant
compressor will be disabled.
This is the differential below the discharge stop value that the discharge probe temperature has to drop
before the compressor is enabled again.
This limits the running time of any compressor, once the compressor has exceeded this time period it will
be switched off for the period of the anti short cycle time (P-06)
If either compressor stops due to expiry of the Maximum Compressor Run Time then both compressors
will be disabled if P-35 is set to On.
Delay for the over and under-temperature alarms
Under temperature alarm set point. This alarm uses the control temperature.
Over temperature alarm set point. This alarm uses the air-off temperature.
Allows the user to set the logging probe mode: -

Off

Logging with no alarms

Logging with alarms
Applies a damping factor. This can be used to make a standard probe have the same temperature
response as a logging probe.
Delay for the Logging probe over and under-temperature alarms
Logging probe under temperature alarm set point
Logging probe over temperature alarm set point
Monitor probe over temperature alarm set point
Allows the user to set the defrost mode: -

Local (Uses the internal parameters P-41 and P-42)

Remote (Requires a defrost schedule in the front end)

External (uses a switched resistor in input 3 ). When this signal is present a defrost is initiated.
Note: - If the external defrost signal is not removed then the controller will defrost according to the "No
Defrost" time and a missed defrost alarm will be generated. See P-29 for external defrost signal setup.
When defrost mode is set to "Local", this is the start time for the 1
When defrost mode is set to "Local", this is the number of defrosts per day equally spaced from the start
time.
If the controller misses a defrost command for any reason, a defrost will initiate after this time has elapsed
from the last defrost. Normally set to 2 hours over the normal defrost interval period.
The defrost will terminate (defrost control relay off) when the temperature of the defrost termination probe
reaches this value, if a defrost probe is not fitted then the air off program will be used.
Minimum time that a defrost will use (Defrost can't terminate until this time has elapsed. If termination
temperature is reached during this period, the defrost control relay is turned off but the controller will not
start refrigerating until the end of the defrost min period)
Revision 1.1
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