Johnson Controls QUANTUM LX, Setup

Page: 97 / 140

QUANTUM™ LX COMPRESSOR CONTROL PANEL
COMMUNICATIONS SETUP
090.020-CS (JUNE 11)
Page 97
Frick®
Address
AB
Address
Modbus
Address
Read/
Write
Description of Data Value Codes
8910 N119:10 48911 W Remote – Start 1 = Start
See Note 1
8911 N119:11 48912 W Remote – Stop 1 = Stop
8912 N119:12 48913 W Remote - Load Slide Valve
0 = Turn off
1 – 15 = Load x seconds
8913 N119:13 48914 W Remote - Unload Slide Valve
0 = Turn off
1 – 15 = Unload x seconds
8914 N119:14 48915 W Remote - RDB Capacity 25, 50, 75, 100 (represents capacity %)
8915 N119:15 48916 W Remote - Compressor Mode
0 = Manual
1 = Auto
2 = Remote -- Communications
3 = Remote -- I/O
5 = Remote -- Sequencing
6 = Manual -- Browser
8916 N119:16 48917 W Remote - Capacity Mode
1 = Auto
2 = Remote -- Communications
3 = Remote -- I/O
4 = Remote -- 4-20ma
5 = Remote – Sequencing
6 = Manual -- Browser
8917 N119:17 48918 W Remote - Clear Alarms 1 = Clear Alarms
8918 N119:18 48919 W Remote - Clear Recycle Delay 1 = Clear Recycle Delay
8919 N119:19 48920 W Remote - Sequencing Mode
0 = Disable
1 = Enable
8920 N119:20 48921 W Remote - Communication Units
0 = C ° / PSIA
1 = Panel Units
See Note 2
8921 N119:21 48922 W Remote - Regulation Mode
0 = Regulation Mode 1
1 = Regulation Mode 2
2 = Regulation Mode 3
3 = Regulation Mode 4
See Note 3
8922 N119:22 48923 W Remote – Set Slide Valve Position 0 – 100% See Note 4
8923 N119:23 48924 W Remote – Set Drive Speed 0 – 100% See Note 5
8924 N119:24 48925 W Remote – Set Total Capacity 0 - 200 See Note 6
GENERAL NOTES:
Command Values need tenths fi eld added. For example, to
start the compressor, the table above states that 1 = Start.
However, being that one decimal place is assumed, a value of
10 actually needs to be sent.
SPECIFIC NOTES:
Note 1: The compressor must be in remote communications
to accept the start and stop commands that are sent through
serial communications, and the Capacity Mode must be in re-
mote communications to accept load and unload commands
that are sent.
Note 2: To read the proper Temperature/Pressure units, use
Frick® address 4566. To change (write to) the Temperature/
Pressure units, use Frick® address 8920.
Note 3: Mode must already be enabled.
Note 4: The value passed with this command is the position
(percentage) to which the control will attempt to set the Slide
Valve. The control will automatically load and/or unload the
Slide Valve until it is within a deadband (+/- 0.5%) of the target.
Conditions:
• the compressor must be running
• the Capacity Mode must be Remote Comms
• if the compressor is Variable Speed, the Slide
Valve will not go below the Variable Speed Mini-
mum Slide Valve setpoint
This command is reset by a Remote Load or Remote Unload
command
Note 5: The value passed with this command is the speed
(percentage) to which the control will attempt to set the Drive.
Conditions:
• the compressor must be Variable Speed
• the compressor must be running
• the Capacity Mode must be Remote Comms
• the Drive will not go below the Drive Speed Mini-
mum setpoint
This command is reset by a Remote Load or Remote Unload
command
Note 6: This command is actually a combination the previ-
ous two (Remote – Set Slide Valve Position and Remote – Set
Drive Speed), and is for the convenience of the PLC program-
mer. A value of X from 0 to 100 will set the Slide Valve Position
to X% and the Drive Speed to 0% (or the allowable minimum).
A value of X from 100 to 200 will set the Slide Valve to 100%
and the Drive Speed to (X – 100)%.
COMMANDS: