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Section VIII - Power$ync II
™
Operation
56 Quincy Compressor
®
- QSD™
Press F2 at the Compressor Diagnostic Menu to check the
operating status of the network:
NETWORK DIAGNOSTIC MENU 1
TALKING TO OTHERS: YES ERRORS: 0000
NETWORK AVERAGE PRESSURE: 110
UP FOR NEXT MENU/DOWN FOR PREVIOUS MENU
The network diagnostic menus have been designed
to aid in troubleshooting network problems that
may occur. These menus can be accessed before
starting the compressors to ensure that good
communications have been established between
all compressors on the network. If a problem
should occur after the compressors are operating,
their operating mode can be changed to Auto Dual
(to operate independently and maintain system
pressure) and the network diagnostics will
continue to function as long as the machines are
wired together.
TALKING TO OTHERS will show YES or NO. This
can be used to determine whether or not a
communications problem exists between machines.
NO will occur when the signal requesting
information from compressors on the network is
lost or scrambled. This might happen occasionally
in noisy environments. The control has been
designed to recover from these occasional
problems. If only one compressor is powered up,
this indication has no meaning. When Network
Diagnostic Menu 1 is entered, a snapshot of the
current communications is taken to determine if
this value is YES or NO and it will not change the
value until you press ENTER to exit this menu.
The most likely cause of a communication problem
is a poor cable or poor cable connections. The
next most likely cause is an incorrect setting on
the number 4 rocker of the S1 switch on the lower
right corner of the main circuit board (1A versions,
1B versions have a jumper). The last possible
source of this problem is an incorrectly wired
terminator box, or a terminator that is not plugged
into a 115 volt outlet.
ERRORS is the number of various errors detected
from other machines in the network. Each time
information is sent out on the network, the control
looks for an acknowledgement signal that the
information was received. The ERRORS number
indicates the number of times that no
acknowledgment was received. This number
should be zero, or very small. If the number is
increasing, there is a problem in the network.
The network controls the operation of machines
by comparing the average pressure reading to the
pressure band assigned to that compressor.
Individual machines have pressures different from
other compressors on the network. The
NETWORK AVERAGE PRESSURE display shows
the actual average pressure.
Press the UP arrow key at Network Diagnostic Menu 1 to
display to Network Diagnostic Menu 2.
NETWORK DIAGNOSTIC MENU 2
SCHEDULED SEQUENCE: ABCDEF
OPERATING SEQUENCE:_______
UP FOR NEXT MENU/DOWN FOR PREVIOUS MENU
This menu shows the sequence that is scheduled
to be operating at that particular time and the
sequence that is actually operating. These two
should be identical. If they are not, the network
needs to be resynchronized. This may occur if a
machine has been out of the network when network
sequence and schedule changes were made or if a
new machine is added to the network.
Press the UP arrow key at Network Diagnostic Menu 2 to
move to Network Diagnostic Menu 3.
NETWORK DIAGNOSTIC MENU 3
TO RESYNCHRONIZE THIS MACHINE
ON THE NETWORK ➔ PRESS F2
UP FOR NEXT MENU/DOWN FOR PREVIOUS MENU
Any time a machine has been powered down, it
will automatically resynchronize with the other
machines on the network as soon as power is
reapplied. If, however, there has been a
communication (cable) problem that was corrected
without powering down any of the machines on
the network, it is possible that the network
communications chip lost its synchronization with
the other networked machines. Press F2 to
resynchronize the communications between
machines without having to power down the
control.