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Chapter 7 XGT Dedicated Communication
7-35
7.5 Modem Communication
7.5.1 Summary
When using RS-232C and RS 422/485, because of characteristic of communication type, communication
length is limited (RS-232C: 15m, RS 422/485: 500m). If Modem and Cnet module is used, control of remote
PLC is possible.
7.5.2 Remote connection through modem
[Figure 7.5.1] is example of remote connection between PC (XG5000) and PLC by modem. That configuration
is necessary when connecting PC with remote PLC through telephone line, dedicated modem or wireless
modem. At this time, set communication type on the communication settings as modem.
There are two methods for connection by modem (dedicated modem, which uses dedicated line, and dial-up
modem, which uses airline).
(1) Connection method by modem
[Figure 7.5.1] is connection example through dial-up modem. Dial-up modem connection is modem connection
that uses remote connection adding making phone call and hanging up phone call. Namely, XG5000 makes
phone call and after connection of phone, remote connection is executed. PC can use external modem and
internal dial-up modem. Cnet I/F module uses the external modem.
[Figure 7.5.1] Example of XG5000 remote connection through dial-up modem
XGT PLC Cnet #1
XG5000
Summary of Contents for XGL-C22A
Page 172: ...Chapter 8 Modbus Communication 8 23 ...
Page 246: ...Chapter 10 Program Examples 10 40 XG 5000 program Sequence Program 1 2 3 4 ...
Page 247: ...Chapter 10 Program Examples 10 41 Sequence Program 5 6 ...
Page 289: ...Appendix A 23 Sub procedure module When port open event occurs perform the next module ...
Page 291: ...Appendix A 25 The lower code shows BCC check setting ...