PolyScience Chiller User Manual

110-240 40
RS232 Communications
Serial Connector — A 9-pin D-connector is provided on the back panel of the Chiller for RS232 data
communication. A serial cable that uses only the following pins should be used to connect the Chiller to the
computer:
Pin #2 — data read (data from computer)
Pin #3 — data transmit (data to computer)
Pin #5 — signal ground
RS232 Protocol
— The controller uses the following RS232 protocol:
Data bits — 8
Parity — none
Stop bits — 1
Flow control — none
Baud rate — selectable (Chiller and PC baud rates must match).
Communications Commands
— Commands must be entered in the exact format shown. Do not send a [LF] (line
feed) after the [CR] (character return). Be sure to follow character case exactly. A response followed by an
exclamation point (!) indicates that a command was executed correctly. A question mark (?) indicates that the Chiller
could not execute the command (either because it was in an improper format or the values were outside the
allowable range). A response must be received from the Chiller before another command can be sent. All responses
are terminated with a single [CR].
Command Description
Command
Format
Values Return Message
Set command echo SEi[CR]
Echo: i = 1
No Echo: i = 0
![CR]
Set on / off SOi[CR]
On: i = 1
Off: i = 0
![CR]
Set set point SSxxx[CR] x = ASCII digit ![CR]
Read set point temperature RS[CR]
+xxx.x[CR] or
- xxx.x[CR]
Read temperature RT[CR]
+xxx.x[CR] or
- xxx.x[CR]
Read probe 1 temperature R1[CR]
+xxx.x[CR] or
- xxx.x[CR]
Read probe 2 temperature R2[CR]
+xxx.x[CR] or
- xxx.x[CR]
Read temperature units RU[CR] C or F C[CR] or F[CR]
Read status RW[CR]
1 = Run
0 = Standby
1[CR] or 0[CR]
Read pressure in PSI RP[CR] + xxx.x[CR]
Read pressure in kPa RK[CR] + xxx.x[CR]
Read flow in GPM RG[CR] + xxx.x[CR]
Read flow in LPM RL[CR] + xxx.x[CR]
Read remote control voltage RC[CR] + xxx.x[CR]
Read line voltage RV[CR] + xxx.x[CR]
Read compressor discharge
temperature (°C)
RH[CR]
+xxx.x[CR] or
- xxx.x[CR]
Read remote probe temperature RR[CR]
+xxx.x[CR] or
- xxx.x[CR]
Read ambient temperature on PCB RA[CR]
+xxx.x[CR] or
- xxx.x[CR]

PolyScience Chiller Specifications

General

Brand	PolyScience
Model	Chiller
Category	Chiller
Language	English