101-001 (iTDC), 101-002 (EIO88), 101-145 (iTDCSR) -75- Users Manual
IDTeck – iTDC 2~4 DOOR ACCESS CONTROLLER
☞
The controller does not communicate with PC.
Cause Defective cable is used, errors in wiring, an error in setting COMM ID of the controller, or
damage on the communication port (either on PC side or on the controller side).
Solution
1. Please, check the settings of the application S/W and the controller.
- Check the controller’s COMM ID is listed on the application S/W.
- Set the different COMM ID when two or more controllers are installed.
- Check the communication speed (9600bps default) is the same as the setting on the S/W.
- Make sure that the PC’s COM port is set correctly on the S/W.
- The parameters at the S/W should be set as follows.
Parity bit: NONE
Data bit: 8bit
Stop bit: 1bit
2. RS_422 Jumper
2. Check the line connection for communication.
RS232 RS422
(mono)
iTDC PC iTDC
RS422/232
Converter
PC
TX port
TX
RX(-)
TX(-)
RX port
RX
RX(+)
TX(+)
GND GND TX(-)
RX(-)
TX(+)
RX(+)
The RS232 cable from
the converter
RS422 (Multi Drop)
iTDC
iTDC
RS422/232
Converter
PC
RX(-) RX(-) TX(-)
RX(+) RX(+) TX(+)
TX(-) TX(-) RX(-)
TX(+) TX(+) RX(+)
The RS232 cable from
the converter
3. In case of setting RS422 communication, recommend to use line-end resistors of 120 Ohm
between the RX (+) and RX (-) lines and between the TX (+) and TX (-) lines, and apply the
same resistors to the converter RS422 lines. Consult a service centre or an electric
