Installation guide

Warning
Please Note
The specifications of the product detailed on this
Set-Up Guide may change without notice. RDM
Ltd. shall not be liable for errors or for incidental
or consequential damages, directly and indirectly,
in connection with the furnishing, performance or
misuse of this product or document.
Ensure that all power is
switched off before
installing or maintaining
this product
Revision 2.7 Page 60 of 83
Mercury Plant Controller Installation Guide
Invert Relays
The operation of the relays can be inverted so that N/C contacts can be used for energisation. This can be done
from the configure screen on web page. Choose the relay(s) you wish to invert and set them to on. This process
can also be completed from the controller display. Navigate to the menu option rly and select the relay output you
wish to invert for example r-05 is relay output 5. Change from “0” to “1” to invert the relay so that the N/C contact is
in use.
Please note: This operation does not invert the Alarm relay. The alarm relay is energised when there are no alarms
present.
Sticky Fans
Sticky fan operation allows the user to turn the fans off in a way that keeps a number of fans running longer.
Example:
If in a Pack/Condenser configuration fans are mapped to relays 5, 6, 7, 8, 9, and 10; the following sequence will
apply if sticky fans (P450) is set to 2
Fan1
Fan2
Fan3
Fan4
Fan5
Fan6
On Sequence
1
st
2
nd
3
rd
4
th
5
th
6
th
Relay #
Relay 5
Relay 6
Relay 7
Relay 8
Relay 9
Relay 10
Off Sequence
6
th
5
th
1
st
2
nd
3
rd
4
th
USB Operation
The following operations can be performed using a memory-stick plugged into the USB port: -
1. Export event log U-01
2. Export logged data U-02
3. Save configuration U-03
4. Load configuration U-04
5. Upgrade the software U-05
The above requires the user to enter the USB menu via the display and press enter at the appropriate display
option.
For example to save the current configuration insert a USB Memory stick into one of the USB Host ports, go to the
USB software menu option, press enter, then the use the up key to scroll to U-03. Now press enter, the screen will
flash “USB” until the operation has completed.
The file is transferred to the memory-stick in .zip format. The USB memory stick must be formatted as FAT32.