JOHNSON CONTROLS
162
FORM 150.66-NM2
ISSUE DATE: 09/25/2020
SECTION 10 - MAINTENANCE
Chiller data that can be read and modified using specific Modbus Register Addresses; and the data associated 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
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 CONTROl)
3
SS_SyS2
SyS 2 START / STOP COMMAND (SUCTION PRESSURE CONTROl)
SERIAL COMMUNICATION ANALOG INPUT DATA
This data can be read using a BACnet or Modbus network connection and can NOT be modified using this connection.
The Modbus Register Address for these points is 513 + AI #.
AI
BACNET NAME
ANALOG INPUT DESCRIPTION
1
lChlT
lEAVING ChIllED lIQUID TEMP
2
RChlT
RETURN ChIllED lIQUID TEMP
3
DAT
DISChARGE AIR TEMP (COND UNIT ONly)
4
S1_SUCT_TEMP
SyS 1 SUCTION TEMPERATURE (EEV AND COND UNIT ONly)
5
OAT
AMBIENT AIR TEMPERATURE
6
S1_SUCT_Sh
SyS 1 SUCTION SUPERhEAT (EEV ONly)
7
S1_RUN_TIME
SyS 1 RUN TIME (SECONDS)
8
S1_SUCT_PR
SyS 1 SUCTION PRESSURE
9
S1_DSCh_PR
SyS 1 DISChARGE PRESSURE
10
S1_SUCT TEMP
SyS 1 SUCTION TEMPERATURE
11
S1_CIR_TEMP
SyS 1 COOlER INlET REFRIGERANT TEMPERATURE (R-407C ONly)
12
S1_DEF_TEMP
SyS 1 DEFROST TEMPERATURE (hP ONly)
13
S1_EEV_OUT
SyS 1 EEV OUTPUT % (EEV ONly)
14
S1_AR_TIMER
SyS 1 ANTI-RECyClE TIMER
Continued on next page
Summary of Contents for YCAL0012EC
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