Testing The Board With The Mttty Program; Rs422, Rs232 And 20 Ma Current Loop; Fig. 8-5: The Mttty Program - Addi-Data ADDICOM APCI-7800 Technical Description

APCI-7800
8.2

Testing the board with the MTTTY program

RS422, RS232 and 20 mA Current Loop

♦ Install the program on your PC.
The program is delivered on the ADDI-DATA driver CD-RoM CD1. Under
CD/MTTTY start the setup.exe file.
The following windows opens.
♦ Select the right COM interface under "Port".
♦ Connect it with "File/Connect".
If the shorting plug is connected, each key stroke (= Data transmission)
must result in the corresponding key character displayed on the screen
(= Data reception). If the test is successfully carried out, the board works.
Once the port is initialised the state of the "Modem Control Signals" can be
read in Modem Status. If the RTS signal is set, the CTS state is displayed
under Modem Status. For DTR the 3 other fields are set.
40

Fig. 8-5: The MTTTY program

Testing the board