JOHNSON CONTROLS
194
FORM 150.67-NM2
ISSUE DATE: 01/31/2019
SECTION 10 – MAINTENANCE
The table below shows the minimum, maximum, and
default values.
TABLE 42 - MINIMUM, MAXIMUM AND DEFAULT VALUES
DESCRIPTION MINIMUM MAXIMUM DEFAULT
DE MODIFIER ADDRESS -1 41943 -1
DE MODIFIER OFFSET -1 99 -1
P1 BAUD RATE 1200 76800 4800
1200, 4800, 9600, 19200, 38400, 76800, AUTO SELECTABLE
P2 BAUD RATE 1200 57600 1200
1200, 4800, 9600, 19200, 38400, 57600 SELECTABLE
P1, P2 MANUAL Mac
ADDRESS
-1 127 -1
P1, P2 PARITY NONE IGNORE NONE
NONE, EVEN, ODD, IGNORE SELECTABLE
P1 PROTOCOL BACNET API BACNET
BACNET, API SELECTABLE
P2 PROTOCOL TERMINAL MODBUS CLIENT API
TERMINAL, MODBUS IO, MODBUS SERVER, API, MODBUS CLIENT SELECTABLE
P1, P2 STOP BITS 1 2 1
RESET REAL TIME ERROR NO YES NO
Chiller data that can be read and modified using spe-
cific Modbus Register Addresses; and the data asso-
ciated with the addresses, is outlined in the following
description:
Serial Communication Analog Value Data
This data can be read and modified using a BACnet
or Modbus network connection. The Modbus Register
Address for these points is 1025 + AV #.
AV
BACNET
NAME
ANALOG VALUE DESCRIPTION
1 REM_SETP
SETPOINT COOLING SETPOINT
(HP ONLY), 99 = AUTO
(40 °F - 70 °F)
2
SP_REM_
SP_S1
SYS 1 SETPOINT (SUCTION
PRESSURE CONTROL)
3 LOAD_LIMIT LOAD LIMIT STAGE (0, 1, 2)
4 REM_CR
COOLING RANGE (DAT MODE
ONLY)
5
SP_REM_
SP_S2
SYS 2 SETPOINT (SUCTION
PRESSURE CONTROL)
6
REM_SP_
HEAT
HEATING SETPOINT (HP ONLY)
99 = AUTO (95 °F - 122 °F)
7 HP_MODE
MODE (HP ONLY) (0 = PANEL, 1 =
COOLING, 2 = HEATING)
Serial Communication Binary Value Data
This data can be read and modified using a BACnet
or Modbus network connection. The Modbus Register
Address for these points is 1537 + BV #.
BV
BACNET
NAME
BINARY VALUE DESCRIPTION
1
START_
STOP
START / STOP COMMAND
2 SS_SYS1
SYS 1 START / STOP COMMAND
(SUCTION PRESSURE CON-
TROL)
3 SS_SYS2
SYS 2 START / STOP COMMAND
(SUCTION PRESSURE CON-
TROL)
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