dejan Posted June 22, 2011 Report Share Posted June 22, 2011 Hi all, I have problem connecting to GPRS router, maybe problem is in cable or software a don't know. I successfully configured GPRS communication with routers and configured them to work as MODBUS slave.( One remote unit configured as modbus slave (modbus address 1) which have some inputs for analog signals and other unit next to Jazz which only works as a router). I tried "modbus poll" program to test communication with routers on PC and found that my data is located on modbus address 30003. Now the problem is connecting to Jazz. Configuration of modbus is similar to one from example except that I used timeout time 700 instead of 100 For modbus commands settings are: SI 141 #1 SI142 #0 ??? SI 143 #10 SI 144 #3 SI 145 #5 SI 140 #604 or # 609 And for cable connection pinout is: Jazz MJ1022-CS10 Router 7 RTS ----------- 1 DCD ???? 3 Tx ----- ----- 2 RD 2 Rx ----- ----- 3 TD ----- ----- 4 DTR 5 Gnd ----- ----- 5 GND 4 DTR ----- ----- 6 DSR ----- ----- 7 RTS ----- ----- 8 CTS ----- ----- 9 RI Thanks Best regards Quote Link to comment Share on other sites More sharing options...
Emil Posted June 22, 2011 Report Share Posted June 22, 2011 Hi Dejan, Which communicationg module you're using in Jazz - JZ-PRG or JZ-RS4? In case you use JZ-PRG, please note, that it needs external power and active port to wake it up. Usually the PC's RS323 D-sub connector gives power to pins 1 & 6 of RJ11 of JZ-PRG. Also, you need ot be sure the router port is active. Quote Link to comment Share on other sites More sharing options...
dejan Posted June 23, 2011 Author Report Share Posted June 23, 2011 I'm using JZ-PRG, and after connecting pins like on attached picture i got "2" as status massage on SI66 (illegal data address). Maybe communication it's working, and I just need to adjust parameters for modus commands? Thanks Quote Link to comment Share on other sites More sharing options...
Emil Posted June 23, 2011 Report Share Posted June 23, 2011 If you try to read address 30003, it's normal to receive Illegal address. You need to subtract 30001 from this address. I guess the address you need is 2. I'm not sure I understand your wiring diagram and if it's right. Let's try with address 2 and see what will be the result. Quote Link to comment Share on other sites More sharing options...
dejan Posted June 24, 2011 Author Report Share Posted June 24, 2011 Thanks, made it finally, with address 2 and #609 in SI140. Thanks again bast regards. Quote Link to comment Share on other sites More sharing options...
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