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New Era Pump Systems Inc.
RS-232 Communications
9.
The syringe heater can communicate with any computer or device with an RS-232 communications port or
converter.
9.1
Connection and Networking
On the side of the heater are 2 square RJ-11 ("phone jack" style) sockets. Connect the RS-232
cable (CBL-PC-PUMP-7) into the socket labeled "Computer". Connect the other end to the serial port on
the computer, converter cable, or other control device.
If the heater is part of a RS-232 network, connect a RS-232 network cable (CBL-NET-7) between the
socket labeled "Pump" on the heater and the socket labeled "Computer" on the next device in the network.
Repeat for each device in the network, connecting the "To Network" or "Pump" socket of one device to the
"Computer" socket on the next device in the network. Up to 100 devices can be networked together with a
computer. When communicating with a device in a multi-device network, each preceding device in the
network must be powered on.
Each device in the network needs a unique network address to identify the device to the computer.
Network addresses are from 00 to 99. If the network consists of only 1 device, set the device's address to 0
(default setting). Also, each device needs to be set to the same baud rate as the computer. Use the 'Setup'
function on the keypad to set the network address. See section 5, "Setup Settings". The '*ADR' command
can also be used to set the network address.
The supported baud rate is 19,200.
9.2
RS-232 Protocol:
When the device is used in a multi-device network configuration, precede each command with a device
address. Devices will ignore all commands that do not have their defined network address. If the network
address is not specified in the command, the address will default to 0.
After a command is sent to the device, the device will not accept any further communications until the
current command has been processed. Completion of the command processing is indicated when the first
byte of the response packet is transmitted. While the user is changing data or configurations from the
keypad, command processing is delayed.
Communications to and from the device uses the following data frame:
Supported RS-232 Data Frame
Baud rate:
Frame:
Every command received by a device in the network is acknowledged by the device with a response packet
that includes a status character indicating the current operational state of the device.
9.2.1 RS-232 General Syntax Legend
The following syntax expansion legend is common to all syntax expansions:
Except where indicated, all command and response characters are ASCII data.
<float> => <f> [ <float> ]
<on-off> =>
1
0
Publication #1200-01
www.SyringeHeater.com
19,200
10 bit data frame (8N1):
Start bit:
1
Data bits:
8
Stop bits:
1
Parity:
None
Floating point number. Maximum of 4 digits plus 1
decimal point. Maximum of 3 digits to the right of the
decimal point.
On, enabled
Off, disabled
9
Model HEATER-KIT-1
12/25/20
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