There are two main ways in which an RS485 converter work:
- Automatic Send Data Control
- RTS/CTS control
These control the way in which the converter flips from transmitting to receiving.
SpecView DOES NOT control the RTS/CTS/DSR lines on the RS232 port, so any converter that relies on these signals to switch from transmit to receive will not work.
Almost all B&B Electronics convertors use Automatic Send Data Control, where the direction of transmission is controlled by the converter, not by SpecView. Many other types of device also use this, e.g. KD485 ADE
SCADA software for people with other jobs!