Command errors and alarms, Rs-232 command set, Rs-232 commands – New Era HEATER-KIT-1LG Syringe Heater User Manual

Page 11: Heating commands

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New Era Pump Systems Inc.

www.SyringeHeater.com

Model HEATER-KIT-1

Publication #1200-01

10

04/23/14

<CR> => (0x0D)

Carriage return

<STX> => (0x02)

Start of packet transmission indicator

<ETX> => (0x03)

End of packet transmission indicator

<length> => <byte>

Number of bytes remaining in packet, including this byte

7.3

Command Errors and Alarms

If a command received by the device is not recognized or the data is invalid, an error message will be in the
<data> field of the response packet following the <prompt> field. The following are the error responses:

<command error> => ? <error>

<error> =>

λ

Command is not recognized (‘?’ only)

NA

Command is not currently applicable

OOR

Command data is out of range

COM

Invalid communications packet received

IGN

Command ignored due to a simultaneous new Phase start

When an alarm occurs, the alarm must be acknowledged before any data is changed or the device is started.
Alarms are acknowledged by the user clearing the alarm message on the keypad, or the alarm status being
sent in response to any valid RS-232 command.

7.4

RS-232 Command Set

Data changes made from RS-232 will not be stored in non-volatile memory until a Save command is
executed: SAV

A packet without a command is interpreted as a status query. The addressed device responds with a status
only response packet.

Except where noted, a setting command without its parameter queries the command setting. The response
packet data will include the requested data. In general, the query response data will be in the same format
as the parameter for setting the command. For example, the query temperature setpoint command ‘SET’
will respond with ‘<nnn>‘ as the response ‘<data>‘.

Otherwise, the command is a set command. If the data was set, a status only response packet will be sent.
If the data was not set, the response packet will include an error (<command error>) message indicating
why the data was not set.

All commands are upper case. Spaces are optional. Lower case letters are converted to uppercase when
received.

7.5

RS-232 Commands

<command> =>

HEATING COMMANDS

START ACTIVE HEATING MODE

RUN

Enter active mode, maintaining heating temperature.


STOP ACTIVE HEATING MODE

STP

Exit active mode. Stops heating the heating pads.


TEMPERATURE QUERY

TMP

Query primary heating pad temperature in currently set units.

Query response: <nnn>

HEATING SET POINT

SET [ nnn ]

Set/Query Heating set point in currently set units.

Query response: <nnn>

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