Frick QUANTUM 3 Page 38 Setup Download

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S90-010 CS (APR 08) FRICK

QUANTUM™ COMPRESSOR CONTROL PANEL

Page 38 COMMUNICATIONS SETUP

YORK ISN DATA ACCESS

ISN Revision 7

The Quantum™ panels Com-2 serial port is connected to
a ISN’s RS-485 serial port that is configured for York Talk
communications. Wire the ISN’s –RX / -TX to the
Quantum™ P12 pin 1 (-RX / -TX) and wire the ISN’s +RX /
+TX to the Quantum™ P12 pin 2 (+RX / +TX). Check that
the ISN communication protocol has been selected from
the Panel Setup –

Change Communications

screen and

that the baud rate of Com-2 and the panel ID number
coincide with the setup of the ISN device. The Quantum™
ID number is used for the ISN Node number.

The data exchanged with the ISN is found on pages (P) in
feature (F) 54 of the ISN. All temperatures are in degree C
and all pressures are in PSIA. A mode such as Slide Valve
mode is sent as an integer value that represents the mode
it is in. For example, a zero (0) is sent if it is in manual, or
a 1 is sent if it is in automatic, or a 2 is sent if it is in
remote. When changing a setpoint, the setpoint range is
checked to see if the received value is an allowed setting.
If it is not allowed, the setting is not changed.

If the compressor is to be remotely controlled and the
settings being sent from the ISN are not wanted to be
used for control, then two digital bytes must be set to a
one (1) to tell the Quantum to ignore the control settings
being sent to it from the ISN. Sending a one (1) in the

Start/Stop Enable digital byte from the ISN will signal the
Quantum to ignore the Start/Stop digital value received
from the ISN. Sending a one (1) in the Change Setpoints
Enable digital byte from the ISN will signal the Quantum to
ignore the setpoint values received from the ISN.

If the compressor is to be remotely controlled from the ISN
settings, then the compressor must be in remote to accept
the start and stop commands that are sent through serial
communication and the Start/Stop Enable received from
the ISN must equal zero (0). To change a setpoint the

Change Setpoint Enable received from the ISN must equal
zero (0)

Note:

The Quantum can still communicate to an ISN

panel that has revision 6 software if the baud rate is set for
1200, 2400, or 4800.

Quantum™ Receiving from ISN:

4 byte Analogs A1-A4
4 x 1 byte Digitals D1-D4

P03

Analog 1

Capacity.Sp

Capacity setpoint for
the current capacity
Control

P04

Analog 2

Amps.Force_Unl.Sp

High Motor Amps
Force Unload
setpoint

P05

Analog 3

Amps.Stop_Load.Sp

High Motor Amps
Stop Load setpoint

P06

Analog 4

Spare

P07

Digital 1

Start Remote

Start/Stop

P08

Digital 2

Start/Stop Enable

0 = Enabled
1 = Disabled

P09

Digital 3

Change Setpoints
Enable

0 = Enabled
1 = Disabled

P10

Digital 4

Spare

Quantum™ Sending to ISN:

25 x 4 byte Analogs A01-A25
20 x 1 byte Digitals D01-D20
10 x 1 byte Codes (OC) OP CODE 01 - OP CODE 10
14 x 4 byte Analogs A26-A39
5 x 1 byte Digitals D21-D25
Total = 191 data bytes

Following is a listing of the Quantum™ data that is sent to the ISN and the resulting ISN address:

ISN Address

Description of Data

P11-A01 Suction

Temperature

P12-A02 Discharge

Temperature

P13-A03 Oil

Temperature

P14-A04

Oil Separator Temperature

P15-A05