Laird Nextreme NRC1200 Series, Руководство пользователя

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Communications Interface
Instructions for Setup
RS232 and RS485 serial communications are available. They are accessible via the DB-9 connectors
on the rear of the chiller. Refer Inadmissible Operating Conditions to avoid any safety hazards.
A Terminal Emulator or other comparable device will need to be connected to the DB-9 to allow
command to be entered.
Terminal Settings:
Baud Rate 115200, Data – 8-bit, Parity – none, Stop – 1 bit, Flow Control - none
Commands and responses:
Command Description General Response
CMP Compressor on//off Status of Compressor query (returns "ON/OFF")
COL Set/Get Coolant type Coolant Percentage (returns "xx")
CRT Coolant Return Temp Coolant Return Temperature query (returns “xxx.x C/F”)
CSP Coolant supply pressure Coolant Supply Pressure query (returns “xx.xx bar/psi”)
CST Coolant Supply Temp Coolant Supply Temperature query (returns “xxx.xx C/F”)
CTL Set/get control loop System Control Loop [R {Run}, S {Stop}]
DAT Set/Get date Set/Get Date (returns "xx/xx/xx)
FCC Fan duty cycle Fan Duty cycle query (returns xxx.xx)
FLO Set/Get flow option Flow sensor Availability check (returns "1" if present, "0" if not present)
FLW Get flow rate Flow Rate query (returns “xx.xx LPM/GPM”)
LVL Coolant level sensor Coolant Level Switch status query (returns “LOW”, “OK”)
MOD Model Displays the model number
PBP Pressure bar/psi Set Pressure in bar/psi (returns "bar/psi")
PMP Pump on//off Control Power to Pump [ON, OFF] (default = OFF)
RDP Get R_CSP Refrigerant Discharge Pressure query (returns “xx.xx bar/psi”)
REF Refrigerant type Refrigerant type R513A
RSP Get R_SSP Refrigerant Suction Pressure query (returns “xx.xx bar/psi”)
SCF Degrees C or F Select °C or °F [C, F] (default = C)
SSN System serial number Serial number is displayed
TIM Set/Get time Time [00:00:00-23:59:59] (default = 00:00:00)
TSP Temp setpoint Control Temperature Set Point [-10.0 to 40.0] (default = 20)
VER Get firmware version Version query (returns “FIRMWARE VERSION X.X”)
XPM Flow Rate Unit Flow Rate Unit [G {Gallons}, L {Liters}] (default = L)
Command entry format
$[2-character source ID] [3 Character Command], [Data Field if required]
Command strings without contents in Data Field will be interpreted as a query.
Source ID
PC Serial link to a PC or external digital serial interface
Command Structure Examples
$PCCST (Requests current Temperature of Fluid Supply Line via PC)
CST,25 (Response from controller reporting Coolant Supply Temperature)
$PCVER (Returns [ VER FIRMWARE VERSION x.x.x])