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10.1 Controller with RS-232 port
The system bus connection is located at the back of the controller housing (RJ-12 jack).
In this case, the controller can be connected either directly to the serial interface of a PC
(point-to-point connection) or to a (dial-up) modem. A dial-up modem is required if the control-
ler is to be connected to the telecommunications network. In this case, the controller works au-
tonomously and can issue an alarm call to the building control station when errors occur. Addi-
tionally, the building control station can dial up the controller, read data from it, and send new
data once the valid key number has been written to the holding register no. 40070.
On recognizing the key code from the controller as valid, the register value "1" confirms writing
permission. In any other case, the register value remains at "0". Any further establishment of
communications requires the writing permission to be acquired by resending the key number.
Note!
If a wrong key number has been written to holding register no. 40070 for the third consecutive
time, the controller immediately interrupts the modem connection and sets the D6 bit of the error
status register (Unauthorized access). As a result, the call to the configured control system is
triggered and a text message/fax sent. Bit D6 is deleted as soon as the error status register has
been read by the control system and the connection has been terminated.
In special cases, the Lock dial-up function can be selected to stop dial-up in case an error oc-
curs. Using the Dial-up also upon corrected error function, the controller additionally informs
the building control station when a previously signaled error no longer persists.
Functions
Modbus
Modem function
Modem dialing procedure
Lock dial-up
Modbus 16-bit addressing
Dial-up also upon corrected fault
Parameters*
Station address (ST.-NR)
Baud rate (BAUD)
Cyclic initialization (I)
Modem dial interval between calls (P)
WE
Configuration
ON
Co9 -> Fb00 = ON
OFF
Co9 -> Fb01 = ON
OFF
Co9 -> Fb02
OFF
Co9 -> Fb03
OFF
Co9 -> Fb04
OFF
Co9 -> Fb00
WE
Parameter level / Range of values
255
PA9 / 1 to 247 (with Fb04 = ON: 1 to 999)
9600
PA9 / 300 to 19200
30 min PA9 / 0 to 255 min
5 min
PA9 / 1 to 255 min
Communication
67
EB 5474 EN
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