ESD electronic CAN-CBM-PLC/331-1, Hardware Manual

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User Parameters
CAN-CBM-SIO, CAN-CBM-SIO4 Software Rev. 1.0 3 - 7
Explanations of bits of parameter Mode
RTS-Mode...... Via this bit the RTS-modem mode for RS485-interfaces can be
selected.
RTS-mode Evaluation
0
RTS on Rx
(default setting)
1 RTS-modem (RS485)
Table 3.3.5:
Evaluation of RTS-mode bits
CTS* enable... Via this bit the CTS*-function of the serial controllers is
enabled.
If the bit is '0', the CTS* signal will not be evaluated and the
controller transmits the available data at once (provided the
module is not in ‘Suspend’ status).
The evaluation of bits can be taken from the following table.
CTS*
enable bit
CTS* -evaluation
0
CTS* -input is ignored
(always at terminal interface)
1 hardware handshake
CTS* -input is evaluated:
(default setting for channel 1...4)
Table 3.3.6:
Evaluation of 'CTS* enable' bits
The RS232 driver used activate the CTS* signal automatically,
if the CTS* line of the serial interface is not connected.
At the terminal interface (DSUB9) the CTS input is not
evaluated. The CTS* enable bit is insignificant for this
interface, therefore.