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5.1 Option switch settings
The option switches on the KITZ front plate allow the user to configure the KITZ
to suit the application requirements.
The following table lists the KITZ option switch functions.
Switch No. Function
0 to 2 RS232 (IEC-870) data rate selection
3 RS232 (IEC-870) frame format
4 Add IEC time tag to K-Bus message
5 Modem present
6 Modem set-up
7 Reserved
Table 3. KITZ option switch functions.
A switch function is operational when in the UP position (marked 1). The switch
position at power-up determines which features are enabled (or settings apply).
Any changes made to the switch positions while the supply is present will not
affect the operation.
5.2 Data rate selection
The three left-hand switches (switches 0 to 2) control the KITZ IEC-870 (RS232)
port data communication rate setting.
The RS232 port is capable of supporting asynchronous serial communication at
the data rates specified in Table 4. The corresponding switch settings are also
shown in the table.
Data Rate Switch 0 Switch 1 Switch 2
1200 Position 0 Position 0 Position 0
2400 Position 1 Position 0 Position 0
4800 Position 0 Position 1 Position 0
9600 Position 1 Position 1 Position 0
19200 Position 0 Position 0 Position 1
38400 Position 1 Position 0 Position 1
57600 Position 0 Position 1 Position 1
115200 Position 1 Position 1 Position 1
Table 4. KITZ IEC-870 (RS232) Port data rate selection.
5.3 RS232 (IEC-870) frame parity
The fourth switch (switch 3) allows the frame format of the RS232 (IEC-870)
communications port to be set to the following modes:
Position 0 Asynchronous 11 bit (1 start bit, 8 data bits, 1 parity, 1 stop bit)
Position 1 Asynchronous 10 bit (1 start bit, 8 data bits, no parity, 1 stop bit)
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