Programming With Westermo TD-22
This tutorial is intended as a supplement to the original manuals for the products. Therefore, use it to familiarise yourself with the products and not as a complete installation guide.
Westermo's TD-22 is a 11 bit industrial modem with a maximum transmission rate (transfer) and mode flows of between 2400 baud, and a maximum communication speed of 19,200 baud.
Procedure for setting up Westermo TD-22
* Recommendation for bad telephone lines - Do not connect pins 4 and 5 on the TD-22 with pins 4 and 5 (respectively) on the PLC, even if the cable requires this.
NB! Recipe was tested on a TD-32 modem with SW5: 4 = ON, instead of 1 and 3. This allows a transmission speed of 9,600 baud between moderate flows, which was previously 2400 baud with TD-22. The following command answers given by connection: TD-32: CONNECT 9600/REL - MNP (or - LAPM) or TD-22: CONNECT 2400/REL - MNP (or - LAPM) Tested against both ports, both on a CQM1-CPU43 and a C200HX-CPU64.