Remote Control; Setup For Remote Control; Communication With A Pc Or A Superordinated Data System - Xylem SI Analytics CT 72/2 Manual De Instrucciones

10.

Remote control

10.1. Setup for remote control

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1
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RS232C

10.2. Communication with a PC or a superordinated data system


•
Check the interface parameters for both interfaces (on circulator and PC) and
make sure they match.
(Serial interface refer to page 87)
•
In the menu > MENU CONFIG < set the menu item > REMOTE < to
> ON < .
•
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 thermostat is turned off.
If the thermostat 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 thermostat 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:
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.
Remote control
set parameters
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