JULABO SE-Z Heating Circulators - Manual (Page 71)

HE / SE
71
12. Remote control
12.1. Setup for remote control
9 6
5 1
RS232C
1. Check the interface parameters for both interfaces (on circulator and PC)
and make sure they match.
(Serial interface refer to page 48)
2. In the menu > MENU CONFIG < set
the menu item
to
.
3. Connect both units with an interface cable..
Like all parameters which can be entered through the keypad, interface
parameters are stored in memory even after the circulator is turned off.
12.2. Communication with a PC or a superordinated data system
If the circulator is put into remote control mode via the configuration level, the
VFD COMFORT-DISPLAY will read “R -OFF-” = REMOTE STOP. The
circulator is now operated via the computer.
In general, the computer (master) sends commands to the circulator (slave).
The circulator sends data (including error messages) only when the
computer sends a query.
In remote control mode, the start command and all values to be set must be
resent by the PC via the interface in case of a power interruption.
AUTOSTART is not possible.
A transfer sequence consists of:
•
command
•
space ( ⇔; Hex: 20)
•
parameter (decimal separation with a period)
•
end of file (
↵; Hex: 0D)
The commands are divided into in and out commands.
in commands:
retrieve parameters
out commands: set parameters
Important times for a command transmission:

To ensure a safe data transfer, the time gap between two commands should
be at least 250 ms.
The circulator automatically responds to an in command with a data string
followed by a LF (Line Feed). The next command should only be sent after
10 ms.
The out commands are valid only in remote control mode.
Command to set the working temperature > SETPNT 1< to 55.5 °C
out_sp_00
⇔ 55.5↵
Command to retrieve the working temperature > SETPNT 1< in_sp_00
↵
Response from the circulator: 55.5
↵